程式設計@筆記

[php]array_filter 使用函數過濾陣列的值

(PHP 4 >= 4.0.6, PHP 5)

官方範例：
<?php
function odd($var)
{
    return($var % 2 == 1);
}

function even($var)
{
    return($var % 2 == 0);
}

$array1 = array("a"=>1, "b"=>2, "c"=>3, "d"=>4, "e"=>5);
$array2 = array(6, 7, 8, 9, 10, 11, 12);

echo "Odd :\n";
print_r(array_filter($array1, "odd"));
echo "Even:\n";
print_r(array_filter($array2, "even"));
?>

Odd :
Array
(
    [a] => 1
    [c] => 3
    [e] => 5
)
Even:
Array
(
    [0] => 6
    [2] => 8
    [4] => 10
    [6] => 12
)