检查网址是否包含http：//或https：// [复制]

Possible Duplicate:
Check if the url is contains the http or https

What is the code to figure out whether the given URL contains http:// or https:// at the beginning using PHP and regular expressions?

you can use parse_url

<?php
$url = parse_url('https://example.org');

if($url['scheme'] == 'https'){
   // is https;
}
?>

Maybe this could help

$_SERVER['SERVER_PROTOCOL'];

if (substr($string, 0, 7) == "http://")
    $res = "http";

if (substr($string, 0, 8) == "https://")
    $res = "https";