PHP实现文件上传下载——心在忙而已
这一周都没有写什么东西，是啊，一周时间都没有学习太多新的东西，除了开车。
妈蛋啊，天天中午去学车然后两周没有午觉的日子还是很崩溃的，加上之后工作压力带来的心忙，宝宝不开心啊。
不过，也是自己不是那么能吃苦吧。那天看到的那句话怎么说的来着，我痛恨自己，在简单和困难之前，选择了前者；在什么什么面前，balabala，不是很鸡汤，但有点触动，愿少点矫情和娇气。
PHP实现文件上传与下载——来自mooc网
一、上传原理与配置
1.1 原理
将客户端文件上传到服务器端，再将服务器端的文件（临时文件）移动到指定目录即可。
1.2 客户端配置
所需：表单页面（选择上传文件）；
具体而言：发送方式为POST，添加enctype="multipart/form-data"属性，两者缺一不可（但是，优缺点并存，这里也限定了上传的方式和上传的文件之后的调用等方面，后面会说到）
<span style="color: #0000ff;"><span style="color: #ff00ff;">DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">html</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">head</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">meta </span><span style="color: #ff0000;">http-equiv</span><span style="color: #0000ff;">="Content-Type"</span><span style="color: #ff0000;"> content</span><span style="color: #0000ff;">="text/html; charset=UTF-8"</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">title</span><span style="color: #0000ff;">></span>Insert title here<span style="color: #0000ff;"></span><span style="color: #800000;">title</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"></span><span style="color: #800000;">head</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">body</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">form </span><span style="color: #ff0000;">action</span><span style="color: #0000ff;">="doAction.php"</span><span style="color: #ff0000;"> method</span><span style="color: #0000ff;">="post"</span><span style="color: #ff0000;"> enctype</span><span style="color: #0000ff;">="multipart/form-data"</span><span style="color: #0000ff;">></span><span style="color: #000000;">请选择您要上传的文件：</span><span style="color: #0000ff;"><span style="color: #800000;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="file"</span><span style="color: #ff0000;"> name</span><span style="color: #0000ff;">="myFile"</span> <span style="color: #0000ff;">/><span style="color: #800000;">br</span><span style="color: #0000ff;">/></span><span style="color: #0000ff;"><span style="color: #800000;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="submit"</span><span style="color: #ff0000;"> value</span><span style="color: #0000ff;">="上传"</span><span style="color: #0000ff;">/></span><span style="color: #0000ff;"></span><span style="color: #800000;">form</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"></span><span style="color: #ff00ff;">php</span><span style="color: #0000ff;">?></span><span style="color: #0000ff;"></span><span style="color: #800000;">body</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"></span><span style="color: #800000;">html</span><span style="color: #0000ff;">></span></span></span></span></span></span></span></span></span></span></span>
先是表单页面（请自动忽略前端问题。。。），关键就是form的属性；另外就是input 中用到了type="file"这一点（体现到php的强大的拓展等等）。
然后是doAction
<span style="color: #000000;">php</span><span style="color: #008000;">//</span><span style="color: #008000;">$_FILES:文件上传变量//print_r($_FILES);</span><span style="color: #800080;">$filename</span>=<span style="color: #800080;">$_FILES</span>['myFile']['name'<span style="color: #000000;">];</span><span style="color: #800080;">$type</span>=<span style="color: #800080;">$_FILES</span>['myFile']['type'<span style="color: #000000;">];</span><span style="color: #800080;">$tmp_name</span>=<span style="color: #800080;">$_FILES</span>['myFile']['tmp_name'<span style="color: #000000;">];</span><span style="color: #800080;">$size</span>=<span style="color: #800080;">$_FILES</span>['myFile']['size'<span style="color: #000000;">];</span><span style="color: #800080;">$error</span>=<span style="color: #800080;">$_FILES</span>['myFile']['error'<span style="color: #000000;">];</span><span style="color: #008000;">//</span><span style="color: #008000;">将服务器上的临时文件移动到指定位置//方法一move_upload_file($tmp_name,$destination)//move_uploaded_file($tmp_name, "uploads/".$filename);//文件夹应提前建立好，不然报错//方法二copy($src,$des)//以上两个函数都是成功返回真，否则返回false//copy($tmp_name, "copies/".$filename);//注意，不能两个方法都对临时文件进行操作，临时文件似乎操作完就没了，我们试试反过来</span><span style="color: #008080;">copy</span>(<span style="color: #800080;">$tmp_name</span>, "copies/".<span style="color: #800080;">$filename</span><span style="color: #000000;">);</span><span style="color: #008080;">move_uploaded_file</span>(<span style="color: #800080;">$tmp_name</span>, "uploads/".<span style="color: #800080;">$filename</span><span style="color: #000000;">);</span><span style="color: #008000;">//</span><span style="color: #008000;">能够实现，说明move那个函数基本上相当于剪切；copy就是copy，临时文件还在//另外，错误信息也是不一样的，遇到错误可以查看或者直接报告给用户</span><span style="color: #0000ff;">if</span> (<span style="color: #800080;">$error</span>==0<span style="color: #000000;">) { </span><span style="color: #0000ff;">echo</span> "上传成功！"<span style="color: #000000;">;}</span><span style="color: #0000ff;">else</span><span style="color: #000000;">{ </span><span style="color: #0000ff;">switch</span> (<span style="color: #800080;">$error</span><span style="color: #000000;">){ </span><span style="color: #0000ff;">case</span> 1: <span style="color: #0000ff;">echo</span> "超过了上传文件的最大值，请上传2M以下文件"<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> 2: <span style="color: #0000ff;">echo</span> "上传文件过多，请一次上传20个及以下文件！"<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> 3: <span style="color: #0000ff;">echo</span> "文件并未完全上传，请再次尝试！"<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> 4: <span style="color: #0000ff;">echo</span> "未选择上传文件！"<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> 5: <span style="color: #0000ff;">echo</span> "上传文件为0"<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; }}</span>
先把print_r($_FILES)这个信息看一下
<span style="color: #000000;">Array( [myFile] => Array ( [name] => 梁博_简历.doc [type] => application/msword [tmp_name] => D:\wamp\tmp\php1D78.tmp [error] => 0 [size] => 75776 ))</span>
所以得到的是个二维数组，该怎么用，都是基本的东西（其实我喜欢降维再用）；
基本是一眼就懂的东西，不罗嗦，关键有两个：tmp_name临时文件名；error报错信息（代号，后面可以利用）；
然后这里看一下doAction后面一部分，利用报错信息来反馈给用户，需要说明的是为什么报错，和报错信息是什么都；
1.3 关于报错
--报错原因
基本上都是超过或者不符合服务器关于上传文件的配置，那么服务器端配置有哪些呢？
先考虑上传我们用了什么？POST，upload
所以在php.ini中找这么几项：
file_upload:On
upload_tmp_dir=——临时文件保存目录；
upload_max_filesize=2M
max_file_uploads=20——允许一次上传的最大文件数量（注意和上面那个的区别，有没有size，别乱想）
post_max_size=8M——post方式发送数据的最大值
其他相关配置
