Trim Right

:::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 with whitespace stripped from the right

namespace HH\Lib\Str;

function trim_right(
  string $string,
  ?string $char_mask = NULL,
): string;

See Str\trim for more details.

• To strip from both ends, see Str\trim().
• To only strip from the left, see Str\trim_left().
• To strip a specific suffix (instead of all characters matching a mask), see Str\strip_suffix().

Guide

• String

Parameters

• string $string
• ?string $char_mask = NULL

Returns

• string