PHP encapsulated single file upload class

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;];
    }
}

Summary: The above is the entire content of this article, I hope it will be helpful to everyone's study.

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