[PHP] multiRequest関数をgetのみに絞り、少し調整したもの。 http://www.phpied.com/simultaneuos-http-requests-in-php-with-curl/

multi_get.php

function multi_get($urls,$options=array()){
	$result=array();

	$mh=curl_multi_init();

	$curly=array();
	foreach($urls as $key=>$url){
		if(empty($url) || is_array($url) || !preg_match('/^(ftp|http)/',$url)){
                        if (is_readable($url)) {
                                $result[$key] = file_get_contents($url);
                        }
			continue;
		}

		$curly[$key]=curl_init();
		curl_setopt($curly[$key],CURLOPT_URL,$url);
		curl_setopt($curly[$key],CURLOPT_HEADER,0);
		curl_setopt($curly[$key],CURLOPT_RETURNTRANSFER,1);

		if(!empty($options)){
			curl_setopt_array($curly[$key],$options);
		}
		curl_multi_add_handle($mh,$curly[$key]);
	}

	if(!empty($curly)){
                $running=NULL;
    	        do {
    	                curl_multi_exec($mh,$running);
    	        }while($running>0);

    	        foreach($curly as $key=>$c){
    		        if(empty($c)){
    			        continue;
    		        }
    	        	$result[$key]=curl_multi_getcontent($c);
    		        curl_multi_remove_handle($mh,$c);
    	        }
	}

        curl_multi_close($mh);

	return $result;
}