PHP文件上传小程序适合初学者学习!

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"];
  }
}
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以上就是本文的全部内容，希望对大家的学习有所帮助。

PHP文件上传小程序 适合初学者学习!

PHP文件上传小程序适合初学者学习!