PHP код реализации функции сжатия изображений высокой четкости без потерь

compressImg($dst_img);

src = $src;
     $this->percent = $percent;
   }
   / ** High Definition Compressed Pictures
    *@ Param string $saveName provides the image name (without extension, with source map extension) for saving. Or do not provide direct display of filename
    */
   public function compressImg($saveName='')
   {
     $this->_openImage();
     If (! Empty ($saveName), $this - >_saveImage ($saveName); // Save
     else $this->_showImage();
   }
   /**
    * Inside: Open the picture
    */
   private function _openImage()
   {
     list($width, $height, $type, $attr) = getimagesize($this->src);
     $this->imageinfo = array(
       'width'=>$width,
       'height'=>$height,
       'type'=>image_type_to_extension($type,false),
       'attr'=>$attr
     );
     $fun = "imagecreatefrom".$this->imageinfo['type'];
     $this->image = $fun($this->src);
     $this->_thumpImage();
   }
   /**
    * Internal: Operating pictures
    */
   private function _thumpImage()
   {
     $new_width = $this->imageinfo['width'] * $this->percent;
     $new_height = $this->imageinfo['height'] * $this->percent;
     $image_thump = imagecreatetruecolor($new_width,$new_height);
     // The original image is duplicated on the image carrier, and compressed in a certain proportion, which greatly maintains the clarity.
     imagecopyresampled($image_thump,$this->image,,,,,$new_width,$new_height,$this->imageinfo['width'],$this->imageinfo['height']);
     imagedestroy($this->image);
     $this->image = $image_thump;
   }
   /**
    * Output picture: save image ()
    */
   private function _showImage()
   {
     header('Content-Type: image/'.$this->imageinfo['type']);
     $funcs = "image".$this->imageinfo['type'];
     $funcs($this->image);
   }
   /**
    * Save the picture to the hard disk:
    *@ Param string $dstImgName, specifiable string name without suffix, using source graph extension. Directly specify the target image name with an extension.
    */
   private function _saveImage($dstImgName)
   {
     if(empty($dstImgName)) return false;
     AllowImgs = ['.jpg','.jpeg','.png','.bmp','.wbmp','.gif']; //If the target image name has a suffix, suffix it with the target image extension; if not, use the source image extension.
     $dstExt = strrchr($dstImgName ,".");
     $sourseExt = strrchr($this->src ,".");
     if(!empty($dstExt)) $dstExt =strtolower($dstExt);
     if(!empty($sourseExt)) $sourseExt =strtolower($sourseExt);
     // Has a specified target name extension
     if(!empty($dstExt) && in_array($dstExt,$allowImgs)){
       $dstName = $dstImgName;
     }elseif(!empty($sourseExt) && in_array($sourseExt,$allowImgs)){
       $dstName = $dstImgName.$sourseExt;
     }else{
       $dstName = $dstImgName.$this->imageinfo['type'];
     }
     $funcs = "image".$this->imageinfo['type'];
     $funcs($this->image,$dstName);
   }
   /**
   * Destroy pictures
   */
   public function __destruct(){
     imagedestroy($this->image);
   }
 }