Curl multi function GET snippet

gistfile1.php

<?php
function curl_multi($urls = array()) {
    $curl = array();
    $result = array();

    $mh = curl_multi_init();
    foreach ($urls as $id=>$url) {
        $curl[$id] = curl_init();
        curl_setopt($curl[$id], CURLOPT_URL, $url);
        curl_setopt($curl[$id], CURLOPT_HEADER, 0);
        curl_setopt($curl[$id], CURLOPT_TIMEOUT, 30);
        curl_setopt($curl[$id], CURLOPT_USERAGENT, 'Mozilla/5.0 (compatible; curl)');
        curl_setopt($curl[$id], CURLOPT_RETURNTRANSFER, true);
        curl_multi_add_handle($mh, $curl[$id]);
    }

    $running = null;
    do {
        curl_multi_exec($mh, $running);
    } while($running > 0);
    foreach($curl as $id=>$c) {
        $result[$id] = curl_multi_getcontent($c);
        curl_multi_remove_handle($mh, $c);
    }
    curl_multi_close($mh);
    return $result;
}

$urls[] = 'http://api.url.a.com/';
$urls[] = 'http://api.url.b.com/';

echo '<pre>'.print_r(curl_multi($urls), true).'</pre>';
?>