multidimensionalArrayin_array.php

<?php
function in_multiarray($elem, $array) {
  $top = sizeof($array) - 1;
  $bottom = 0;
  while($bottom <= $top) {
    if($array[$bottom] == $elem)
      return true;
    else 
      if(is_array($array[$bottom]))
          if(in_multiarray($elem, ($array[$bottom])))
              return true;
                
    $bottom++;
  }        
  return false;
 }