PHP图片上传 - 痞子鱼
图片上传
Index.php文件代码：
<span style="color: #0000ff;"><span style="color: #ff00ff;">DOCTYPE html</span><span style="color: #0000ff;">></span>
<span style="color: #0000ff;"><span style="color: #800000;">html </span><span style="color: #ff0000;">lang</span><span style="color: #0000ff;">="en"</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;">charset</span><span style="color: #0000ff;">="UTF-8"</span><span style="color: #0000ff;">></span>
<span style="color: #0000ff;"><span style="color: #800000;">title</span><span style="color: #0000ff;">></span>Document<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;">="upload2.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;">="file"</span><span style="color: #ff0000;"> name</span><span style="color: #0000ff;">='file'</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>upload.php代码：
图片上传步骤：
1：接收参数
2：判断错误
3：判断格式是否合法
4：判断文件大小
5：判断是是不是真正的图片
6：判断是否是http post提交
<span style="color: #000000;">php
</span><span style="color: #0000ff;">include</span>('../function.php'<span style="color: #000000;">);
</span><span style="color: #008000;">//</span><span style="color: #008000;">接受参数</span>
<span style="color: #800080;">$file</span>=<span style="color: #800080;">$_FILES</span>['file'<span style="color: #000000;">];
</span><span style="color: #800080;">$name</span>=<span style="color: #800080;">$file</span>['name'<span style="color: #000000;">];
</span><span style="color: #800080;">$type</span>=<span style="color: #800080;">$file</span>['type'<span style="color: #000000;">];
</span><span style="color: #800080;">$tmp_name</span>=<span style="color: #800080;">$file</span>['tmp_name'<span style="color: #000000;">];
</span><span style="color: #800080;">$error</span>=<span style="color: #800080;">$file</span>['error'<span style="color: #000000;">];
</span><span style="color: #800080;">$size</span>=<span style="color: #800080;">$file</span>['size'<span style="color: #000000;">];
</span><span style="color: #800080;">$path</span>='../images/'<span style="color: #000000;">;
</span><span style="color: #008000;">//</span><span style="color: #008000;">判断错误</span>
<span style="color: #0000ff;">if</span>(<span style="color: #800080;">$error</span>==<span style="color: #000000;">UPLOAD_ERR_OK){
</span><span style="color: #008000;">//</span><span style="color: #008000;"> exit('上传成功');
//判断格式是否合法</span>
<span style="color: #800080;">$format</span>=<span style="color: #0000ff;">array</span>('jpeg','jpg','png','gif'<span style="color: #000000;">);
</span><span style="color: #800080;">$ext</span>=format(<span style="color: #800080;">$name</span><span style="color: #000000;">);
</span><span style="color: #0000ff;">if</span>(!<span style="color: #008080;">in_array</span>(<span style="color: #800080;">$ext</span>,<span style="color: #800080;">$format</span><span style="color: #000000;">)){
</span><span style="color: #0000ff;">exit</span>('图片格式不正确'<span style="color: #000000;">);
}
</span><span style="color: #008000;">//</span><span style="color: #008000;">判断文件大小</span>
<span style="color: #800080;">$allowSize</span>=1048576; <span style="color: #008000;">//</span><span style="color: #008000;">1M</span>
<span style="color: #0000ff;">if</span>(<span style="color: #800080;">$size</span>><span style="color: #800080;">$allowSize</span><span style="color: #000000;">){
</span><span style="color: #0000ff;">exit</span>('图片过大'<span style="color: #000000;">);
}
</span><span style="color: #008000;">//</span><span style="color: #008000;">判断是不是图片</span>
<span style="color: #800080;">$imgSize</span>=<span style="color: #008080;">getimagesize</span>(<span style="color: #800080;">$tmp_name</span><span style="color: #000000;">);
</span><span style="color: #0000ff;">if</span>(!<span style="color: #800080;">$imgSize</span><span style="color: #000000;">){
</span><span style="color: #0000ff;">exit</span>('这不是一个图片'<span style="color: #000000;">);
}
</span><span style="color: #008000;">//</span><span style="color: #008000;">判断是不是通过http post上传</span>
<span style="color: #0000ff;">if</span>(<span style="color: #008080;">is_uploaded_file</span>(<span style="color: #800080;">$tmp_name</span><span style="color: #000000;">)){
</span><span style="color: #0000ff;">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;">$path</span>,0777<span style="color: #000000;">);
}