max_exectuion_time=-1——最大执行时间，避免程序不好占用服务器资源；
max_input_time=60
max_input_nesting_level=64——输入嵌套深度；
memory_limit=128M——最大单线程的独立内存使用量
总之都是有关资源的配置。
--错误号
以下（偷懒）引自http://blog.sina.com.cn/s/blog_3cdfaea201008utf.html
UPLOAD_ERR_OK 值：0; 没有错误发生，文件上传成功。
UPLOAD_ERR_INI_SIZE 值：1; 上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值。
UPLOAD_ERR_FORM_SIZE 值：2; 上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值。
UPLOAD_ERR_PARTIAL 值：3; 文件只有部分被上传。
UPLOAD_ERR_NO_FILE 值：4; 没有文件被上传。
注意：这个错误信息是第一步上传的信息，也就是上传到临时文件夹的情况，而不是move或者copy的情况。
二、上传相关限制
2.1 客户端限制
<span style="color: #0000ff;"><span style="color: #800000;">form </span><span style="color: #ff0000;">action</span><span style="color: #0000ff;">="doAction2.php"</span><span style="color: #ff0000;"> method</span><span style="color: #0000ff;">="post"</span><span style="color: #ff0000;"> enctype</span><span style="color: #0000ff;">="multipart/form-data"</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="hidden"</span><span style="color: #ff0000;"> name</span><span style="color: #0000ff;">="MAX_FILE_SIZE"</span><span style="color: #ff0000;"> value</span><span style="color: #0000ff;">="101321"</span> <span style="color: #0000ff;">/></span><span style="color: #000000;">请选择您要上传的文件：</span><span style="color: #0000ff;"><span style="color: #800000;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="file"</span><span style="color: #ff0000;"> name</span><span style="color: #0000ff;">="myFile"</span><span style="color: #ff0000;"> accept</span><span style="color: #0000ff;">="image/jpeg,image/gif,text/html"</span><span style="color: #0000ff;">/><span style="color: #800000;">br</span><span style="color: #0000ff;">/></span><span style="color: #0000ff;"><span style="color: #800000;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="submit"</span><span style="color: #ff0000;"> value</span><span style="color: #0000ff;">="上传"</span><span style="color: #0000ff;">/></span><span style="color: #0000ff;"></span><span style="color: #800000;">form</span><span style="color: #0000ff;">></span></span></span></span></span></span>
这里用input的属性对上传文件的大小和类型进行了限制，但是个人感觉：一，html代码是“可见的”；二，常不起作用（没找到原因，但因为第一个我也想放弃它，知道就好。
2.2 服务器端限制
主要限制大小和类型，再有就是方式。
<span style="color: #000000;">php</span><span style="color: #008080;">header</span>('content-type:text/html;charset=utf-8'<span style="color: #000000;">);</span><span style="color: #008000;">//</span><span style="color: #008000;">接受文件，临时文件信息</span><span style="color: #800080;">$fileinfo</span>=<span style="color: #800080;">$_FILES</span>["myFile"];<span style="color: #008000;">//</span><span style="color: #008000;">降维操作</span><span style="color: #800080;">$filename</span>=<span style="color: #800080;">$fileinfo</span>["name"<span style="color: #000000;">];</span><span style="color: #800080;">$tmp_name</span>=<span style="color: #800080;">$fileinfo</span>["tmp_name"<span style="color: #000000;">];</span><span style="color: #800080;">$size</span>=<span style="color: #800080;">$fileinfo</span>["size"<span style="color: #000000;">];</span><span style="color: #800080;">$error</span>=<span style="color: #800080;">$fileinfo</span>["error"<span style="color: #000000;">];</span><span style="color: #800080;">$type</span>=<span style="color: #800080;">$fileinfo</span>["type"<span style="color: #000000;">];</span><span style="color: #008000;">//</span><span style="color: #008000;">服务器端设定限制</span><span style="color: #800080;">$maxsize</span>=10485760;<span style="color: #008000;">//</span><span style="color: #008000;">10M,10*1024*1024</span><span style="color: #800080;">$allowExt</span>=<span style="color: #0000ff;">array</span>('jpeg','jpg','png','tif');<span style="color: #008000;">//</span><span style="color: #008000;">允许上传的文件类型（拓展名</span><span style="color: #800080;">$ext</span>=<span style="color: #008080;">pathinfo</span>(<span style="color: #800080;">$filename</span>,PATHINFO_EXTENSION);<span style="color: #008000;">//</span><span style="color: #008000;">提取上传文件的拓展名//目的信息</span><span style="color: #800080;">$path</span>="uploads"<span style="color: #000000;">;</span><span style="color: #0000ff;">if</span> (!<span style="color: #008080;">file_exists</span>(<span style="color: #800080;">$path</span>)) { <span style="color: #008000;">//</span><span style="color: #008000;">当目录不存在，就创建目录</span> <span style="color: #008080;">mkdir</span>(<span style="color: #800080;">$path</span>,0777,<span style="color: #0000ff;">true</span><span style="color: #000000;">); </span><span style="color: #008080;">chmod</span>(<span style="color: #800080;">$path</span>, 0777<span style="color: #000000;">);}</span><span style="color: #008000;">//</span><span style="color: #008000;">$destination=$path."/".$filename;//得到唯一的文件名！防止因为文件名相同而产生覆盖</span><span style="color: #800080;">$uniName</span>=<span style="color: #008080;">md5</span>(<span style="color: #008080;">uniqid</span>(<span style="color: #008080;">microtime</span>(<span style="color: #0000ff;">true</span>),<span style="color: #0000ff;">true</span>)).<span style="color: #800080;">$ext</span>;<span style="color: #008000;">//</span><span style="color: #008000;">md5加密，uniqid产生唯一id，microtime做前缀</span><span style="color: #0000ff;">if</span> (<span style="color: #800080;">$error</span>==0<span style="color: #000000;">) { </span><span style="color: #0000ff;">if</span> (<span style="color: #800080;">$size</span>><span style="color: #800080;">$maxsize</span><span style="color: #000000;">) { </span><span style="color: #0000ff;">exit</span>("上传文件过大！"<span style="color: #000000;">); } </span><span style="color: #0000ff;">if</span> (!<span style="color: #008080;">in_array</span>(<span style="color: #800080;">$ext</span>, <span style="color: #800080;">$allowExt</span><span style="color: #000000;">)) { </span><span style="color: #0000ff;">exit</span>("非法文件类型"<span style="color: #000000;">); } </span><span style="color: #0000ff;">if</span> (!<span style="color: #008080;">is_uploaded_file</span>(<span style="color: #800080;">$tmp_name</span><span style="color: #000000;">)) { </span><span style="color: #0000ff;">exit</span>("上传方式有误，请使用post方式"<span style="color: #000000;">); } </span><span style="color: #0000ff;">if</span> (@<span style="color: #008080;">move_uploaded_file</span>(<span style="color: #800080;">$tmp_name</span>, <span style="color: #800080;">$uniName</span>)) {<span style="color: #008000;">//</span><span style="color: #008000;">@错误抑制符，不让用户看到警告</span> <span style="color: #0000ff;">echo</span> "文件".