php 检查 url 是否包含 http:// 或 https://

Check whether url contains http:// or https://

提问by user398341

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

可能重复：
检查 url 是否包含 http 或 https

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

使用 PHP 和正则表达式确定给定 URL 是否包含http://或https://在开头的代码是什么？

回答by Mihai Iorga

you can use parse_url

你可以使用parse_url

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

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

回答by tasmaniski

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

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

回答by Elitmiar

Maybe this could help

也许这会有所帮助

$_SERVER['SERVER_PROTOCOL'];