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PHP doesn't make it very easy to recursively look inside a multi-dimensional array. These couple methods make that easier.
$simpsons = array('bart', 'lisa', 'homer');
echo in_array_r("bart", $simpsons) ? 'found' : 'not found';
* Recursively look for Needle in Haystack
* @param $needle
* @param $haystack
* @returns boolean
function in_array_r($needle, $haystack, $strict = true) {
foreach ($haystack as $item) {
if (($strict ? $item === $needle : $item == $needle) || (is_array($item) && in_array_r($needle, $item, $strict))) {
return true;
return false;
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