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一款php按比例生成缩略图代码

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Release: 2016-06-13 09:48:32
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一款php按比例生成缩略图代码 本文章里面image就是你要生成的图片地址哦,这是一php按比例生成缩略图代码,只要给你图片他就能生成指定大小的图片哦,并且不变形ekt

一款php教程按比例生成缩略图代码

本文章里面image就是你要生成的图片地址哦,这是一php按比例生成缩略图代码,只要给你图片他就能生成指定大小的图片哦,并且不变形ekt
*/

function resizeimage($image,$width,$height,$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,0,0,0,0,$newimagewidth,$newimageheight,$width,$height);
 
 switch($imagetype) {
  case "image/gif":
     imagegif($newimage,$image);
   break;
       case "image/pjpeg":
  case "image/jpeg":
  case "image/jpg":
     imagejpeg($newimage,$image,90);
   break;
  case "image/png":
  case "image/x-png":
   imagepng($newimage,$image); 
   break;
    }
 
 chmod($image, 0777);
 return $image;
}
?>

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