代码编辑器：
x
1
2
3
function myfunction($a,$b)4
{5
if ($a===$b)6
{7
return 8
0;9
}10
return ($a>$b)?1:-1;11
}12
13
$a1 = array("a"=>"red","b"=>"green","c"=>"blue");14
$a2 = array("a"=>"red","b"=>"blue","c"=>"green");15
$result = array_udiff_assoc($a1,$a2,"myfunction");16
print_r($result);17