</span><span style="color: #800080;">$newName</span> = getUniqidName().".".<span style="color: #800080;">$Ext</span><span style="color: #000000;">;
</span><span style="color: #800080;">$dstpath</span> = <span style="color: #800080;">$path</span>.'/'.<span style="color: #800080;">$newName</span><span style="color: #000000;">;
</span><span style="color: #0000ff;">if</span>(<span style="color: #008080;">move_uploaded_file</span>(<span style="color: #800080;">$tmp_name</span>,<span style="color: #800080;">$dstpath</span><span style="color: #000000;">)){
</span><span style="color: #0000ff;">echo</span> <span style="color: #800080;">$newName</span><span style="color: #000000;">;
}</span><span style="color: #0000ff;">else</span><span style="color: #000000;">{
</span><span style="color: #0000ff;">exit</span>('图片上传失败'<span style="color: #000000;">);
}
}</span><span style="color: #0000ff;">else</span><span style="color: #000000;">{
</span><span style="color: #0000ff;">exit</span>('不是HTTP POST方式提交'<span style="color: #000000;">);
}
}</span><span style="color: #0000ff;">else</span><span style="color: #000000;">{
</span><span style="color: #0000ff;">switch</span> (<span style="color: #800080;">$error</span><span style="color: #000000;">) {
</span><span style="color: #0000ff;">case</span> '1':
<span style="color: #0000ff;">exit</span>('文件大小超过限定值'<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: #0000ff;">exit</span>('文件大小超过了表单配置大小'<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: #0000ff;">exit</span>('文件只有部分被上传'<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: #0000ff;">exit</span>('没有文件被上传'<span style="color: #000000;">);
</span><span style="color: #0000ff;">break</span><span style="color: #000000;">;
</span><span style="color: #0000ff;">case</span> '6':
<span style="color: #0000ff;">exit</span>('没有找到缓存目录'<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;">exit</span>('目录不可写'<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: #0000ff;">exit</span>('PHP扩展程序阻止了文件上传'<span style="color: #000000;">);
</span><span style="color: #0000ff;">break</span><span style="color: #000000;">;
}
}
</span><span style="color: #008000;">//</span><span style="color: #008000;">取文件后缀函数</span>
<span style="color: #0000ff;">function</span> format(<span style="color: #800080;">$name</span><span style="color: #000000;">){
</span><span style="color: #800080;">$ext</span>=<span style="color: #008080;">explode</span>('.',<span style="color: #800080;">$name</span><span style="color: #000000;">);
</span><span style="color: #800080;">$val</span>=<span style="color: #008080;">end</span>(<span style="color: #800080;">$ext</span><span style="color: #000000;">);
</span><span style="color: #0000ff;">return</span> <span style="color: #800080;">$val</span><span style="color: #000000;">;
}
</span><span style="color: #0000ff;">function</span><span style="color: #000000;"> getUniqidName(){
</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>?>
文件上传
Index.php文件代码：
上传">
upload.php代码：
图片上传步骤：
1：接收参数
2：判断错误
3：判断格式是否合法
4：判断文件大小
5：判断是是不是真正的图片
6：判断是否是http post提交
代码:
include('../function.php');
//接受参数
$file=$_FILES['file'];
$name=$file['name'];
$type=$file['type'];
$tmp_name=$file['tmp_name'];
$error=$file['error'];
$size=$file['size'];
$path='../images/';
//判断错误
if($error==UPLOAD_ERR_OK){
// exit('上传成功');
//判断格式是否合法
$format=array('jpeg','jpg','png','gif');
$ext=format($name);
if(!in_array($ext,$format)){
exit('图片格式不正确');
}
//判断文件大小
$allowSize=1048576; //1M
if($size>$allowSize){
exit('图片过大');
}
//判断是不是图片
$imgSize=getimagesize($tmp_name);
if(!$imgSize){
exit('这不是一个图片');
}
//判断是不是通过http post上传
if(is_uploaded_file($tmp_name)){
if(!file_exists($path)){
mkdir($path,0777,true);
chmod($path,0777);
}
$newName = getUniqidName().".".$Ext;
$dstpath = $path.'/'.$newName;
if(move_uploaded_file($tmp_name,$dstpath)){
echo $newName;
}else{
exit('图片上传失败');
}
}else{
exit('不是HTTP POST方式提交');
}
}else{
switch ($error) {
case '1':
exit('文件大小超过限定值');
break;
case '2':
exit('文件大小超过了表单配置大小');
break;
case '3':
exit('文件只有部分被上传');
break;
case '4':
exit('没有文件被上传');
break;
case '6':
exit('没有找到缓存目录');
break;
case '7':
exit('目录不可写');
break;
case '8':
exit('PHP扩展程序阻止了文件上传');
break;
}
}
//取文件后缀函数
function format($name){
$ext=explode('.',$name);
$val=end($ext);
return $val;
}
function getUniqidName(){
return md5(uniqid(microtime(true),true));
}
?>
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