dump-rewrite-rules.php

<?php
function dump_rewrite_rules() {
		$tmp_file = '/tmp/rewrite_rule_dump.txt'; // define filename here if needed
		if ( !touch( $tmp_file ) || !is_writeable( $tmp_file ) ) {
				error_log( 'dump_rewrite_rules: The file ' . $tmp_file . ' is not writable. Please check the permissions.' );
				return;
		}

		global $wp_rewrite;
		$rules = var_export( $wp_rewrite, true );
		file_put_contents( $tmp_file, $rules );
		error_log( 'dump_rewrite_rules: Your dump is available at ' . $tmp_file );
}