PHP智能把图片生成缩略图类_PHP教程

一个PHP智能把图片生成缩略图类,可自动根据你图片的大小生成等比例的图片哦，有需要的朋友可参考参考。

代码如下

复制代码

/***************************************  *作者：落梦天蝎（beluckly）  *完成时间：2006-12-18  *类名：CreatMiniature  *功能：生成多种类型的缩略图  *基本参数：$srcFile,$echoType  *方法用到的参数：                  $toFile,生成的文件                  $toW,生成的宽                  $toH,生成的高                  $bk1,背景颜色参数 以255为最高                  $bk2,背景颜色参数                  $bk3,背景颜色参数     *例子：         include("thumb.php");      $cm=new CreatMiniature();      $cm->SetVar("1.jpg","file");      $cm->Distortion("dis_bei.jpg",150,200);      $cm->Prorate("pro_bei.jpg",150,200);      $cm->Cut("cut_bei.jpg",150,200);       $cm->BackFill("fill_bei.jpg",150,200);     ***************************************/     class CreatMiniature  {      //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 $srcH="";            //原图高         //设置变量及初始化      function SetVar($srcFile,$echoType)      {          $this->srcFile=$srcFile;          $this->echoType=$echoType;             $info = "";          $data = GetImageSize($this->srcFile,$info);          switch ($data[2])          {           case 1:             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！返回";              exit();             }             $this->im = ImageCreateFromGIF($this->srcFile);             break;          case 2:            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！返回";             exit();            }            $this->im = ImageCreateFromJpeg($this->srcFile);                break;          case 3:            $this->im = ImageCreateFromPNG($this->srcFile);                break;        }        $this->srcW=ImageSX($this->im);        $this->srcH=ImageSY($this->im);       }            //生成扭曲型缩图      function Distortion($toFile,$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      function Prorate($toFile,$toW,$toH)      {          $toWH=$toW/$toH;          $srcWH=$this->srcW/$this->srcH;          if($toWH          {              $ftoW=$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      function Cut($toFile,$toW,$toH)      {            $toWH=$toW/$toH;            $srcWH=$this->srcW/$this->srcH;            if($toWH            {                 $ctoH=$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($allImg);      }         //生成背景填充的缩图      function BackFill($toFile,$toW,$toH,$bk1=255,$bk2=255,$bk3=255)      {          $toWH=$toW/$toH;          $srcWH=$this->srcW/$this->srcH;          if($toWH          {              $ftoW=$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, $bk3);        //填充的背景颜色          ImageFilledRectangle($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               {                   ImageCopyMerge($cImg,$proImg,($toW-$ftoW)/2,0,0,0,$ftoW,$ftoH,100);               }               else if($ftoH               {                   ImageCopyMerge($cImg,$proImg,0,($toH-$ftoH)/2,0,0,$ftoW,$ftoH,100);               }               */              if($ftoW              {                   ImageCopy($cImg,$proImg,($toW-$ftoW)/2,0,0,0,$ftoW,$ftoH);              }              else if($ftoH              {                   ImageCopy($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);      }               function CreatImage($img,$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 $creatImg;      }            //输出图片，link---只输出，不保存文件。file--保存为文件      function EchoImage($img,$to_File)      {          switch($this->echoType)          {              case "link":                  if(function_exists('imagejpeg')) return ImageJpeg($img);                  else return ImagePNG($img);                  break;              case "file":                  if(function_exists('imagejpeg')) return ImageJpeg($img,$to_File);                  else return ImagePNG($img,$to_File);                  break;          }      }     }  ?>

http://www.bkjia.com/PHPjc/632961.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/632961.htmlTechArticle一个PHP智能把图片生成缩略图类,可自动根据你图片的大小生成等比例的图片哦，有需要的朋友可参考参考。 代码如下 复制代码 ?php /******...