PHP encapsulated single file upload class-PHP Tutorial-php.cn

PHP encapsulated single file upload class

墨辰丷

Release： 2023-03-28 17:18:02

Original

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This article mainly introduces the single file (image) upload class encapsulated by PHP, and analyzes the related processing skills of PHP image file upload operation in the form of a complete example. Friends in need can refer to it.

The details are as follows ：

<?php
//封装php中的单文件(图片)上传类
/*
//参数1：$file 文件数组 5个属性值 name,type,size,tmp,error
//参数2：文件保存的路径$path
//参数3：文件上传允许的类型 $allow数组  $allow=array(&#39;image/jpeg&#39;,&#39;image/jpg&#39;,&#39;image/png&#39;,&#39;image/gif&#39;)
//参数4: 允许文件上传的最大大小 $size
//返回值: return $imageName文件的名字
*/
header(&#39;content-type:text/html;charset=utf-8&#39;);
class Upload{
   //定义一个属性，专门保存错误信息
    public static $error;
   //文件转移的方法
  public function uploadFile($file,$size,$path){
    if(!is_dir($path)){
     $this->mkPath($path);
    }
    $allow=array(&#39;image/jpeg&#39;,&#39;image/jpg&#39;,&#39;image/png&#39;,&#39;image/gif&#39;);
   //首先判断文件是否已上传到临时目录
    if(!is_array($file)){
     Upload::$error=&#39;不是一个有效的文件&#39;;
     return false;
    }
   //判断文件是否上传到临时目录成功
   switch($file[&#39;error&#39;]){
    case 1:
      Upload::$error=&#39;上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值。&#39;;
      return false;
    case 2:
      Upload::$error=&#39;上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值。&#39;;
      return false;
    case 3:
      Upload::$error=&#39;文件只有部分被上传&#39;;
      return false;
    case 4:
      Upload::$error=&#39;没有文件被上传&#39;;
       return false;
    case 6:
      Upload::$error=&#39;找不到临时文件夹&#39;;
      return false;
    case 7:
       Upload::$error=&#39;文件写入失败&#39;;
       return false;
   }
   //判断文件类型是否是图片
    if(!in_array($file[&#39;type&#39;],$allow)){
     Upload::$error=&#39;不是要求的文件类型&#39;;
     return false;
    }
   //判断文件的大小是否在允许的范围内
    if($file[&#39;size&#39;]>$size){
     Upload::$error=&#39;超出允许最大文件大小&#39;;
     return false;
    }
    //文件转移
    if(move_uploaded_file($file[&#39;tmp_name&#39;],$path.&#39;/&#39;.$this->getName($file))){
     return $file[&#39;name&#39;];
    }else{
     return Upload::$error;
    }
  }
  //创建目录的方法
    private function mkPath($path){
    mkdir($path);
  }
  //文件重命名
    private function getName($file){
     return time().$file[&#39;name&#39;];
    }
}

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