PHP code for screenshots without deformation

function my_image_resize($src_file, $dst_file , $new_width , $new_height)
{
 $src_img=imagecreatefromjpeg($src_file);
 $w=imagesx($src_img);
 $h= imagesy($src_img);
 $ratio_w=1.0 * $new_width / $w;
 $ratio_h=1.0 * $new_height / $h;
 $ratio=1.0;
 // The height and width of the generated image are smaller than the original one , or both are large, the principle is to use a large ratio to enlarge, and use a large ratio to reduce (the reduced ratio will be smaller)
 if( ($ratio_w  1 && $ratio_h > 1))
 {
 if($ratio_w  {
 $ratio = $ratio_h ; // Case 1, the width ratio is smaller than the height direction, crop according to the height ratio standard or Zoom in
 }else {
 $ratio = $ratio_w ;
 }
 // Define an intermediate temporary image whose aspect ratio just meets the target requirements
 $inter_w=(int)($new_width / $ratio);
 $inter_h=(int) ($new_height / $ratio);
 $inter_img=imagecreatetruecolor($inter_w , $inter_h);
 imagecopy($inter_img, $src_img, 0,0,0,0,$inter_w,$inter_h) ;
 // Generate a temporary image with the maximum side length as the size of the target image $ratio
 // Define a new image
 $new_img=imagecreatetruecolor($new_width,$new_height);
 imagecopyresampled($new_img,$ inter_img,0,0,0,0,$new_width,$new_height,$inter_w,$inter_h);
 //imagejpeg($new_img, $dst_file,100); // Store image
 }
 // end if 1
 // 2 One side of the target image is larger than the original image, and one side is smaller than the original image. First enlarge the ordinary image, and then crop it
 //if( ($ratio_w  1) || ($ratio_w > ;1 && $ratio_h  else
 {
 $ratio=$ratio_h>$ratio_w? $ratio_h : $ratio_w; //Take the value with the larger ratio
 //Define a large image in the middle, the image The height or width is equal to the target image, and then enlarge the original image
 $inter_w=(int)($w * $ratio);
 $inter_h=(int) ($h * $ratio);

 $inter_img=imagecreatetruecolor ($inter_w , $inter_h);
 //Crop the original image after scaling it
 imagecopyresampled($inter_img,$src_img,0,0,0,0,$inter_w,$inter_h,$w,$h);
 / / Define a new image
 $new_img=imagecreatetruecolor($new_width,$new_height);
 imagecopy($new_img, $inter_img, 0,0,0,0,$new_width,$new_height);
 }
 imagejpeg($new_img , $dst_file,100); //Storage image
}

$filename = "110.jpg"; //The path of the original image
$fileto="120.jpg";//The path to save after taking the screenshot
$new_w =300;//Set width
$new_h=350; //Set height
my_image_resize($filename,$fileto,$new_w,$new_h);
?>

No deformation, PHP