<span style="color: #800080;">$filename</span>."上传成功!"<span style="color: #000000;">; }</span><span style="color: #0000ff;">else</span><span style="color: #000000;">{ </span><span style="color: #0000ff;">echo</span> "文件".<span style="color: #800080;">$filename</span>."上传失败!"<span style="color: #000000;">; } </span><span style="color: #008000;">//</span><span style="color: #008000;">判断是否为真实图片（防止伪装成图片的病毒一类的</span> <span style="color: #0000ff;">if</span> (!<span style="color: #008080;">getimagesize</span>(<span style="color: #800080;">$tmp_name</span>)) {<span style="color: #008000;">//</span><span style="color: #008000;">getimagesize真实返回数组，否则返回false</span> <span style="color: #0000ff;">exit</span>("不是真正的图片类型"<span style="color: #000000;">); }}</span><span style="color: #0000ff;">else</span><span style="color: #000000;">{ </span><span style="color: #0000ff;">switch</span> (<span style="color: #800080;">$error</span><span style="color: #000000;">){ </span><span style="color: #0000ff;">case</span> 1: <span style="color: #0000ff;">echo</span> "超过了上传文件的最大值，请上传2M以下文件"<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> 2: <span style="color: #0000ff;">echo</span> "上传文件过多，请一次上传20个及以下文件！"<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> 3: <span style="color: #0000ff;">echo</span> "文件并未完全上传，请再次尝试！"<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> 4: <span style="color: #0000ff;">echo</span> "未选择上传文件！"<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> 7: <span style="color: #0000ff;">echo</span> "没有临时文件夹"<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; }}</span>
这里，具体实现都有注释，每一步其实都可以自己试试的，很有趣。
2.3 封装
函数
<span style="color: #000000;">php</span><span style="color: #0000ff;">function</span> uploadFile(<span style="color: #800080;">$fileInfo</span>,<span style="color: #800080;">$path</span>,<span style="color: #800080;">$allowExt</span>,<span style="color: #800080;">$maxSize</span><span style="color: #000000;">){</span><span style="color: #800080;">$filename</span>=<span style="color: #800080;">$fileInfo</span>["name"<span style="color: #000000;">];</span><span style="color: #800080;">$tmp_name</span>=<span style="color: #800080;">$fileInfo</span>["tmp_name"<span style="color: #000000;">];</span><span style="color: #800080;">$size</span>=<span style="color: #800080;">$fileInfo</span>["size"<span style="color: #000000;">];</span><span style="color: #800080;">$error</span>=<span style="color: #800080;">$fileInfo</span>["error"<span style="color: #000000;">];</span><span style="color: #800080;">$type</span>=<span style="color: #800080;">$fileInfo</span>["type"<span style="color: #000000;">];</span><span style="color: #008000;">//</span><span style="color: #008000;">服务器端设定限制</span><span style="color: #800080;">$ext</span>=<span style="color: #008080;">pathinfo</span>(<span style="color: #800080;">$filename</span>,<span style="color: #000000;">PATHINFO_EXTENSION);</span><span style="color: #008000;">//</span><span style="color: #008000;">目的信息</span><span style="color: #0000ff;">if</span> (!<span style="color: #008080;">file_exists</span>(<span style="color: #800080;">$path</span><span style="color: #000000;">)) { </span><span style="color: #008080;">mkdir</span>(<span style="color: #800080;">$path</span>,0777,<span style="color: #0000ff;">true</span><span style="color: #000000;">); </span><span style="color: #008080;">chmod</span>(<span style="color: #800080;">$path</span>, 0777<span style="color: #000000;">);}</span><span style="color: #800080;">$uniName</span>=<span style="color: #008080;">md5</span>(<span style="color: #008080;">uniqid</span>(<span style="color: #008080;">microtime</span>(<span style="color: #0000ff;">true</span>),<span style="color: #0000ff;">true</span>)).'.'.<span style="color: #800080;">$ext</span><span style="color: #000000;">;</span><span style="color: #800080;">$destination</span>=<span style="color: #800080;">$path</span>."/".<span style="color: #800080;">$uniName</span><span style="color: #000000;">;</span><span style="color: #0000ff;">if</span> (<span style="color: #800080;">$error</span>==0<span style="color: #000000;">) { </span><span style="color: #0000ff;">if</span> (<span style="color: #800080;">$size</span>><span style="color: #800080;">$maxSize</span><span style="color: #000000;">) { </span><span style="color: #0000ff;">exit</span>("上传文件过大！"<span style="color: #000000;">); } </span><span style="color: #0000ff;">if</span> (!<span style="color: #008080;">in_array</span>(<span style="color: #800080;">$ext</span>, <span style="color: #800080;">$allowExt</span><span style="color: #000000;">)) { </span><span style="color: #0000ff;">exit</span>("非法文件类型"<span style="color: #000000;">); } </span><span style="color: #0000ff;">if</span> (!<span style="color: #008080;">is_uploaded_file</span>(<span style="color: #800080;">$tmp_name</span><span style="color: #000000;">)) { </span><span style="color: #0000ff;">exit</span>("上传方式有误，请使用post方式"<span style="color: #000000;">); } </span><span style="color: #008000;">//</span><span style="color: #008000;">判断是否为真实图片（防止伪装成图片的病毒一类的</span> <span style="color: #0000ff;">if</span> (!<span style="color: #008080;">getimagesize</span>(<span style="color: #800080;">$tmp_name</span>)) {<span style="color: #008000;">//</span><span style="color: #008000;">getimagesize真实返回数组，否则返回false</span> <span style="color: #0000ff;">exit</span>("不是真正的图片类型"<span style="color: #000000;">); } </span><span style="color: #0000ff;">if</span> (@<span style="color: #008080;">move_uploaded_file</span>(<span style="color: #800080;">$tmp_name</span>, <span style="color: #800080;">$destination</span>)) {<span style="color: #008000;">//</span><span style="color: #008000;">@错误抑制符，不让用户看到警告</span> <span style="color: #0000ff;">echo</span> "文件".<span style="color: #800080;">$filename</span>."上传成功!"<span style="color: #000000;">; }</span><span style="color: #0000ff;">else</span><span style="color: #000000;">{ </span><span style="color: #0000ff;">echo</span> "文件".