is_ssl()

Determines if SSL is used.


Description Description


Return Return

(bool) True if SSL, otherwise false.


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Source Source

File: wp-includes/load.php

function is_ssl() {
	if ( isset( $_SERVER['HTTPS'] ) ) {
		if ( 'on' == strtolower( $_SERVER['HTTPS'] ) ) {
			return true;
		}

		if ( '1' == $_SERVER['HTTPS'] ) {
			return true;
		}
	} elseif ( isset($_SERVER['SERVER_PORT'] ) && ( '443' == $_SERVER['SERVER_PORT'] ) ) {
		return true;
	}
	return false;
}

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Changelog Changelog

Changelog
Version Description
4.6.0 Moved from functions.php to load.php.
2.6.0 Introduced.


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User Contributed Notes User Contributed Notes

  1. Skip to note 1 content
    Contributed by Codex

    With load balancers

    It won’t work for websites behind some load balancers, especially Network Solutions hosted websites. To bodgy up a fix, save this gist into the plugins folder and enable it. For details, read “WordPress is_ssl() doesn’t work behind some load balancers.”

    Websites behind load balancers or reverse proxies that support HTTP_X_FORWARDED_PROTO can be fixed by adding the following code to the wp-config.php file, above the require_once call:

    if (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https')
        $_SERVER['HTTPS'] = 'on';
    

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