arrays - PHP array_search -

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is there function accomplish equivalent of array_search $needle array? like, ideal solution:

$needle = array('first', 'second'); $haystack = array('fifth','second','third', 'first');  // returns key 1 in haystack $search = array_search( $needle, $haystack );

if no function, other functions accept needles may arrays can use create custom function?

this might build function:

$intersection = array_intersect($needle, $haystack);  if ($intersection) // $haystack has @ least 1 of $needle  if (count($intersection) == count($needle)) // $haystack has every needle

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