多文件上传类【文件类型严格验证】

<?php/*多文件上传类修改：Linvo 2008-2-15*/class more_file_upload{const FILE_PATH='../upfileclass/uploadfile/';var $file_type;var $file_type_array;var $file_type_real_array;var $file_type_string;var $file_name;var $file_size;var $file_tmp_name;var $file_error;var $handledate;static $totalsize=0; function __construct($file_name,$file_error,$file_size,$file_tmp_name,$file_type){ $this->handledate=date('m-d-Y');if (!empty($file_name)){$this->file_name = $file_name;$this->file_error = $file_error;$this->file_size = $file_size;$this->file_tmp_name = $file_tmp_name;$this->file_type = $file_type;$this->file_type_array = array('/', 'image/gif', 'image/jpg', 'image/jpeg', 'image/pjpeg', 'image/png');$this->file_type_real_array = array(0.1, 'jpg'=>74707370, 'gif'=>7173, 'bmp'=>6677, 'png'=>807871); $this->show_execute_message($this->file_error,$this->file_name,$this->file_type,$this->file_size);}} function __destruct(){$this->file_name = NULL;$this->file_error = NULL;$this->file_size = NULL;$this->file_tmp_name = NULL;$this->file_type = NULL;self::$totalsize = 0;} function show_execute_message($smfileerror,$smfilename,$smfiletype,$smfilesize){if($smfileerror>0){switch ($smfileerror){case 1: $smfilemessage='<b>文件超过服务器的约定大小！</b>';break;case 2: $smfilemessage='<b>文件超过指定的文件大小！</b>';break;case 3: $smfilemessage='<b>文件只上传了部分！</b>';break;case 4: echo "$this->file_name ".'文件上传失败！<br/>';break;}self::__destruct(); }else{$smfiletypeflag = array_search($smfiletype,$this->file_type_array); //进行真实格式验证if($smfiletypeflag != false){$file = fopen($this->file_tmp_name, "rb");$bin = fread($file, 10);fclose($file);$strInfo = @unpack("c10chars", $bin);$typeCode = intval($strInfo['chars1'].$strInfo['chars2']);$smfiletypeflag = array_search($typeCode, $this->file_type_real_array);if($smfiletypeflag == false){ //判断是否是png图片$typeCode = intval($strInfo['chars2'].$strInfo['chars3'].$strInfo['chars4']);$smfiletypeflag = array_search($typeCode, $this->file_type_real_array);if($smfiletypeflag == false){ //判断是否是jpg图片$typeCode = intval($strInfo['chars7'].$strInfo['chars8'].$strInfo['chars9'].$strInfo['chars10']);$smfiletypeflag = array_search($typeCode, $this->file_type_real_array);}}} if($smfiletypeflag == false){$smfilemessage='<b>文件类型不对，请核实！</b>';self::__destruct();}else{$resflag = $this->move_file($this->file_tmp_name,$this->file_name);if ($resflag == 1){$smfilemessage = '文件上传成功！';self::$totalsize += intval($smfilesize);self::__destruct();}else{$smfilemessage = '<b>文件上传失败！</b>';self::__destruct();}}} $smfilesizeformat = $this->size_BKM($smfilesize);echo '<tr><td align="left" >'.$smfilename.'</td> <td align="center" >'.$smfiletype.'</td> <td align="center" >'.$smfilesizeformat.'</td> <td align="center" >'.$smfilemessage.'</td></tr>';} function move_file($mvfiletmp,$mvfilename){ //移动文件$mvfilenamearr = explode('.',basename($mvfilename));$mvfilenamearr[0] = $this->rand_string();$mvfilename = implode('.',$mvfilenamearr); if (is_uploaded_file($mvfiletmp)){$uploadfile = self::FILE_PATH."$mvfilename";$result = move_uploaded_file($mvfiletmp,$uploadfile);return $result;}} function rand_string(){$string = md5(uniqid(rand().microtime())); return $string;} function size_BKM($size){ // B/KB/MB单位转换if($size < 1024) {$size_BKM = (string)$size . " B";} elseif($size < (1024 * 1024)) {$size_BKM = number_format((double)($size / 1024), 1) . " KB";}else { $size_BKM = number_format((double)($size / (1024*1024)),1)." MB"; } return $size_BKM;}}?>