Source

File: wp-admin/includes/misc.php

function got_url_rewrite() {
	$got_url_rewrite = ( got_mod_rewrite() || $GLOBALS['is_nginx'] || iis7_supports_permalinks() );

	/**
	 * Filters whether URL rewriting is available.
	 *
	 * @since 3.7.0
	 *
	 * @param bool $got_url_rewrite Whether URL rewriting is available.
	 */
	return apply_filters( 'got_url_rewrite', $got_url_rewrite );
}