<?php    
    multi_threads_request($nodes){    
        $mh = curl_multi_init();    
        $curl_array = array();    
        foreach($nodes as $i => $url)    
        {    
            $curl_array[$i] = curl_init($url);    
            curl_setopt($curl_array[$i], CURLOPT_RETURNTRANSFER, true);    
            curl_multi_add_handle($mh, $curl_array[$i]);    
        }    
        $running = NULL;    
        do {    
            usleep(10000);    
            curl_multi_exec($mh,$running);    
        } while($running > 0);    
            
        $res = array();    
        foreach($nodes as $i => $url)    
        {    
            $res[$url] = curl_multi_getcontent($curl_array[$i]);    
        }    
            
        foreach($nodes as $i => $url){    
            curl_multi_remove_handle($mh, $curl_array[$i]);    
        }    
        curl_multi_close($mh);          
        return $res;    
    }    
        
    print_r(multi_threads_request(array(    
        'http://www.open-open.com',    
        'http://www.baidu.com',    
    ));   
    ?>