什么是在PHP中获取多个HTTP请求标头的（最佳|快速）方法

Question

Example : But, loading pages really slow.
Any other PHP code or JavaScript.

My example code in PHP:

<?php
$aaalink = 'http://www.bbc.com/news';
function aaa_get_http_response($aaalink) {$headers = get_headers($aaalink);return substr($headers[0], 9, 3);}
$aaa_get_http_response = aaa_get_http_response($aaalink);
if ( $aaa_get_http_response == 200 ) 
{
echo $aaalink;
} 
else 
{echo "404";}
?>

<br>

<?php
$bbblink = 'http://www.independent.ie/news/';
function bbb_get_http_response($bbblink) {$headers = get_headers($bbblink);return substr($headers[0], 9, 3);}
$bbb_get_http_response = bbb_get_http_response($bbblink);
if ( $bbb_get_http_response == 200 ) 
{
echo $bbblink;
} 
else 
{echo "404";}
?>

<br>

<?php
$ccclink = 'http://www.rediff.com/news';
function ccc_get_http_response($ccclink) {$headers = get_headers($ccclink);return substr($headers[0], 9, 3);}
$ccc_get_http_response = ccc_get_http_response($ccclink);
if ( $ccc_get_http_response == 200 ) 
{
echo $ccclink;
} 
else 
{echo "404";}
?>

Image:

Answer 1

The get_headers will wait until the requested website responds, the network quality matters. aaa/bbb/ccc_get_http_response is the same, use a foreach loop instead.