<span style="color: #800080;">$filename</span>."上传失败!"<span style="color: #000000;">; } }</span><span style="color: #0000ff;">else</span><span style="color: #000000;">{ </span><span style="color: #0000ff;">switch</span> (<span style="color: #800080;">$error</span><span style="color: #000000;">){ </span><span style="color: #0000ff;">case</span> 1: <span style="color: #0000ff;">echo</span> "超过了上传文件的最大值，请上传2M以下文件"<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> 2: <span style="color: #0000ff;">echo</span> "上传文件过多，请一次上传20个及以下文件！"<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> 3: <span style="color: #0000ff;">echo</span> "文件并未完全上传，请再次尝试！"<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> 4: <span style="color: #0000ff;">echo</span> "未选择上传文件！"<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> 7: <span style="color: #0000ff;">echo</span> "没有临时文件夹"<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; }}</span><span style="color: #0000ff;">return</span> <span style="color: #800080;">$destination</span><span style="color: #000000;">;}</span>
调用
<span style="color: #000000;">php</span><span style="color: #008080;">header</span>('content-type:text/html;charset=utf-8'<span style="color: #000000;">);</span><span style="color: #800080;">$fileInfo</span>=<span style="color: #800080;">$_FILES</span>["myFile"<span style="color: #000000;">];</span><span style="color: #800080;">$maxSize</span>=10485760;<span style="color: #008000;">//</span><span style="color: #008000;">10M,10*1024*1024</span><span style="color: #800080;">$allowExt</span>=<span style="color: #0000ff;">array</span>('jpeg','jpg','png','tif'<span style="color: #000000;">);</span><span style="color: #800080;">$path</span>="uploads"<span style="color: #000000;">;</span><span style="color: #0000ff;">include_once</span> 'upFunc.php'<span style="color: #000000;">;uploadFile(</span><span style="color: #800080;">$fileInfo</span>, <span style="color: #800080;">$path</span>, <span style="color: #800080;">$allowExt</span>, <span style="color: #800080;">$maxSize</span>);
三、多文件的上传实现
3.1 利用单文件封装
<span style="color: #0000ff;"><span style="color: #ff00ff;">DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">html</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">head</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">meta </span><span style="color: #ff0000;">http-equiv</span><span style="color: #0000ff;">="Content-Type"</span><span style="color: #ff0000;"> content</span><span style="color: #0000ff;">="text/html; charset=UTF-8"</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">title</span><span style="color: #0000ff;">></span>Insert title here<span style="color: #0000ff;"></span><span style="color: #800000;">title</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"></span><span style="color: #800000;">head</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">body</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">form </span><span style="color: #ff0000;">action</span><span style="color: #0000ff;">="doAction5.php"</span><span style="color: #ff0000;"> method</span><span style="color: #0000ff;">="post"</span><span style="color: #ff0000;"> enctype</span><span style="color: #0000ff;">="multipart/form-data"</span><span style="color: #0000ff;">></span><span style="color: #000000;">请选择您要上传的文件：</span><span style="color: #0000ff;"><span style="color: #800000;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="file"</span><span style="color: #ff0000;"> name</span><span style="color: #0000ff;">="myFile1"</span> <span style="color: #0000ff;">/><span style="color: #800000;">br</span><span style="color: #0000ff;">/></span><span style="color: #000000;">请选择您要上传的文件：</span><span style="color: #0000ff;"><span style="color: #800000;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="file"</span><span style="color: #ff0000;"> name</span><span style="color: #0000ff;">="myFile2"</span> <span style="color: #0000ff;">/><span style="color: #800000;">br</span><span style="color: #0000ff;">/></span><span style="color: #000000;">请选择您要上传的文件：</span><span style="color: #0000ff;"><span style="color: #800000;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="file"</span><span style="color: #ff0000;"> name</span><span style="color: #0000ff;">="myFile3"</span> <span style="color: #0000ff;">/><span style="color: #800000;">br</span><span style="color: #0000ff;">/></span><span style="color: #000000;">请选择您要上传的文件：</span><span style="color: #0000ff;"><span style="color: #800000;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="file"</span><span style="color: #ff0000;"> name</span><span style="color: #0000ff;">="myFile4"</span> <span style="color: #0000ff;">/><span style="color: #800000;">br</span><span style="color: #0000ff;">/></span><span style="color: #0000ff;"><span style="color: #800000;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="submit"</span><span style="color: #ff0000;"> value</span><span style="color: #0000ff;">="上传"</span><span style="color: #0000ff;">/></span><span style="color: #0000ff;"></span><span style="color: #800000;">form</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"></span><span style="color: #800000;">body</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"></span><span style="color: #800000;">html</span><span style="color: #0000ff;">></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>
<span style="color: #000000;">php</span><span style="color: #008000;">//</span><span style="color: #008000;">print_r($_FILES);</span><span style="color: #008080;">header</span>('content-type:text/html;charset=utf-8'<span style="color: #000000;">);</span><span style="color: #0000ff;">include_once</span> 'upFunc.php'<span style="color: #000000;">;</span><span style="color: #0000ff;">foreach</span> (<span style="color: #800080;">$_FILES</span> <span style="color: #0000ff;">as</span> <span style="color: #800080;">$fileInfo</span><span style="color: #000000;">){ </span><span style="color: #800080;">$file</span>[]=uploadFile(<span style="color: #800080;">$fileInfo</span><span style="color: #000000;">);}</span>
这里的思路，从print_r($_FILES)中去找，打印出来看到是个二维数组，很简单，遍历去用就好了！
上面那个function的定义改一下，给定一些默认值
