一個完整的圖片上傳php類

這個php圖片上傳類別功能非常完善，完全可以滿足各種圖片上傳需求

/********************************
 蹺蹺板同事| http://seesaw.net

 用戶端：
 文件：
 說明：

 版權所有(C) 2008 Matt Kenefick(.com)
***** ******** ***************************/

class mk_imageUpload{

 var $max_size; var $thumb_height;
 var $dest_dir;
 var $extensions;
 var $max_height;
 var $max_main_height;


; var $last_pid;
 var $last_uid;

 var $image_file;
 var $image_field;

 function __construct( $maxHeightMain, $maxHeightMain, $maxHeight $this->max_size = (1024/2)*1000;     // 750kb
 $this->allowed_types = array( 'jpeg', 'jpg', 'pjpeg', 'gif', 'png' );
 $this->extensions = array(
 ' image/jpeg' => '.jpg',
 'image/gif' => '.gif',
 'image/png' => '.png',
 ' image/x-png ' => '.png',
 'image/pjpeg' => '.jpg'
 );
 $this->dest_dir = $destDir;
 $this->max_height = $maxHeightThumb ;
 $this->max_main_height = $maxHeightMain;
 }

 function putImage( $formname, $newName ){
 $this-> ;image_field = $formname;
 if ( $this->getImage() ){

 // 檢查錯誤
 if ( !$this->checkType() )
 return $this->throwError(2);

 if ( !$this->checkFileSize() )
 return $this->throwError(1);


 // 取得圖片
 $img = $this-> image_file;

 // 檢查acquire
 if ( !$this->checkImageSize() )
 return $this -> throwError(3);

 // 取得圖片尺寸
 $size = $this->getImageSize();
 $size['width'] = $size[0] ;
 $size['height'] = $size[1];
 $ratio = $this->max_height/$size['height'];

 $maxheight = $this ->max_height;
 $maxwidth = $size['width'] * $ratio;

 // 建立
 $s_t = $this->resizeImage( $size, $img , $maxwidth, $maxheight,$newName,'s' );

 if ( $ $ size['height'] > $this->max_main_height ){
 $ratio = $this->max_main_height/$size['height'];
 $maxheight = $this->max_main_height;
 $ $ maxwidth = $size ['寬度'] * $ratio;
 }else{
 $maxheight = $size['height'];
 $maxwidth = $size['width'];
 }

 // 建立大的重新縮放
 $s_l = $this->resizeImage( $size, $img, $maxwidth, $maxheight,$newName,'l' );

 // 刪除暫存檔案
 unlink($img['tmp_name']);

 if( $s_t && $s_l ){
 $nm = split('_', $newName );
 $this->last_ext = $this->extensions[$size['mime']];
 $this->last_pid = $nm[0];
 $this-> last_uid = $ nm[1];
 return 'ok';
 }else{
 return $this->throwError( 4 );
 }
 }else{
 return $this->throwError( 2 );
 }
 }

 function resizeImage($size,$img, $maxwid,$img, $ maxheight,$newName,$ext){
 // 建立大概
 if($size['mime'] == "image/pjpeg" || $size['mime'] == "image / jpeg "){
 $new_img = imagecreatefromjpeg($img['tmp_name']);
 }elseif($size['mime'] == "image/x-png" || $size[' mime ' ] == "image/png"){
 $new_img = imagecreatefrompng($img['tmp_name']);
 }elseif($size['mime'] == "image/gif") {
 $new_img = imagecreatefromgif($img['tmp_name']);
 }

 if (function_exists('imagecreatetruecolor')){
 $resized_img = color')){
 $resized_img = 著色;
 }else{
 return("錯誤：請確保您的伺服器有GD 函式庫版本2 ");
 }

 imagecopyresized($resized_img, $new_img, 0, 0, 0, 0, $maxwidth, $maxheight, $size['width'], $size['height']);
 if(> if(> if(> if(> if(>) $size['mime'] == "image/pjpeg" || $size['mime'] == "image/jpeg"){
 $success = ImageJpeg ($resized_img,$this->dest_dir.$ newName.'_'.$ext.$this->extensions[$size['mime']]);
 }elseif($size['mime'] == "image/x-png" | $newName .'_'.$ext.$this->extensions[$size['mime']]);
 | $size['mime'] == "image/png"){
 $success = ImagePNG ($resized_img,$this->dest_dir.$newName.'_'.$ext.$this-> 擴充[$ size['mime']]);
 }elseif($size['mime'] == "image/gif"){
 $success = ImageGIF ($resized_img,$this->; dest_dir.$ newName.'_'.$ext.$this->extensions[$size['mime']]);
 }

 // 刪除臨時映像
 ImageDestroy ($ resized_img);
 ImageDestroy ($new_img);

 return $success;
 }

 function getImage(){
 if( isset($_FILES[$this-image" && is_uploaded_file($_FILES[$this->image_field]['tmp_name']) ){
 $this->image_file = $_FILES[$this->image_field];
 return true;
 }
 }
 return false;
 }

 function returnImg(){
 return $this->image_file;
 }

 function getImageSize((MgetImage) $returnImg();

 return getimagesize($img['tmp_name']);
 }

 function checkImageSize( ){
 $size = $s ->getImageSize();

 if( $size[1] max_height )
 return false;
 return true;
 }

函數checkFileSize(){
 $img = $this->returnImg();

 if( $img['size'] > $this->max_size )
 return false;
 return true;
 }

 function checkType(){
 $img = $this->returnImg();

 $type = split('/',$img[' type']);
 if( !in_array( $type[ 1], $this->allowed_types ) )
 回傳false;
 回傳true;
 }

 functionthrow> function throwor ($val){
 switch($val){
 case 1: return '錯誤:檔案大小專業';
 break;
 case 2: return '錯誤:檔案格式不正確' ;
break;
情況3：返回'錯誤：您的圖片太小';
break;
情況4：返回'錯誤：創建圖片時出錯';
break;
 }
 }

}

圖片上傳，php