Check whether the URL scheme is HTTP or HTTPS

Question

I'm using the following code to add http:// to the URL.

(substr(strtolower($url), 0, 7) == 'http://'?"":"http://").$url

but how can I check whether the original URL contains https ? I don't want to use an OR clause.

Answer 1

preg_match("@^https?://@", $url)

Answer 2

echo parse_url($url, PHP_URL_SCHEME);

文档https://www.php.net/manual/en/function.parse-url.php

Answer 3

Use preg_match and a regular expression on your url :

preg_match(^http(s)?://);

If it returns true, then your URL is ok, whether it uses http of https.

Answer 4

!empty($_SERVER['HTTPS']) ? 'https' : 'http'

Answer 5

strncmp($url, 'https:', 6) === 0