实战PHP上传文件代码演示

PHP经过长时间的发展，很多用户都很了解PHP了，这里我发表一下PHP上传文件代码，和大家讨论讨论。PHP本身是一种简单而强大的语言。PHP语言拥有核心特性如强大的字符串和数组处理能力，同时极大的改进了对面向对象编程的支持（PHP5以上版本）。通过使用标准的和可选的扩展模块，PHP应用程序可以连接MySQL或Oracle等十几种数据库、绘图、创建PDF文件和创建解析XML文件。你也可以使用C语言来写自己的PHP扩展模块。

例如，在已存在的代码库中提供一个PHP的接口函数。你也可以在Windows下运行PHP，使用COM控制其它诸如Word和Excel的Windows应用程序，或者使用ODBC来连接数据库。在国内，PHP曾经和微软的ASP并驾齐驱，是大家常用的网络编程语言。　ASP3.0现在早已经被微软放弃了，不再更新，也许有人会认为：PHP应该也是个快作古的东西了吧？然而事实恰恰相反，PHP不仅在高速发展，把ASP远远抛在身后，而且渐渐成为现在互联网上使用最为广泛、最热门的语言。

PHP上传文件代码

<ol class="dp-xml">
<li class="alt"><span><span class="tag"><span class="tag-name">html</span><span class="tag">></span><span class="tag"><span class="tag-name">head</span><span class="tag">></span><span> </span></span><li class="">
<span></span><span class="tag"><span class="tag-name">title</span><span class="tag">></span><span>上载文件表单</span><span class="tag"></span><span class="tag-name">title</span><span class="tag">></span><span class="tag"></span><span class="tag-name">head</span><span class="tag">></span><span>   </span></span>
</li>
<li class="alt">
<span></span><span class="tag"><span class="tag-name">body</span><span class="tag">></span><span>   </span></span>
</li>
<li class="">
<span></span><span class="tag"><span class="tag-name">form</span><span> </span><span class="attribute">enctype</span><span>=</span><span class="attribute-value">"multipart/form-data"</span><span> </span><span class="attribute">action</span><span>=</span><span class="attribute-value">""</span><span> </span><span class="attribute">method</span><span>=</span><span class="attribute-value">"post"</span><span class="tag">></span><span>   </span></span>
</li>
<li class="alt">
<span>请选择文件： </span><span class="tag"><span class="tag-name">br</span><span class="tag">></span><span> </span></span>
</li>
<li class="">
<span></span><span class="tag"><span class="tag-name">input</span><span> </span><span class="attribute">name</span><span>=</span><span class="attribute-value">"upload_file"</span><span> </span><span class="attribute">type</span><span>=</span><span class="attribute-value">"file"</span><span class="tag">></span><span class="tag"><span class="tag-name">br</span><span class="tag">></span><span> </span></span><li class="alt">
<span></span><span class="tag"><span class="tag-name">input</span><span> </span><span class="attribute">type</span><span>=</span><span class="attribute-value">"submit"</span><span> </span><span class="attribute">value</span><span>=</span><span class="attribute-value">"上传文件"</span><span class="tag">></span><span>   </span></span>
</li>
<li class="">
<span></span><span class="tag"></span><span class="tag-name">form</span><span class="tag">></span><span>   </span>
</li></span>
</li>
<li class="alt">
<span></span><span class="tag"></span><span class="tag-name">body</span><span class="tag">></span><span> </span>
</li></span><li class="">
<span></span><span class="tag"></span><span class="tag-name">html</span><span class="tag">></span><span>   </span>
</li></span></li>
<li class="alt">
<span></span><span class="tag"></span><span> </span>
</li>
<li class="">
<span>$</span><span class="attribute">upload_file</span><span>=$_FILES['upload_file']['tmp_name'];  </span>
</li>
<li class="alt">
<span>$</span><span class="attribute">upload_file_name</span><span>=$_FILES['upload_file']['name'];  </span>
</li>
<li class=""><span> </span></li>
<li class="alt"><span>if($upload_file){  </span></li>
<li class="">
<span>$</span><span class="attribute">file_size_max</span><span> = </span><span class="attribute-value">1000</span><span>*1000;// 1M限制文件上传最大容量(bytes)  </span>
</li>
<li class="alt">
<span>$</span><span class="attribute">store_dir</span><span> = </span><span class="attribute-value">"d:/"</span><span>;// 上传文件的储存位置  </span>