<span style="color: #0000ff;">function</span> uploadFile(<span style="color: #800080;">$fileInfo</span>,<span style="color: #800080;">$path</span>="uploads",<span style="color: #800080;">$allowExt</span>=<span style="color: #0000ff;">array</span>('jpeg','jpg','png','tif'),<span style="color: #800080;">$maxSize</span>=10485760){
这样子，简单是简单，但遇到一些问题。
正常的上传4个图片是没问题，但要是中间激活了函数中的exit，就会立即停止，导致其他图片也无法上传。
3.2 升级版封装
旨在实现针对多个或单个文件上传的封装
首先这样子写个静态文件
<span style="color: #0000ff;"><span style="color: #ff00ff;">DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">html</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">head</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">meta </span><span style="color: #ff0000;">http-equiv</span><span style="color: #0000ff;">="Content-Type"</span><span style="color: #ff0000;"> content</span><span style="color: #0000ff;">="text/html; charset=UTF-8"</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">title</span><span style="color: #0000ff;">></span>Insert title here<span style="color: #0000ff;"></span><span style="color: #800000;">title</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"></span><span style="color: #800000;">head</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">body</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">form </span><span style="color: #ff0000;">action</span><span style="color: #0000ff;">="doAction5.php"</span><span style="color: #ff0000;"> method</span><span style="color: #0000ff;">="post"</span><span style="color: #ff0000;"> enctype</span><span style="color: #0000ff;">="multipart/form-data"</span><span style="color: #0000ff;">></span><span style="color: #000000;">请选择您要上传的文件：</span><span style="color: #0000ff;"><span style="color: #800000;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="file"</span><span style="color: #ff0000;"> name</span><span style="color: #0000ff;">="myFile[]"</span> <span style="color: #0000ff;">/><span style="color: #800000;">br</span><span style="color: #0000ff;">/></span><span style="color: #000000;">请选择您要上传的文件：</span><span style="color: #0000ff;"><span style="color: #800000;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="file"</span><span style="color: #ff0000;"> name</span><span style="color: #0000ff;">="myFile[]"</span> <span style="color: #0000ff;">/><span style="color: #800000;">br</span><span style="color: #0000ff;">/></span><span style="color: #000000;">请选择您要上传的文件：</span><span style="color: #0000ff;"><span style="color: #800000;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="file"</span><span style="color: #ff0000;"> name</span><span style="color: #0000ff;">="myFile[]"</span> <span style="color: #0000ff;">/><span style="color: #800000;">br</span><span style="color: #0000ff;">/></span><span style="color: #000000;">请选择您要上传的文件：</span><span style="color: #0000ff;"><span style="color: #800000;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="file"</span><span style="color: #ff0000;"> name</span><span style="color: #0000ff;">="myFile[]"</span> <span style="color: #0000ff;">/><span style="color: #800000;">br</span><span style="color: #0000ff;">/></span><span style="color: #0000ff;"><span style="color: #800000;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="submit"</span><span style="color: #ff0000;"> value</span><span style="color: #0000ff;">="上传"</span><span style="color: #0000ff;">/></span><span style="color: #0000ff;"></span><span style="color: #800000;">form</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"></span><span style="color: #800000;">body</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"></span><span style="color: #800000;">html</span><span style="color: #0000ff;">></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>
打印一下$_FILES
<span style="color: #000000;">Array( [myFile] => Array ( [name] => Array ( [0] => test32.png [1] => test32.png [2] => 333.png [3] => test41.png ) [type] => Array ( [0] => image/png [1] => image/png [2] => image/png [3] => image/png ) [tmp_name] => Array ( [0] => D:\wamp\tmp\php831C.tmp [1] => D:\wamp\tmp\php834C.tmp [2] => D:\wamp\tmp\php837C.tmp [3] => D:\wamp\tmp\php83BB.tmp ) [error] => Array ( [0] => 0 [1] => 0 [2] => 0 [3] => 0 ) [size] => Array ( [0] => 46174 [1] => 46174 [2] => 34196 [3] => 38514 ) ))</span>
可以得到一个三维数组。
复杂是复杂了，但复杂的有规律，各项数值都在一起了，很方便我们取值！！
所以先得到文件信息，变成单文件处理那种信息
<span style="color: #0000ff;">function</span><span style="color: #000000;"> getFiles(){ </span><span style="color: #800080;">$i</span>=0<span style="color: #000000;">; </span><span style="color: #0000ff;">foreach</span>(<span style="color: #800080;">$_FILES</span> <span style="color: #0000ff;">as</span> <span style="color: #800080;">$file</span><span style="color: #000000;">){ </span><span style="color: #0000ff;">if</span>(<span style="color: #008080;">is_string</span>(<span style="color: #800080;">$file</span>['name'])){ <span style="color: #008000;">//</span><span style="color: #008000;">单文件判定</span> <span style="color: #800080;">$files</span>[<span style="color: #800080;">$i</span>]=<span style="color: #800080;">$file</span><span style="color: #000000;">; </span><span style="color: #800080;">$i</span>++<span style="color: #000000;">; }</span><span style="color: #0000ff;">elseif</span>(<span style="color: #008080;">is_array</span>(<span style="color: #800080;">$file</span>['name'<span style="color: #000000;">])){ </span><span style="color: #0000ff;">foreach</span>(<span style="color: #800080;">$file</span>['name'] <span style="color: #0000ff;">as</span> <span style="color: #800080;">$key</span>=><span style="color: #800080;">$val</span>){ <span style="color: #008000;">//</span><span style="color: #008000;">我的天，这个$key用的diao</span> <span style="color: #800080;">$files</span>[<span style="color: #800080;">$i</span>]['name']=<span style="color: #800080;">$file</span>['name'][<span style="color: #800080;">$key</span><span style="color: #000000;">]; </span><span style="color: #800080;">$files</span>[<span style="color: #800080;">$i</span>]['type']=<span style="color: #800080;">$file</span>['type'][<span style="color: #800080;">$key</span><span style="color: #000000;">]; </span><span style="color: #800080;">$files</span>[<span style="color: #800080;">$i</span>]['tmp_name']=<span style="color: #800080;">$file</span>['tmp_name'][<span style="color: #800080;">$key</span><span style="color: #000000;">]; </span><span style="color: #800080;">$files</span>[<span style="color: #800080;">$i</span>]['error']=<span style="color: #800080;">$file</span>['error'][<span style="color: #800080;">$key</span><span style="color: #000000;">]; </span><span style="color: #800080;">$files</span>[<span style="color: #800080;">$i</span>]['size']=<span style="color: #800080;">$file</span>['size'][<span style="color: #800080;">$key</span><span style="color: #000000;">]; </span><span style="color: #800080;">$i</span>++<span style="color: #000000;">; } } } </span><span style="color: #0000ff;">return</span> <span style="color: #800080;">$files</span><span style="color: #000000;">; }</span>
