gistfile1.php

#!/usr/bin/php
<?php

function find_person($value, $key, $search_term)
{
    if($value == $search_term){
        print "Found $search_term in $key\n";
        return $the_person_id_in_the_same_array_as_this_term;
    }
}

$AoH = array( 
    'name' => 'beavis',
    'person_id' => 'bvs',
    'children' => array( 'name' => 'butthead', 'person_id' => 'bth' ),
);

$the_person_id_i_want = array_walk_recursive($AoH, 'find_person', 'cornholio');