Trovare valore massimo array

[n0t]

<?php

static $maxValue = 0;

$array = array(1,2,3,4,5,6,7);

function getMaximum($item, $key) {
  $maxValue = ($item >$maxValue) ? $item : $maxValue;
}

array_walk_recursive($array, 'getMaximum');

?>