如何用=> php (Laravel)制作数组

$array = [
    'key1' => 'value1',
    'key2' => 'value2',
    'key3' => 'value3'
];

// 添加元素
$array['key4'] = 'value4';

// 修改元素
$array['key2'] = 'new value2';

// 删除元素
unset($array['key3']);

$array = [
    'key1' => [
        'subkey1' => 'value1',
        'subkey2' => 'value2'
    ],
    'key2' => [
        'subkey3' => 'value3',
        'subkey4' => 'value4'
    ]
];

// 访问元素
echo $array['key1']['subkey1']; // 输出：value1

// 修改元素
$array['key2']['subkey3'] = 'new value3';