然后之前的那种exit错误，就把exit改一下就好了，这里用res
<span style="color: #0000ff;">function</span> uploadFile(<span style="color: #800080;">$fileInfo</span>,<span style="color: #800080;">$path</span>='./uploads',<span style="color: #800080;">$flag</span>=<span style="color: #0000ff;">true</span>,<span style="color: #800080;">$maxSize</span>=1048576,<span style="color: #800080;">$allowExt</span>=<span style="color: #0000ff;">array</span>('jpeg','jpg','png','gif'<span style="color: #000000;">)){ </span><span style="color: #008000;">//</span><span style="color: #008000;">$flag=true; //$allowExt=array('jpeg','jpg','gif','png'); //$maxSize=1048576;//1M //判断错误号</span> <span style="color: #800080;">$res</span>=<span style="color: #0000ff;">array</span><span style="color: #000000;">(); </span><span style="color: #0000ff;">if</span>(<span style="color: #800080;">$fileInfo</span>['error']===<span style="color: #000000;">UPLOAD_ERR_OK){ </span><span style="color: #008000;">//</span><span style="color: #008000;">检测上传得到小</span> <span style="color: #0000ff;">if</span>(<span style="color: #800080;">$fileInfo</span>['size']><span style="color: #800080;">$maxSize</span><span style="color: #000000;">){ </span><span style="color: #800080;">$res</span>['mes']=<span style="color: #800080;">$fileInfo</span>['name'].'上传文件过大'<span style="color: #000000;">; } </span><span style="color: #800080;">$ext</span>=getExt(<span style="color: #800080;">$fileInfo</span>['name'<span style="color: #000000;">]); </span><span style="color: #008000;">//</span><span style="color: #008000;">检测上传文件的文件类型</span> <span style="color: #0000ff;">if</span>(!<span style="color: #008080;">in_array</span>(<span style="color: #800080;">$ext</span>,<span style="color: #800080;">$allowExt</span><span style="color: #000000;">)){ </span><span style="color: #800080;">$res</span>['mes']=<span style="color: #800080;">$fileInfo</span>['name'].'非法文件类型'<span style="color: #000000;">; } </span><span style="color: #008000;">//</span><span style="color: #008000;">检测是否是真实的图片类型</span> <span style="color: #0000ff;">if</span>(<span style="color: #800080;">$flag</span><span style="color: #000000;">){ </span><span style="color: #0000ff;">if</span>(!<span style="color: #008080;">getimagesize</span>(<span style="color: #800080;">$fileInfo</span>['tmp_name'<span style="color: #000000;">])){ </span><span style="color: #800080;">$res</span>['mes']=<span style="color: #800080;">$fileInfo</span>['name'].'不是真实图片类型'<span style="color: #000000;">; } } </span><span style="color: #008000;">//</span><span style="color: #008000;">检测文件是否是通过HTTP POST上传上来的</span> <span style="color: #0000ff;">if</span>(!<span style="color: #008080;">is_uploaded_file</span>(<span style="color: #800080;">$fileInfo</span>['tmp_name'<span style="color: #000000;">])){ </span><span style="color: #800080;">$res</span>['mes']=<span style="color: #800080;">$fileInfo</span>['name'].'文件不是通过HTTP POST方式上传上来的'<span style="color: #000000;">; } </span><span style="color: #0000ff;">if</span>(<span style="color: #800080;">$res</span>) <span style="color: #0000ff;">return</span> <span style="color: #800080;">$res</span><span style="color: #000000;">; </span><span style="color: #008000;">//</span><span style="color: #008000;">$path='./uploads';</span> <span style="color: #0000ff;">if</span>(!<span style="color: #008080;">file_exists</span>(<span style="color: #800080;">$path</span><span style="color: #000000;">)){ </span><span style="color: #008080;">mkdir</span>(<span style="color: #800080;">$path</span>,0777,<span style="color: #0000ff;">true</span><span style="color: #000000;">); </span><span style="color: #008080;">chmod</span>(<span style="color: #800080;">$path</span>,0777<span style="color: #000000;">); } </span><span style="color: #800080;">$uniName</span>=<span style="color: #000000;">getUniName(); </span><span style="color: #800080;">$destination</span>=<span style="color: #800080;">$path</span>.'/'.<span style="color: #800080;">$uniName</span>.'.'.<span style="color: #800080;">$ext</span><span style="color: #000000;">; </span><span style="color: #0000ff;">if</span>(!<span style="color: #008080;">move_uploaded_file</span>(<span style="color: #800080;">$fileInfo</span>['tmp_name'],<span style="color: #800080;">$destination</span><span style="color: #000000;">)){ </span><span style="color: #800080;">$res</span>['mes']=<span style="color: #800080;">$fileInfo</span>['name'].'文件移动失败'<span style="color: #000000;">; } </span><span style="color: #800080;">$res</span>['mes']=<span style="color: #800080;">$fileInfo</span>['name'].'上传成功'<span style="color: #000000;">; </span><span style="color: #800080;">$res</span>['dest']=<span style="color: #800080;">$destination</span><span style="color: #000000;">; </span><span style="color: #0000ff;">return</span> <span style="color: #800080;">$res</span><span style="color: #000000;">; }</span><span style="color: #0000ff;">else</span><span style="color: #000000;">{ </span><span style="color: #008000;">//</span><span style="color: #008000;">匹配错误信息</span> <span style="color: #0000ff;">switch</span> (<span style="color: #800080;">$fileInfo</span> ['error'<span style="color: #000000;">]) { </span><span style="color: #0000ff;">case</span> 1 : <span style="color: #800080;">$res</span>['mes'] = '上传文件超过了PHP配置文件中upload_max_filesize选项的值'<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> 2 : <span style="color: #800080;">$res</span>['mes'] = '超过了表单MAX_FILE_SIZE限制的大小'<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> 3 : <span style="color: #800080;">$res</span>['mes'] = '文件部分被上传'<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> 4 : <span style="color: #800080;">$res</span>['mes'] = '没有选择上传文件'<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> 6 : <span style="color: #800080;">$res</span>['mes'] = '没有找到临时目录'<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> 7 : <span style="color: #0000ff;">case</span> 8 : <span style="color: #800080;">$res</span>['mes'] = '系统错误'<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; } </span><span style="color: #0000ff;">return</span> <span style="color: #800080;">$res</span><span style="color: #000000;">; }}</span>
