_internal_hosts()
 *
 * @since 6.2.0
 *
 * @param string $link The URL to test.
 * @return bool Returns true for internal URLs and false for all other URLs.
 */
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;
}
<br />
<b>Fatal error</b>:  Uncaught Error: Call to undefined function plugins_url() in /home/valigeria/public_html/wp-includes/plugin.php:848
Stack trace:
#0 /home/valigeria/public_html/wp-content/plugins/aioseo-local-business/aioseo-local-business.php(41): plugin_dir_url('/home/valigeria...')
#1 /home/valigeria/public_html/wp-settings.php(517): include_once('/home/valigeria...')
#2 /home/valigeria/public_html/wp-config.php(111): require_once('/home/valigeria...')
#3 /home/valigeria/public_html/wp-load.php(50): require_once('/home/valigeria...')
#4 /home/valigeria/public_html/wp-blog-header.php(13): require_once('/home/valigeria...')
#5 /home/valigeria/public_html/index.php(17): require('/home/valigeria...')
#6 {main}
  thrown in <b>/home/valigeria/public_html/wp-includes/plugin.php</b> on line <b>848</b><br />