array_find_key

Returns the key of the first element satisfying a callback function.

array_find_key Function synopsis

array_find_key(array $array, callable $callback): mixed

Parameters

$array

Typearray

$callback

Typecallable

The callback function to call to check each element, which must be

  If this function returns `true`, the key is returned from
  [`array_find_key`](/codex/array_find_key) and the callback will not be called
  for further elements.

Return value

Typemixed