里面封装了两个小的
<span style="color: #0000ff;">function</span> getExt(<span style="color: #800080;">$filename</span><span style="color: #000000;">){ </span><span style="color: #0000ff;">return</span> <span style="color: #008080;">strtolower</span>(<span style="color: #008080;">pathinfo</span>(<span style="color: #800080;">$filename</span>,<span style="color: #000000;">PATHINFO_EXTENSION));}</span><span style="color: #008000;">/*</span><span style="color: #008000;">* * 产生唯一字符串 * @return string </span><span style="color: #008000;">*/</span><span style="color: #0000ff;">function</span><span style="color: #000000;"> getUniName(){ </span><span style="color: #0000ff;">return</span> <span style="color: #008080;">md5</span>(<span style="color: #008080;">uniqid</span>(<span style="color: #008080;">microtime</span>(<span style="color: #0000ff;">true</span>),<span style="color: #0000ff;">true</span><span style="color: #000000;">));}</span>
然后静态中，用multiple属性实现多个文件的输入；
<span style="color: #0000ff;"><span style="color: #ff00ff;">DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">html</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">head</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">meta </span><span style="color: #ff0000;">http-equiv</span><span style="color: #0000ff;">="Content-Type"</span><span style="color: #ff0000;"> content</span><span style="color: #0000ff;">="text/html; charset=UTF-8"</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">title</span><span style="color: #0000ff;">></span>Insert title here<span style="color: #0000ff;"></span><span style="color: #800000;">title</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"></span><span style="color: #800000;">head</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">body</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"><span style="color: #800000;">form </span><span style="color: #ff0000;">action</span><span style="color: #0000ff;">="doAction6.php"</span><span style="color: #ff0000;"> method</span><span style="color: #0000ff;">="POST"</span><span style="color: #ff0000;"> enctype</span><span style="color: #0000ff;">="multipart/form-data"</span><span style="color: #0000ff;">></span><span style="color: #000000;">请选择您要上传的文件：</span><span style="color: #0000ff;"><span style="color: #800000;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="file"</span><span style="color: #ff0000;"> name</span><span style="color: #0000ff;">="myFile[]"</span><span style="color: #ff0000;"> multiple</span><span style="color: #0000ff;">='multiple' </span><span style="color: #0000ff;">/><span style="color: #800000;">br</span><span style="color: #0000ff;">/></span><span style="color: #0000ff;"><span style="color: #800000;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="submit"</span><span style="color: #ff0000;"> value</span><span style="color: #0000ff;">="上传"</span><span style="color: #0000ff;">/></span><span style="color: #0000ff;"></span><span style="color: #800000;">form</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"></span><span style="color: #800000;">body</span><span style="color: #0000ff;">></span><span style="color: #0000ff;"></span><span style="color: #800000;">html</span><span style="color: #0000ff;">></span></span></span></span></span></span></span></span></span></span></span>
doAction6
<span style="color: #000000;">php </span><span style="color: #008000;">//</span><span style="color: #008000;">print_r($_FILES);</span><span style="color: #008080;">header</span>("content-type:text/html;charset=utf-8"<span style="color: #000000;">);</span><span style="color: #0000ff;">require_once</span> 'upFunc2.php'<span style="color: #000000;">;</span><span style="color: #0000ff;">require_once</span> 'common.func.php'<span style="color: #000000;">;</span><span style="color: #800080;">$files</span>=<span style="color: #000000;">getFiles();</span><span style="color: #008000;">//</span><span style="color: #008000;"> print_r($files);</span><span style="color: #0000ff;">foreach</span>(<span style="color: #800080;">$files</span> <span style="color: #0000ff;">as</span> <span style="color: #800080;">$fileInfo</span><span style="color: #000000;">){ </span><span style="color: #800080;">$res</span>=uploadFile(<span style="color: #800080;">$fileInfo</span><span style="color: #000000;">); </span><span style="color: #0000ff;">echo</span> <span style="color: #800080;">$res</span>['mes'],'<br>'<span style="color: #000000;">; </span><span style="color: #800080;">$uploadFiles</span>[]=@<span style="color: #800080;">$res</span>['dest'<span style="color: #000000;">];}</span><span style="color: #800080;">$uploadFiles</span>=<span style="color: #008080;">array_values</span>(<span style="color: #008080;">array_filter</span>(<span style="color: #800080;">$uploadFiles</span><span style="color: #000000;">));</span><span style="color: #008000;">//</span><span style="color: #008000;">print_r($uploadFiles);</span>
这样子的几个文件，就实现比较强大的面向过程的上传文件的功能（学的叫一个心酸。。。）；
四、面向对象的文件上传
（不是很写的动了。。。先粘过来，再说吧。。。
