wp_make_link_relative( string $link )

Convert full URL paths to absolute paths.

Description

Removes the http or https protocols and the domain. Keeps the path ‘/’ at the beginning, so it isn’t a true relative link, but from the web root base.

Parameters

$link: (Required) Full URL path.

Return

(string) Absolute path.

Source

File: wp-includes/formatting.php

function wp_make_link_relative( $link ) {
	return preg_replace( '|^(https?:)?//[^/]+(/?.*)|i', '$2', $link );
}

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Changelog

Changelog
Version	Description
WP-4.1.0	Support was added for relative URLs.
WP-2.1.0	Introduced.