Crop image PHP code

The example below crops the 100x100 part of the upper left corner of the image. You can modify the cropping range by modifying the values ​​​​of $src_x, $src_y, $src_w, $src_h.

 $filename= "test.jpg";
 list($w, $h, $type, $attr) = getimagesize($filename);
 $src_im = imagecreatefromjpeg($filename );

 $src_x = '0'; // begin x
 $src_y = '0'; // begin y
 $src_w = '100'; // width
 $src_h = '100'; // height
 $dst_x = '0'; // destination x
 $dst_y = '0'; // destination y

 $dst_im = imagecreatetruecolor($src_w, $src_h);
 $white = imagecolorallocate($dst_im, 255, 255, 255);
 imagefill($dst_im, 0, 0, $white);

 imagecopy($dst_im, $src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h);

 header( "Content-type: image/png");
 imagepng($dst_im);
 imagedestroy($dst_im);

 ?>

PHP