public function testUksort()
{
$function = function ($a, $b) {
$a = preg_replace('@^(a|an|the) @', '', $a);
$b = preg_replace('@^(a|an|the) @', '', $b);
return strcasecmp($a, $b);
};
$ar = new ArrayObject(array('John' => 1, 'the Earth' => 2, 'an apple' => 3, 'a banana' => 4));
$sorted = $ar->getArrayCopy();
uksort($sorted, $function);
$ar->uksort($function);
$this->assertSame($sorted, $ar->getArrayCopy());
}
