multicurl.php

<?php
/**
 * Retrieves data and curl connection info for an array of one or more urls
 * using curl_multi_*. Input order & array key equal output order & array key.
 * Returns 2-dimensional array containing url data & curl info.
 * @param array $urls
 * @return array $res
 */
function multicurl($urls) {

	// The curl multi handle.
	$mh = curl_multi_init();

	// Array of curl handles.
	$chs = array();

	// Result array which will be returned.
	$res = array();

	// Create a curl handle for each url and add it to the $mh.
	foreach ($urls as $key => $url) {
		$chs[$key] = curl_init();
		curl_setopt($chs[$key],	CURLOPT_URL,		$url);
		curl_setopt($chs[$key],	CURLOPT_RETURNTRANSFER,	1);
		curl_setopt($chs[$key],	CURLOPT_FOLLOWLOCATION,	1);
		curl_multi_add_handle($mh, $chs[$key]);
	}

	// Loop through $mh while there are active connections,
	// but put to sleep so we don't eat up too much unnecessary cpu power.
	$active = null;
	do {
		usleep(10000);
		curl_multi_exec($mh, $active);
	} while ($active > 0);

	// Store url contents and connection info into result array.
	foreach ($chs as $key => $ch) {
		$res[$key]['data'] = curl_multi_getcontent($ch);
		$res[$key]['info'] = curl_getinfo($ch);
		curl_multi_remove_handle($mh, $ch);
	}
	curl_multi_close($mh);

	return $res;
}