Requires the Hack Standard Library to be installed.
Facebook Engineer?

This function is available as Regex\every_match() in Facebook's www repository.

Returns all matches found in $haystack given the regex pattern $pattern and an optional offset at which to start the search

namespace HH\Lib\Regex;

function every_match<T as Match>(
  string $haystack,
  Pattern<T> $pattern,
  int $offset = 0,
): vec<T>;

Throws Invariant[Violation]Exception if $offset is not within plus/minus the length of $haystack.


  • string $haystack
  • Pattern<T> $pattern
  • int $offset = 0


  • vec<T>