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search_last_l

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 last position of the "needle" string in the "haystack" string, or null if it isn't found

namespace HH\Lib\Str;

function search_last_l(
  \HH\Lib\Locale\Locale $locale,
  string $haystack,
  string $needle,
  int $offset = 0,
): ?int;

An optional offset determines where in the haystack (from the beginning) the search begins. If the offset is negative, the search will begin that many characters from the end of the string and go backwards. If the offset is out-of-bounds, a InvalidArgumentException will be thrown.

  • To simply check if the haystack contains the needle, see Str\contains().
  • To get the first position of the needle, see Str\search().

Previously known in PHP as strrpos.

Guide​

Parameters​

  • \HH\Lib\Locale\Locale $locale
  • string $haystack
  • string $needle
  • int $offset = 0

Returns​

  • ?int