使用php下载图像，同时调整大小

I want to download this image: http://imgs.xkcd.com/clickdrag/1n2w.png

But the image is too large for me so i want to resize it to lets say 100 times smaller than it is now. Also i want the image to have its original name (in this case 1n2w.png).

For downloading i was thinking of using somet
$content = file_get_contents('http://imgs.xkcd.com/clickdrag/1n2w.png');
file_put_contents('/images', $content);

But it didnt work. Maybe i need to use curl for this? As for the resizing part i dont know what to use, so if possible i would like too see some suggestions on this.

For image re-sizing you can use it.

    $percent = 0.5;

    $filename = '/home/Pictures/downloaded_file.jpg';

    header('Content-type: image/jpeg');

    list($width, $height) = getimagesize($filename);

    $new_width = $width * $percent;

    $new_height = $height * $percent;

    $image_p = imagecreatetruecolor($new_width, $new_height);

    $image = imagecreatefromjpeg($filename)
    ;
    imagecopyresampled($image_p, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);

    imagejpeg($image_p, null, 100);