To Int

:::info[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. :::

Returns the given string as an integer, or null if the string isn't numeric

namespace HH\Lib\Str;

function to_int(
  string $string,
): ?int;

Guide

• String

Parameters

• string $string

Returns

• ?int