Laravel 8 data_set() {#collection-method}

data_set 函数使用「.」符号给多维数组或对象赋值：

$data = ['products' => ['desk' => ['price' => 100]]];

data_set($data, 'products.desk.price', 200);

// ['products' => ['desk' => ['price' => 200]]] 

这个函数也支持使用「*」作为通配符给相应键名赋值：

$data = [
    'products' => [
        ['name' => 'Desk 1', 'price' => 100],
        ['name' => 'Desk 2', 'price' => 150],
    ],
];

data_set($data, 'products.*.price', 200);

/*
    [
        'products' => [
            ['name' => 'Desk 1', 'price' => 200],
            ['name' => 'Desk 2', 'price' => 200],
        ],
    ]
*/ 

通常情况下，已存在的值将会被覆盖。如果只是希望设置一个目前不存在的值，你可以增加一个 false 作为函数的第四个参数：

$data = ['products' => ['desk' => ['price' => 100]]];

data_set($data, 'products.desk.price', 200, false);

// ['products' => ['desk' => ['price' => 100]]]