php 切取图片代码

php 切取图片代码

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function resizeThumbnailImage($thumb_image_name, $image, $width, $height, $start_width, $start_height, $scale){
 list($imagewidth, $imageheight, $imageType) = getimagesize($image);
 $imageType = image_type_to_mime_type($imageType);
 
 $newImageWidth = ceil($width * $scale);
 $newImageHeight = ceil($height * $scale);
 $newImage = imagecreatetruecolor($newImageWidth,$newImageHeight);
 switch($imageType) {
  case "image/gif":
   $source=imagecreatefromgif($image);
   break;
     case "image/pjpeg":
  case "image/jpeg":
  case "image/jpg":
   $source=imagecreatefromjpeg($image);
   break;
     case "image/png":
  case "image/x-png":
   $source=imagecreatefrompng($image);
   break;
   }
 imagecopyresampled($newImage,$source,0,0,$start_width,$start_height,$newImageWidth,$newImageHeight,$width,$height);
 switch($imageType) {
  case "image/gif":
     imagegif($newImage,$thumb_image_name);
   break;
       case "image/pjpeg":
  case "image/jpeg":
  case "image/jpg":
     imagejpeg($newImage,$thumb_image_name,90);
   break;
  case "image/png":
  case "image/x-png":
   imagepng($newImage,$thumb_image_name); 
   break;
    }
 chmod($thumb_image_name, 0777);
 return $thumb_image_name;
}