【php】將多個一維數組相同鍵的值快速組成一個數組並返回一個二維數組

<?php
$a = array(1, 2, 3, 4, 5);
$b = array("one", "two", "three", "four", "five");
$c = array("uno", "dos", "tres", "cuatro", "cinco");

$d = array_map(null, $a, $b, $c);
print_r($d);
?>

以上例程會輸出：

Array
(
    [0] => Array
        (
            [0] => 1
            [1] => one
            [2] => uno
        )

    [1] => Array
        (
            [0] => 2
            [1] => two
            [2] => dos
        )

    [2] => Array
        (
            [0] => 3
            [1] => three
            [2] => tres
        )

    [3] => Array
        (
            [0] => 4
            [1] => four
            [2] => cuatro
        )

    [4] => Array
        (
            [0] => 5
            [1] => five
            [2] => cinco
        )

)

傳入兩個及以上的數組時，它們元素數量將會相同。因為回調函數會並行地處理相互對應的元素。 如果幾個數組的元素數量不一致：空元素會擴展短那個數組，直到長度和最長的數組一樣。