Class implements curl_multi_* function family with random user agent string generation
Example usage:
$links = array(
'http://link1.com',
'http://link1.com/page1',
'http://link1.com/page2'
);
$result = array();
foreach (array_chunk($links, 2) as $chunk) {
$pcurl = new ParallelCurl($chunk);
$result[] = $pcurl->download();
}
print_r($result);