php文件處理類

//-------------------------------------
//-------------------------------------
class upload {
??? var $dir;???????????? //附件存放物理目錄
??? var $time;???????????? //自定義文件上傳時間
??? var $allow_types;???? //允許上傳附件類型
??? var $field;???????????? //上傳控件名稱
??? var $maxsize;???????? //最大允許文件大小，單位為KB
??? var $thumb_width;??? //縮略圖寬度
??? var $thumb_height;?? //縮略圖高度
??? var $watermark_file; //水印圖片地址
??? var $watermark_pos;? //水印位置
??? var $watermark_trans;//水印透明度
??? //構(gòu)造函數(shù)
??? //$types : 允許上傳的文件類型 , $maxsize : 允許大小 ,? $field : 上傳控件名稱 , $time : 自定義上傳時間
??? function upload($types = 'jpg|png', $maxsize = 1024, $field = 'attach', $time = '') {
??????? $this->allow_types = explode('|',$types);
??????? $this->maxsize = $maxsize * 1024;
??????? $this->field = $field;
??????? $this->time = $time ? $time : time();
??? }
??? //設(shè)置并創(chuàng)建文件具體存放的目錄
??? //$basedir? : 基目錄，必須為物理路徑
??? //$filedir? : 自定義子目錄，可用參數(shù){y}、{m}、377j5v51b
??? function set_dir($basedir,$filedir = '') {
??????? $dir = $basedir;
??????? !is_dir($dir) && @mkdir($dir,0777);
??????? if (!empty($filedir)) {
??????????? $filedir = str_replace(array('{y}','{m}','{y}'),array(date('Y',$this->time),date('m',$this->time),date('d',$this->time)),strtolower($filedir));
??????????? $dirs = explode('/',$filedir);
??????????? foreach ($dirs as $d) {
??????????????? !empty($d) && $dir .= $d.'/';
??????????????? !is_dir($dir) && @mkdir($dir,0777);
??????????? }
??????? }
??????? $this->dir = $dir;
??? }
??? //圖片縮略圖設(shè)置，如果不生成縮略圖則不用設(shè)置
??? //$width : 縮略圖寬度 , $height : 縮略圖高度
??? function set_thumb ($width = 0, $height = 0) {
??????? $this->thumb_width? = $width;
??????? $this->thumb_height = $height;
??? }
??? //圖片水印設(shè)置，如果不生成添加水印則不用設(shè)置
??? //$file : 水印圖片 , $pos : 水印位置 , $trans : 水印透明度
??? function set_watermark ($file, $pos = 6, $trans = 80) {
??????? $this->watermark_file? = $file;
??????? $this->watermark_pos?? = $pos;
??????? $this->watermark_trans = $trans;
??? }
??? /*----------------------------------------------------------------
??? 執(zhí)行文件上傳，處理完返回一個包含上傳成功或失敗的文件信息數(shù)組，
??? 其中：name 為文件名，上傳成功時是上傳到服務(wù)器上的文件名，上傳失敗則是本地的文件名
????????? dir? 為服務(wù)器上存放該附件的物理路徑，上傳失敗不存在該值
????????? size 為附件大小，上傳失敗不存在該值
????????? flag 為狀態(tài)標(biāo)識，1表示成功，-1表示文件類型不允許，-2表示文件大小超出
??? -----------------------------------------------------------------*/
??? function execute() {
??????? $files = array(); //成功上傳的文件信息
??????? $field = $this->field;
??????? $keys = array_keys($_FILES[$field]['name']);
??????? foreach ($keys as $key) {
??????????? if (!$_FILES[$field]['name'][$key]) continue;
???????????
??????????? $fileext = $this->fileext($_FILES[$field]['name'][$key]); //獲取文件擴展名
??????????? $filename = $this->time.mt_rand(100,999).'.'.$fileext; //生成文件名
??????????? $filedir = $this->dir;??? //附件實際存放目錄
??????????? $filesize = $_FILES[$field]['size'][$key]; //文件大小
???????????
