本文实例讲述了php文件上传类。分享给大家供大家参考，具体如下：
/**$file=new class_file($file_array,"flash/"); $file->set_allow_type(array("jpg","jpeg","gif")); $file->is_limit_size(); if(!$file->allow_file_size()){ echo $file->error; exit; } if(!$file->allow_file_type()){ echo $file->error; exit(); }else if(!$file->uploadfile()){ echo $file->error; exit; }**/<?php class class_file{ private $file_type; private $file_size; private $save_path; private $file_path; private $allow_type=array(); private $allow_size; private $file_name; private $flag=false; private $mime_type; private $is_limit_size=false; public $error; //构造函数 function class_file($file_array,$save_path){ $this->file_path=$file_array['tmp_name']; $this->file_size=$file_array['size']; $this->file_type=$file_array['type']; $this->save_path=$save_path; } //设置允许的文件类型 function set_allow_type($allow_type){ $this->allow_type=$allow_type; } //设置允许的文件大小 function set_allow_size($allow_size){ $this->allow_size=$allow_size; } //文件上传 public function uploadfile(){ if(!$this->allow_file_type()){ $this->file_name(); } if(move_uploaded_file($this->file_path,$this->save_path.$this->file_name)){ return true; }else{ $this->error="文件上传失败"; return; } }//判断文件上传的类型 function allow_file_type(){ $this->file_name(); if(in_array($this->mime_type,$this->allow_type)){ return true; }else{ $this->error="不允许上传的类型"; exit(); } } //判断文件上传的大小 function allow_file_size($size=100){ if($this->is_limit_size){ $this->set_allow_size($size); if($this->allow_size>=$this->file_size){ return true; }else{ $this->error="超过文件上传大小限制"; } } } //是否限制文件大小 function is_limit_size(){ $this->is_limit_size=true; }//文件类型和文件名称 function file_name(){ $this->mime_type=substr($this->file_type,strpos($this->file_type,"/")+1); if($this->mime_type=="pjpeg"){ $this->mime_type="jpg"; } if($this->mime_type=="x-ms-wma"){ $this->mime_type="wma"; } if($this->mime_type=="x-ms-wmv"){ $this->mime_type="wmv"; } $this->file_name=date("YmdHis").".$this->mime_type"; } function _get_file_name(){ return $this->file_name; } }?> 
