- var_dump: documentation ( source)
- strcmp: documentation ( source)
- array_udiff: documentation ( source)
<?php
function compare($a, $b)
{
echo("$a : $b\n");
return strcmp($a, $b);
}
$a = array('a', 'b', 'c');
$b = array('x', 'y', 'z');
var_dump(array_udiff($a, $b, 'compare'));