??????????? //文件類型不允許
??????????? if (!in_array($fileext,$this->allow_types)) {
??????????????? $files[$key]['name'] = $_FILES[$field]['name'][$key];
??????????????? $files[$key]['flag'] = -1;
??????????????? continue;
??????????? }
??????????? //文件大小超出
??????????? if ($filesize > $this->maxsize) {
??????????????? $files[$key]['name'] = $_FILES[$field]['name'][$key];
??????????????? $files[$key]['flag'] = -2;
??????????????? continue;
??????????? }
??????????? $files[$key]['name'] = $filename;
??????????? $files[$key]['dir'] = $filedir;
??????????? $files[$key]['size'] = $filesize;
??????????? //保存上傳文件并刪除臨時文件
??????????? if (is_uploaded_file($_FILES[$field]['tmp_name'][$key])) {
??????????????? move_uploaded_file($_FILES[$field]['tmp_name'][$key],$filedir.$filename);
??????????????? @unlink($_FILES[$field]['tmp_name'][$key]);
??????????????? $files[$key]['flag'] = 1;
??????????????? //對圖片進行加水印和生成縮略圖
??????????????? if (in_array($fileext,array('jpg','png','gif'))) {
??????????????????? if ($this->thumb_width) {
??????????????????????? if ($this->create_thumb($filedir.$filename,$filedir.'thumb_'.$filename)) {
??????????????????????????? $files[$key]['thumb'] = 'thumb_'.$filename;? //縮略圖文件名
??????????????????????? }
??????????????????? }
??????????????????? $this->create_watermark($filedir.$filename);
??????????????? }
??????????? }
??????? }
??????? return $files;
??? }
??? //創(chuàng)建縮略圖,以相同的擴展名生成縮略圖
??? //$src_file : 來源圖像路徑 , $thumb_file : 縮略圖路徑
??? function create_thumb ($src_file,$thumb_file) {
??????? $t_width? = $this->thumb_width;
??????? $t_height = $this->thumb_height;
??????? if (!file_exists($src_file)) return false;
??????? $src_info = getImageSize($src_file);
??????? //如果來源圖像小于或等于縮略圖則拷貝源圖像作為縮略圖
??????? if ($src_info[0] ??????????? if (!copy($src_file,$thumb_file)) {
??????????????? return false;
??????????? }
??????????? return true;
??????? }
??????? //按比例計算縮略圖大小
??????? if ($src_info[0] - $t_width > $src_info[1] - $t_height) {
??????????? $t_height = ($t_width / $src_info[0]) * $src_info[1];
??????? } else {
??????????? $t_width = ($t_height / $src_info[1]) * $src_info[0];
??????? }
??????? //取得文件擴展名
??????? $fileext = $this->fileext($src_file);
??????? switch ($fileext) {
??????????? case 'jpg' :
??????????????? $src_img = ImageCreateFromJPEG($src_file); break;
??????????? case 'png' :
??????????????? $src_img = ImageCreateFromPNG($src_file); break;
??????????? case 'gif' :
??????????????? $src_img = ImageCreateFromGIF($src_file); break;
??????? }
??????? //創(chuàng)建一個真彩色的縮略圖像
??????? $thumb_img = @ImageCreateTrueColor($t_width,$t_height);
??????? //ImageCopyResampled函數(shù)拷貝的圖像平滑度較好，優(yōu)先考慮
??????? if (function_exists('imagecopyresampled')) {
??????????? @ImageCopyResampled($thumb_img,$src_img,0,0,0,0,$t_width,$t_height,$src_info[0],$src_info[1]);
??????? } else {
??????????? @ImageCopyResized($thumb_img,$src_img,0,0,0,0,$t_width,$t_height,$src_info[0],$src_info[1]);
??????? }
??????? //生成縮略圖
??????? switch ($fileext) {
??????????? case 'jpg' :
??????????????? ImageJPEG($thumb_img,$thumb_file); break;
??????????? case 'gif' :
??????????????? ImageGIF($thumb_img,$thumb_file); break;
??????????? case 'png' :
??????????????? ImagePNG($thumb_img,$thumb_file); break;
??????? }
??????? //銷毀臨時圖像
??????? @ImageDestroy($src_img);
??????? @ImageDestroy($thumb_img);
??????? return true;
??? }
??? //為圖片添加水印
??? //$file : 要添加水印的文件
??? function create_watermark ($file) {
??????? //文件不存在則返回
??????? if (!file_exists($this->watermark_file) || !file_exists($file)) return;
??????? if (!function_exists('getImageSize')) return;
???????
