《PHP-运用回调函数实现数组的筛选》

1, "222"=>2, "333"=>3, "444"=>4, "555"=>5);
$nums2 = $nums1;

echo "
";
echo "Odd :\n";
//回调函数，如果返回true则将$array1中的数据再赋给原数组，键保持不变
print_r(array_filter($nums1, "odd"));
echo "
";

echo "
";
echo "Even:\n";
print_r(array_filter($nums2, "even"));
echo "
";

?>