本文实例为大家分享了PHP文件上传小程序的具体代码，供大家参考，具体内容如下
废话略过，直接上代码：
首先前端代码：index.html
<html> <head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>文件上传Demo</title> </head> <body> <form method="post" action="upload.php" enctype="multipart/form-data"> <table border=0 cellspacing=0 cellpadding=0 align=center width="100%"> <tr> <td width=55 height=20 align="center"> <input type="hidden" name="MAX_FILE_SIZE" value="2000000">文件： </td> <td height="16"> <input name="file" type="file" value="浏览" /> <input type="submit" value="上传" name="submit" /> </td> </tr> </table> </form> </body> </html>
接下来是重点：upload.php
<?php
/**
* @title 文件上传示例
* @author FeoniX
*/
header("Content-Type:text/html; charset=utf-8");
if($_POST['submit']){
$upfiles = new Upload();
$upfiles->upload_file();
}
class Upload{
public $upload_name; //上传文件名
public $upload_tmp_name; //上传临时文件名
public $upload_final_name; //上传文件的最终文件名
public $upload_target_dir; //文件被上传到的目标目录
public $upload_target_path; //文件被上传到的最终路径
public $upload_filetype ; //上传文件类型
public $allow_uploadedfile_type;//允许的上传文件类型
public $upload_file_size; //上传文件的大小
public $allow_uploaded_maxsize=10000000;//允许上传文件的最大值
//构造函数
public function __construct()
{
$this->upload_name = $_FILES["file"]["name"]; //取得上传文件名
$this->upload_filetype = $_FILES["file"]["type"];
$this->upload_tmp_name = $_FILES["file"]["tmp_name"];
$this->allow_uploadedfile_type = array('jpeg','jpg','png','gif','bmp','doc','xls','csv','zip','rar','txt','wps');
$this->upload_file_size = $_FILES["file"]["size"];
$this->upload_target_dir="./upload";
}
//文件上传
public function upload_file()
{
$upload_filetype = $this->getFileExt($this->upload_name);//获取文件扩展名
if(in_array($upload_filetype,$this->allow_uploadedfile_type))//判断文件类型是否符合要求
{
if($this->upload_file_size < $this->allow_uploaded_maxsize)//判断文件大小是否超过允许的最大值
{
if(!is_dir($this->upload_target_dir))//如果文件上传目录不存在
{
mkdir($this->upload_target_dir);//创建文件上传目录
chmod($this->upload_target_dir,0777);//改权限
}
$this->upload_final_name = date("YmdHis").rand(0,100).'.'.$upload_filetype;//生成随机文件名
$this->upload_target_path = $this->upload_target_dir."/".$this->upload_final_name;//文件上传目标目录
if(!move_uploaded_file($this->upload_tmp_name,$this->upload_target_path))//文件移动失败
{
echo "<font color=red>文件上传失败！</font>";
}
else
{
echo "<font color=green>文件上传成功！</font>";
}
}
else
{
echo("<font color=red>文件太大,上传失败！</font>");
}
}
else
{
echo("<font color=red>仅支持一下文件类型，请重新选择：<br>".implode('，',$this->allow_uploadedfile_type)."</font>");
}
}
/**
*获取文件扩展名
*@param String $filename 要获取文件名的文件
*/
public function getFileExt($filename){
$info = pathinfo($filename);
return @$info["extension"];
}
}
?>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
