to_string

Note

This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information.

Renders a Regex Pattern to a string

namespace HH\Lib\Regex;

function to_string(
  Pattern<Match> $pattern,
): string;

The regex pattern follows the PCRE library: https://www.pcre.org/original/doc/html/pcresyntax.html.

Guide

• String

Parameters

• Pattern<Match> $pattern

Returns

• string