header("Content-type: image/jpeg");
$filename = 'book_rabbit_rule.jpg';
$im = imagecreatefromjpeg($filename);
$new_img_width = 120;
$new_img_height = 42;
$newim = imagecreate($new_img_width, $new_img_height);
// 输出图要从哪边开始 x, y ,原始图要从哪边开始 x, y ,要画多大 x, y(resize) , 要抓多大 x, y
imagecopyresampled($newim, $im, 0, 0, 7, 174, 120, 42, $new_img_width, $new_img_height);
// imagecopyresampled($newim, $im, 0, 0, 100, 30, 500, 500, $new_img_width, $new_img_height);
imagejpeg($newim);
imagedestroy($newim);
imagedestroy($im);
?>