image.php

<?php

function fetch_image($url, $referer)
{
    $curl = curl_init($url);
    curl_setopt($curl, CURLOPT_HEADER, FALSE);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt($curl, CURLOPT_REFERER, $referer);
    $re = curl_exec($curl);
    if (curl_errno($curl))
    {
        return NULL;
    }
    return $re;
}