??????? //檢查GD支持的文件類型
??????? $gd_allow_types = array();
??????? if (function_exists('ImageCreateFromGIF')) $gd_allow_types['image/gif'] = 'ImageCreateFromGIF';
??????? if (function_exists('ImageCreateFromPNG')) $gd_allow_types['image/png'] = 'ImageCreateFromPNG';
??????? if (function_exists('ImageCreateFromJPEG')) $gd_allow_types['image/jpeg'] = 'ImageCreateFromJPEG';
??????? //獲取文件信息
??????? $fileinfo = getImageSize($file);
??????? $wminfo?? = getImageSize($this->watermark_file);
??????? if ($fileinfo[0] ??????? if (array_key_exists($fileinfo['mime'],$gd_allow_types)) {
??????????? if (array_key_exists($wminfo['mime'],$gd_allow_types)) {
???????????????
??????????????? //從文件創(chuàng)建圖像
??????????????? $temp = $gd_allow_types[$fileinfo['mime']]($file);
??????????????? $temp_wm = $gd_allow_types[$wminfo['mime']]($this->watermark_file);
??????????????? //水印位置
??????????????? switch ($this->watermark_pos) {???????????????
??????????????????? case 1 :? //頂部居左
??????????????????????? $dst_x = 0; $dst_y = 0; break;???????????????
??????????????????? case 2 :? //頂部居中
??????????????????????? $dst_x = ($fileinfo[0] - $wminfo[0]) / 2; $dst_y = 0; break;???????????????
??????????????????? case 3 :? //頂部居右
??????????????????????? $dst_x = $fileinfo[0]; $dst_y = 0; break;???????????????
??????????????????? case 4 :? //底部居左
??????????????????????? $dst_x = 0; $dst_y = $fileinfo[1]; break;???????????????
??????????????????? case 5 :? //底部居中
??????????????????????? $dst_x = ($fileinfo[0] - $wminfo[0]) / 2; $dst_y = $fileinfo[1]; break;???????
??????????????????? case 6 :? //底部居右
??????????????????????? $dst_x = $fileinfo[0]-$wminfo[0]; $dst_y = $fileinfo[1]-$wminfo[1]; break;
??????????????????? default : //隨機
??????????????????????? $dst_x = mt_rand(0,$fileinfo[0]-$wminfo[0]); $dst_y = mt_rand(0,$fileinfo[1]-$wminfo[1]);
??????????????? }
??????????????? if (function_exists('ImageAlphaBlending')) ImageAlphaBlending($temp_wm,True); //設(shè)定圖像的混色模式
??????????????? if (function_exists('ImageSaveAlpha')) ImageSaveAlpha($temp_wm,True); //保存完整的 alpha 通道信息
??????????????? //為圖像添加水印
??????????????? if (function_exists('imageCopyMerge')) {
??????????????????? ImageCopyMerge($temp,$temp_wm,$dst_x,$dst_y,0,0,$wminfo[0],$wminfo[1],$this->watermark_trans);
??????????????? } else {
??????????????????? ImageCopyMerge($temp,$temp_wm,$dst_x,$dst_y,0,0,$wminfo[0],$wminfo[1]);
??????????????? }
??????????????? //保存圖片
??????????????? switch ($fileinfo['mime']) {
??????????????????? case 'image/jpeg' :
??????????????????????? @imageJPEG($temp,$file);
??????????????????????? break;
??????????????????? case 'image/png' :
??????????????????????? @imagePNG($temp,$file);
??????????????????????? break;
??????????????????? case 'image/gif' :
??????????????????????? @imageGIF($temp,$file);
??????????????????????? break;
??????????????? }
??????????????? //銷毀零時圖像
??????????????? @imageDestroy($temp);
??????????????? @imageDestroy($temp_wm);
??????????? }
??????? }
??? }
??? //獲取文件擴展名
??? function fileext($filename) {
??????? return strtolower(substr(strrchr($filename,'.'),1,10));
??? }
}
?>