php 将任意二维数组转换一维数组(键值对)

<?php

$a = [
    [
        'id' => 33, // 这里的键名不固定
        'name' => 'aaa',
    ],
    [
        'id' => 22,
        'name' => 'bbb'
    ]
];

$dat = [];
foreach ($a as $b) {
    list($k, $v) = array_values($b);
    $dat[$k] = $v;
}

var_export($dat); // 输出：array ( 33 => 'aaa', 22 => 'bbb', )