分解数组，以便每个第二个元素位于不同的数组中

Question

因此，我想采用一个“未排序”数组，并从“未排序”数组中取出第二个元素，然后将其放入一个新数组中，所以剩下的就是两个数组。$unsorted = array("present","Bob","late","Jessie","late","Carl","present","Jessica","absent","Adam","present","Hope");我想创建一个for循环，但是找不到任何函数来创建两个数组。任何帮助将不胜感激，谢谢！

Answer 1

一种选择是使用经典foreach循环。

$unsorted = array("present","Bob","late","Jessie","late","Carl","present","Jessica","absent","Adam","present","Hope");

$array1 = array();

$array2 = array();

foreach( $unsorted as $key => $val ) {

    if ( $key % 2 ) $array2[] = $val;

    else $array1[] =  $val;

}

$array1 将导致：

Array

(

    [0] => present

    [1] => late

    [2] => late

    [3] => present

    [4] => absent

    [5] => present

)

$array2 将导致：

Array

(

    [0] => Bob

    [1] => Jessie

    [2] => Carl

    [3] => Jessica

    [4] => Adam

    [5] => Hope

)

Answer 2

很简单，但需要一些理解：

$unsorted = array("present","Bob","late","Jessie","late","Carl","present","Jessica","absent","Adam","present","Hope");

$sorted = array_map(null, ...array_chunk($unsorted, 2));

print_r($sorted);