</li>
<li class="">
<span>$</span><span class="attribute">accept_overwrite</span><span> = </span><span class="attribute-value">1</span><span>;//是否允许覆盖相同文件  </span>
</li>
<li class="alt"><span>// 检查文件大小  </span></li>
<li class="">
<span>if ($upload_file_size </span><span class="tag">></span><span> $file_size_max) {  </span>
</li>
<li class="alt"><span>echo "对不起，你的文件容量大于规定";  </span></li>
<li class=""><span>exit;  </span></li>
<li class="alt"><span>}  </span></li>
<li class=""><span> </span></li>
<li class="alt"><span>// 检查读写文件  </span></li>
<li class=""><span>if (file_exists($store_dir . $upload_file_name) && !$accept_overwrite) {  </span></li>
<li class="alt"><span>Echo "存在相同文件名的文件";  </span></li>
<li class=""><span>exit;  </span></li>
<li class="alt"><span>}  </span></li>
<li class=""><span> </span></li>
<li class="alt"><span>//复制文件到指定目录  </span></li>
<li class=""><span>if (!move_uploaded_file($upload_file,$store_dir.$upload_file_name)) {  </span></li>
<li class="alt"><span>echo "复制文件失败";  </span></li>
<li class=""><span>exit;  </span></li>
<li class="alt"><span>}  </span></li>
<li class=""><span> </span></li>
<li class="alt"><span>}  </span></li>
<li class=""><span> </span></li>
<li class="alt">
<span>Echo "</span><span class="tag"><span class="tag-name">p</span><span class="tag">></span><span>你上传了文件:";  </span></span>
</li>
<li class=""><span>echo$_FILES['upload_file']['name'];  </span></li>
<li class="alt">
<span>echo "</span><span class="tag"><span class="tag-name">br</span><span class="tag">></span><span>";  </span></span>
</li>
<li class=""><span>//客户端机器文件的原名称。   </span></li>
<li class="alt"><span> </span></li>
<li class=""><span>Echo "文件的 MIME 类型为:";  </span></li>
<li class="alt"><span>echo $_FILES['upload_file']['type'];  </span></li>
<li class=""><span>//文件的 MIME 类型，需要浏览器提供该信息的支持，例如“image/gif”。   </span></li>
<li class="alt">
<span>echo "</span><span class="tag"><span class="tag-name">br</span><span class="tag">></span><span>";  </span></span>
</li>
<li class=""><span> </span></li>
<li class="alt"><span>Echo "上传文件大小:";  </span></li>
<li class=""><span>echo $_FILES['upload_file']['size'];  </span></li>
<li class="alt"><span>//已上传文件的大小，单位为字节。   </span></li>
<li class="">
<span>echo "</span><span class="tag"><span class="tag-name">br</span><span class="tag">></span><span>";  </span></span>
</li>
<li class="alt"><span> </span></li>
<li class=""><span>Echo "文件上传后被临时储存为:";  </span></li>
<li class="alt"><span>echo $_FILES['upload_file']['tmp_name'];  </span></li>
<li class=""><span>//文件被上传后在服务端储存的临时文件名。   </span></li>
<li class="alt">
<span>echo "</span><span class="tag"><span class="tag-name">br</span><span class="tag">></span><span>";  </span></span>
</li>
<li class=""><span> </span></li>
<li class="alt"><span> </span></li>
<li class="">
<span>$</span><span class="attribute">Erroe</span><span>=$_FILES['upload_file']['error'];  </span>
</li>
<li class="alt"><span>switch($Erroe){  </span></li>
<li class=""><span>case 0:  </span></li>
<li class="alt"><span>Echo "上传成功"; break;  </span></li>
<li class=""><span>case 1:  </span></li>
<li class="alt"><span>Echo "上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值."; break;  </span></li>
<li class=""><span>case 2:  </span></li>
<li class="alt"><span>Echo "上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值。";break;  </span></li>
<li class=""><span>case 3:  </span></li>
<li class="alt"><span>Echo "文件只有部分被上传";break;  </span></li>
<li class=""><span>case 4:  </span></li>
<li class="alt"><span>Echo "没有文件被上传";break;  </span></li>
<li class=""><span>}  </span></li>
<li class="alt">
<span></span><span class="tag">?></span><span> </span>
</li>
</ol>

以上就是详细的PHP上传文件代码，希望对大家有帮助。