How to get image with url in php

<?php
$image_url = "http://t3.gstatic.com/images?q=tbn:ANd9GcRCBzEak6hmPpaYR_eBWfa8cG6ChslyjqRKt9mjGUIj36iT9wOOVg"; // here insert link
$ch = curl_init();
$timeout = 0;
curl_setopt ($ch, CURLOPT_URL, $image_url);
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
$image = curl_exec($ch);
curl_close($ch);
header("Content-type: image/jpeg");
print $image;
$f = fopen('image.jpg', 'w');
fwrite($f, $image);
fclose($f);
?>