Fetching images using curl php

<?php
function check() {
//create curl resource
$ch = curl_init();
$search_string = "pc video games";
$url = "https://www.amazon.com/s/field-keywords=$search_string";
//set curl options
curl_setopt($ch, CURLOPT_COOKIE, true); //websites like https://www.amazon.com have robot check feature , which restricts the opening of their webpage,therefore this option has been used.
curl_setopt($ch, CURLOPT_URL, $url);
//For accessing the https sites
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
//For saving the output in a variable (which we create during execution) , instead of displaying the webpage. To see that output , just echo it out.
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
//run curl (i.e. execute curl resource
$output = curl_exec($ch);
preg_match_all("!https://images-na.ssl-images-amazon.com/images/I/[^\s]*?._AC_US218_.jpg!", $output, $matches);
$images = array_values(array_unique($matches[0]));
for ($i = 0; $i < count($images); $i++) {
echo "<div style='float:left;margin:10 0 0 0;'>"
. "<img src='$images[$i]'><br></div>";
}
//close curl resource
curl_close($ch);
}
?>