PHP 生成缩略图的类

PHP生成缩略图的类PHP代码<?php/***功能:生成缩略图*作者:phpox*日期:ThuMay1709:57:05CST2007*/classCreatMiniature{//公共变量var$srcFile="";//原图var$echoType;//输出图片类型，link--不保存为文件；file--保存为文件var$im="";//临时变量var$srcW="";//原图宽var$srcH="";//原图高//设置变量及初始化functionSetVar($srcFile,$echoType){if(!file_exists($srcFile)){echo'源图片文件不存在!';exit();}$this->srcFile=$srcFile;$this->echoType=$echoType;$info="";$data=GetImageSize($this->srcFile,$info);switch($data[2]){case1:if(!function_exists("imagecreatefromgif")){echo"你的GD库不能使用GIF格式的图片，请使用Jpeg或PNG格式！<ahref='javascript:go(-1);'>返回</a>";exit();}$this->im=ImageCreateFromGIF($this->srcFile);break;case2:if(!function_exists("imagecreatefromjpeg")){echo"你的GD库不能使用jpeg格式的图片，请使用其它格式的图片！<ahref='javascript:go(-1);'>返回</a>";exit();}$this->im=ImageCreateFromJpeg($this->srcFile);break;case3:$this->im=ImageCreateFromPNG($this->srcFile);break;}$this->srcW=ImageSX($this->im);$this->srcH=ImageSY($this->im);}//生成扭曲型缩图functionDistortion($toFile,$toW,$toH){$cImg=$this->CreatImage($this->im,$toW,$toH,0,0,0,0,$this->srcW,$this->srcH);return$this->EchoImage($cImg,$toFile);ImageDestroy($cImg);}//生成按比例缩放的缩图functionProrate($toFile,$toW,$toH){$toWH=$toW/$toH;$srcWH=$this->srcW/$this->srcH;if($toWH<=$srcWH){$ftoW=$toW;$ftoH=$ftoW*($this->srcH/$this->srcW);}else{$ftoH=$toH;$ftoW=$ftoH*($this->srcW/$this->srcH);}if($this->srcW>$toW||$this->srcH>$toH){$cImg=$this->CreatImage($this->im,$ftoW,$ftoH,0,0,0,0,$this->srcW,$this->srcH);return$this->EchoImage($cImg,$toFile);ImageDestroy($cImg);}else{$cImg=$this->CreatImage($this->im,$this->srcW,$this->srcH,0,0,0,0,$this->srcW,$this->srcH);return$this->EchoImage($cImg,$toFile);ImageDestroy($cImg);}}//生成最小裁剪后的缩图functionCut($toFile,$toW,$toH){$toWH=$toW/$toH;$srcWH=$this->srcW/$this->srcH;if($toWH<=$srcWH){$ctoH=$toH;$ctoW=$ctoH*($this->srcW/$this->srcH);}else{$ctoW=$toW;$ctoH=$ctoW*($this->srcH/$this->srcW);}$allImg=$this->CreatImage($this->im,$ctoW,$ctoH,0,0,0,0,$this->srcW,$this->srcH);$cImg=$this->CreatImage($allImg,$toW,$toH,0,0,($ctoW-$toW)/2,($ctoH-$toH)/2,$toW,$toH);return$this->EchoImage($cImg,$toFile);ImageDestroy($cImg);ImageDestroy($allImg);}//生成背景填充的缩图functionBackFill($toFile,$toW,$toH,$bk1=255,$bk2=255,$bk3=255){$toWH=$toW/$toH;$srcWH=$this->srcW/$this->srcH;if($toWH<=$srcWH){$ftoW=$toW;$ftoH=$ftoW*($this->srcH/$this->srcW);}else{$ftoH=$toH;$ftoW=$ftoH*($this->srcW/$this->srcH);}if(function_exists("imagecreatetruecolor")){@$cImg=ImageCreateTrueColor($toW,$toH);if(!$cImg){$cImg=ImageCreate($toW,$toH);}}else{$cImg=ImageCreate($toW,$toH);}$backcolor=imagecolorallocate($cImg,$bk1,$bk2,$bk3);//填充的背景颜色ImageFilledRngle($cImg,0,0,$toW,$toH,$backcolor);if($this->srcW>$toW||$this->srcH>$toH){$proImg=$this->CreatImage($this->im,$ftoW,$ftoH,0,0,0,0,$this->srcW,$this->srcH);if($ftoW<$toW){ImageCopy($cImg,$proImg,($toW-$ftoW)/2,0,0,0,$ftoW,$ftoH);}elseif($ftoH<$toH){ImageCopy($cImg,$proImg,0,($toH-$ftoH)/2,0,0,$ftoW,$ftoH);}else{ImageCopy($cImg,$proImg,0,0,0,0,$ftoW,$ftoH);}}else{ImageCopyMerge($cImg,$this->im,($toW-$ftoW)/2,($toH-$ftoH)/2,0,0,$ftoW,$ftoH,100);}return$this->EchoImage($cImg,$toFile);ImageDestroy($cImg);}functionCreatImage($img,$creatW,$creatH,$dstX,$dstY,$srcX,$srcY,$srcImgW,$srcImgH){if(function_exists("imagecreatetruecolor")){@$creatImg=ImageCreateTrueColor($creatW,$creatH);if($creatImg)ImageCopyResampled($creatImg,$img,$dstX,$dstY,$srcX,$srcY,$creatW,$creatH,$srcImgW,$srcImgH);else{$creatImg=ImageCreate($creatW,$creatH);ImageCopyResized($creatImg,$img,$dstX,$dstY,$srcX,$srcY,$creatW,$creatH,$srcImgW,$srcImgH);}}else{$creatImg=ImageCreate($creatW,$creatH);ImageCopyResized($creatImg,$img,$dstX,$dstY,$srcX,$srcY,$creatW,$creatH,$srcImgW,$srcImgH);}return$creatImg;}//输出图片，link---只输出，不保存文件。file--保存为文件functionEchoImage($img,$to_File){switch($this->echoType){case"link":if(function_