问题描述

如何将php多维中的每一列数据转化为单列数组?

how get each single column data from php multidimensional into single column array?

like $_test = = array(
    array(
        'id' => 1001,
        'first_name' => 'kalpesh',
        'last_name' => 'gamit',
    ),
    array(
        'id' => 1002,
        'first_name' => 'kartik',
        'last_name' => 'patel',
    ),
    array(
        'id' => 2002,
        'first_name' => 'smith',
        'last_name' => 'Jones',
    ),
    array(
        'id' => 4004,
        'first_name' => 'patel',
        'last_name' => 'Doe',
    )
);

只需要像 id 或 first_name 这样的结果，而不需要像 while、foreach、for 等循环

want result like id OR first_name only without use loop like while, foreach, for etc

Array
(
    [0] => 1001
    [1] => 1002
    [2] => 2002
    [3] => 4004
)

推荐答案

像下面一样更新你的脚本并检查它，但它只能在 PHP 5.5 高于版本......

update your script like below and check it please but it will work only in PHP 5.5 greater than version only...

 $_test = = array(
    array(
        'id' => 1001,
        'first_name' => 'kalpesh',
        'last_name' => 'gamit',
    ),
    array(
        'id' => 1002,
        'first_name' => 'kartik',
        'last_name' => 'patel',
    ),
    array(
        'id' => 2002,
        'first_name' => 'smith',
        'last_name' => 'Jones',
    ),
    array(
        'id' => 4004,
        'first_name' => 'patel',
        'last_name' => 'Doe',
    )
);

$ids_only = array_column($records, 'id');
print_r($ids_only);

ID 的结果

Array
(
    [0] => 1001
    [1] => 1002
    [2] => 2002
    [3] => 4004
)

first_name 的结果

Results for first_name

$first_name = array_column($records, 'id');
print_r($first_name);
Array
(
    [0] => Kalpesh
    [1] => kartik
    [2] => smith
    [3] => patel
)

运行上面的php脚本，请检查....

run above php script and please check....

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