note 22114 deleted from ref.array by sniper

Note Submitter: bishop ---- Sometimes you need an array that has all keys exactly equal to all values. For example, arrays that look like: array('a' => 'a', 'b' => 'b', 'c' => 'c'); You can either do it manually (a pain for count($a) > 2), or use array_smear(): /* smear values across into keys, or vice-versa */ function array_smear($a, $v2k = true) { $values = ($v2k) ? array_values($a) : array_keys($a); $a = array(); foreach ($values as $v) $a[$v] = $v; return ($a); } array_smear takes an array, then a boolean specifying whether you want to smear the values over into the keys (the default, and probably what you usually want) or vice-versa. So: $a = array('a', 'b', 'c'); $x = array_smear($a); // x == array('a' => 'a', 'b' => 'b', 'c' => 'c'); $y = array_smear($a, false); // y == array(0 => 0, 1 => 1, 2 => 2);