<span style="color: #000000;">php </span><span style="color: #0000ff;">class</span><span style="color: #000000;"> upload{ </span><span style="color: #0000ff;">protected</span> <span style="color: #800080;">$fileName</span><span style="color: #000000;">; </span><span style="color: #0000ff;">protected</span> <span style="color: #800080;">$maxSize</span><span style="color: #000000;">; </span><span style="color: #0000ff;">protected</span> <span style="color: #800080;">$allowMime</span><span style="color: #000000;">; </span><span style="color: #0000ff;">protected</span> <span style="color: #800080;">$allowExt</span><span style="color: #000000;">; </span><span style="color: #0000ff;">protected</span> <span style="color: #800080;">$uploadPath</span><span style="color: #000000;">; </span><span style="color: #0000ff;">protected</span> <span style="color: #800080;">$imgFlag</span><span style="color: #000000;">; </span><span style="color: #0000ff;">protected</span> <span style="color: #800080;">$fileInfo</span><span style="color: #000000;">; </span><span style="color: #0000ff;">protected</span> <span style="color: #800080;">$error</span><span style="color: #000000;">; </span><span style="color: #0000ff;">protected</span> <span style="color: #800080;">$ext</span><span style="color: #000000;">; </span><span style="color: #008000;">/*</span><span style="color: #008000;">* * @param string $fileName * @param string $uploadPath * @param string $imgFlag * @param number $maxSize * @param array $allowExt * @param array $allowMime </span><span style="color: #008000;">*/</span> <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span> __construct(<span style="color: #800080;">$fileName</span>='myFile',<span style="color: #800080;">$uploadPath</span>='./uploads',<span style="color: #800080;">$imgFlag</span>=<span style="color: #0000ff;">true</span>,<span style="color: #800080;">$maxSize</span>=5242880,<span style="color: #800080;">$allowExt</span>=<span style="color: #0000ff;">array</span>('jpeg','jpg','png','gif'),<span style="color: #800080;">$allowMime</span>=<span style="color: #0000ff;">array</span>('image/jpeg','image/png','image/gif'<span style="color: #000000;">)){ </span><span style="color: #800080;">$this</span>->fileName=<span style="color: #800080;">$fileName</span><span style="color: #000000;">; </span><span style="color: #800080;">$this</span>->maxSize=<span style="color: #800080;">$maxSize</span><span style="color: #000000;">; </span><span style="color: #800080;">$this</span>->allowMime=<span style="color: #800080;">$allowMime</span><span style="color: #000000;">; </span><span style="color: #800080;">$this</span>->allowExt=<span style="color: #800080;">$allowExt</span><span style="color: #000000;">; </span><span style="color: #800080;">$this</span>->uploadPath=<span style="color: #800080;">$uploadPath</span><span style="color: #000000;">; </span><span style="color: #800080;">$this</span>->imgFlag=<span style="color: #800080;">$imgFlag</span><span style="color: #000000;">; </span><span style="color: #800080;">$this</span>->fileInfo=<span style="color: #800080;">$_FILES</span>[<span style="color: #800080;">$this</span>-><span style="color: #000000;">fileName]; } </span><span style="color: #008000;">/*</span><span style="color: #008000;">* * 检测上传文件是否出错 * @return boolean </span><span style="color: #008000;">*/</span> <span style="color: #0000ff;">protected</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> checkError(){ </span><span style="color: #0000ff;">if</span>(!<span style="color: #008080;">is_null</span>(<span style="color: #800080;">$this</span>-><span style="color: #000000;">fileInfo)){ </span><span style="color: #0000ff;">if</span>(<span style="color: #800080;">$this</span>->fileInfo['error']>0<span style="color: #000000;">){ </span><span style="color: #0000ff;">switch</span>(<span style="color: #800080;">$this</span>->fileInfo['error'<span style="color: #000000;">]){ </span><span style="color: #0000ff;">case</span> 1: <span style="color: #800080;">$this</span>->error='超过了PHP配置文件中upload_max_filesize选项的值'<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> 2: <span style="color: #800080;">$this</span>->error='超过了表单中MAX_FILE_SIZE设置的值'<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> 3: <span style="color: #800080;">$this</span>->error='文件部分被上传'<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> 4: <span style="color: #800080;">$this</span>->error='没有选择上传文件'<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> 6: <span style="color: #800080;">$this</span>->error='没有找到临时目录'<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> 7: <span style="color: #800080;">$this</span>->error='文件不可写'<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #0000ff;">case</span> 8: <span style="color: #800080;">$this</span>->error='由于PHP的扩展程序中断文件上传'<span style="color: #000000;">; </span><span style="color: #0000ff;">break</span><span style="color: #000000;">; } </span><span style="color: #0000ff;">return</span> <span style="color: #0000ff;">false</span><span style="color: #000000;">; }</span><span style="color: #0000ff;">else</span><span style="color: #000000;">{ </span><span style="color: #0000ff;">return</span> <span style="color: #0000ff;">true</span><span style="color: #000000;">; } }</span><span style="color: #0000ff;">else</span><span style="color: #000000;">{ </span><span style="color: #800080;">$this</span>->error='文件上传出错'<span style="color: #000000;">; </span><span style="color: #0000ff;">return</span> <span style="color: #0000ff;">false</span><span style="color: #000000;">; } } </span><span style="color: #008000;">/*</span><span style="color: #008000;">* * 检测上传文件的大小 * @return boolean </span><span style="color: #008000;">*/</span> <span style="color: #0000ff;">protected</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> checkSize(){ </span><span style="color: #0000ff;">if</span>(<span style="color: #800080;">$this</span>->fileInfo['size']><span style="color: #800080;">$this</span>-><span style="color: #000000;">maxSize){ </span><span style="color: #800080;">$this</span>->error='上传文件过大'<span style="color: #000000;">; </span><span style="color: #0000ff;">return</span> <span style="color: #0000ff;">false</span><span style="color: #000000;">; } </span><span style="color: #0000ff;">return</span> <span style="color: #0000ff;">true</span><span style="color: #000000;">; } </span><span style="color: #008000;">/*</span><span style="color: #008000;">* * 检测扩展名 </span>
Tabellenfeld löschen
Was bedeutet „Hinzufügen' in Java?
Einführung in Streicher
So lösen Sie devc-chinesische verstümmelte Zeichen
Der Unterschied zwischen Javac und Java
So kaufen und verkaufen Sie Bitcoin im Land
So lösen Sie 404 nicht gefunden
Was sind die am häufigsten verwendeten Anweisungen in Vue?
