PHP file upload class example

This article mainly introduces PHP file upload class examples. Interested friends can refer to it. I hope it will be helpful to everyone.

The following is the code to share with you:

_filedir = is_dir($filedir) ? $filedir : ''; if(empty($file) || !isset($file['size']) || $file['size'] == 0) $this->error(NO_FILE); $this->_filesize = $file['size']; $this->_filename = $file['name']; $this->_filetmpname = $file['tmp_name']; $this->allowsize = $allowsize; $this->allowext = $allowext; $this->neednewname = ($neednewname) ? true : false; $this->newname = ''; $this->report = $report; } function do_upload(){ if(!is_uploaded_file($this->_filetmpname)) $this->error(NO_FILE); if($this->chk_ext()){ $this->error(NOT_ALLOW_EXT); return ''; } if($this->chk_size()){ $this->error(NOT_ALLOW_SIZE); return ''; } if($this->neednewname) $this->newname = $this->generate_name().".".$this->get_fileext(); if($this->chk_hasfile()){ $this->error(HAS_THE_FILE); return ''; } $filename = empty($this->newname) ? @iconv('utf-8','gb2312',$this->_filename) : $this->newname; @chmod($this->_filedir.$filename, 0777); if(move_uploaded_file($this->_filetmpname, $this->_filedir.$filename)){ return $this->result(); }else{ $this->error(UPLOAD_FAILED); return ''; } } function chk_ext(){ if(empty($this->allowext) || in_array($this->get_fileext(), explode("|",$this->allowext))) return false; return true; } function chk_size(){ if(empty($this->allowsize) || get_filesize <= $this->allowsize*1024*1024) return false; return true; } function get_filesize(){ return $this->_filesize; } function get_fileext(){ return substr($this->_filename,strrpos($this->_filename,".")+1); } function generate_name(){ return substr(md5(time()),26); } function chk_hasfile(){ return is_file($this->_filedir.$this->_filename); } function error($tip){ echo $tip; } function result(){ if($this->report){ $filename = empty($this->newname) ? $this->_filename : $this->newname; $arr = array('filename' => $filename, 'filesize' => $this->_filesize, 'tip' => UPLOAD_SUCCESS); return $arr; }else{ return UPLOAD_SUCCESS; } } } /***使用方法与参数说明***/ /*** 第一个参数$dir 为上传文件存放的路径 第二个参数为$_FILES 为你那个上传文件变量 第三个参数允许文件大小 单位为MB 第四个参数允许的文件类型 格式为jpg|png|gif 第五个参数是否需要生成新的文件名 第六个参数为返回的提示格式 0为直接提示上传正确 1则返回一个数组array('filename' => $filename, 'filesize' => $this->_filesize, 'tip' => UPLOAD_SUCCESS); ***/ //require("类文件"); //$u = new file_uploader; //$u->ready($dir, $_FILES['upload_file'], false, false, true, 0); //echo $u->do_upload(); ?>

Calling method
The code is as follows

$dir = 'upload/'; require("upload_class.php"); $u = new file_uploader; $u->ready($dir, $_FILES['upload_file'], false, false, true, 0); echo $u->do_upload();

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