Determines whether or not the specified URL is of a host included in the internal hosts list.

Description

See also

• wp_internal_hosts()

Parameters

$linkstringrequired

The URL to test.

Return

Source

function wp_is_internal_link( $link ) {
	$link = strtolower( $link );
	if ( in_array( wp_parse_url( $link, PHP_URL_SCHEME ), wp_allowed_protocols(), true ) ) {
		return in_array( wp_parse_url( $link, PHP_URL_HOST ), wp_internal_hosts(), true );
	}
	return false;
}

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