一个非常实用的php文件上传类

 rand_name = $rand_name; $this->save_path = $save_path; $this->allow_type = $this->get_allow_type($allow_type); } /** * 上传文件 * 在上传文件前要做的工作 * (1) 获取文件所有信息 * (2) 判断上传文件是否合法 * (3) 设置文件存放路径 * (4) 是否重命名 * (5) 上传完成 * @param array $file 上传文件 *     $file须包含$file['name'], $file['size'], $file['error'], $file['tmp_name'] */ public function upload_file($file){ //$this->file   = $file; $this->file_name   = $file['name']; $this->file_size   = $file['size']; $this->error     = $file['error']; $this->file_tmp_name = $file['tmp_name']; $this->ext = $this->get_file_type($this->file_name); switch($this->error){ case 0: $this->msg = ''; break; case 1: $this->msg = '超出了php.ini中文件大小'; break; case 2: $this->msg = '超出了MAX_FILE_SIZE的文件大小'; break; case 3: $this->msg = '文件被部分上传'; break; case 4: $this->msg = '没有文件上传'; break; case 5: $this->msg = '文件大小为0'; break; default: $this->msg = '上传失败'; break; } if($this->error==0 && is_uploaded_file($this->file_tmp_name)){ //检测文件类型 if(in_array($this->ext, $this->allow_type)==false){ $this->msg = '文件类型不正确'; return false; } //检测文件大小 if($this->file_size > $this->max_size){ $this->msg = '文件过大'; return false; } } $this->set_file_name(); $this->uploaded = $this->save_path.$this->new_name; if(move_uploaded_file($this->file_tmp_name, $this->uploaded)){ $this->msg = '文件上传成功'; return true; }else{ $this->msg = '文件上传失败'; return false; } } /** * 设置上传后的文件名 * 当前的毫秒数和原扩展名为新文件名 */ public function set_file_name(){ if($this->rand_name==true){ $a = explode(' ', microtime()); $t = $a[1].($a[0]*1000000); $this->new_name = $t.'.'.($this->ext); }else{ $this->new_name = $this->file_name; } } /** * 获取上传文件类型 * @param string $filename 目标文件 * @return string $ext 文件类型 */ public function get_file_type($filename){ $ext = pathinfo($filename, PATHINFO_EXTENSION); return $ext; } /** * 获取可上传文件的类型 */ public function get_allow_type($allow_type){ $s = array(); if(is_arra<mark style="color:transparent">来源gaodaimacom搞#^代%!码网</mark>y($allow_type)){ foreach($allow_type as $value){ $s[] = $value; } }else{ $s = preg_split("/[\s,|;]+/", $allow_type); } return $s; } //获取错误信息 public function get_msg(){ return $this->msg; } } ?>

   <title>upfile</title>  0){ echo "Error: " . $_FILES["file"]["error"] . "<br />"; }else{ $file = $_FILES['file']; $upload = new UploadFile(true, './images/', array('jpg', 'jpeg', 'png')); $upload->upload_file($file); echo $upload->get_msg(); } }else{ ?>