array_unshift用于多维数组

Question

我试图将数组作为第一个元素插入到多维数组中.我的原始数组的示例

Array (
    0 => array ( "point1.0" => "some data", "point2.0" => "some data" )
    1 => array ( "point1.1" => "some data", "point2.1" => "some data" )
)

然后我将要插入的数组作为第一个元素

$newArray = array("point1.2" => "some data", "point2.2" => "some data" )

我的结果应该是

Array (
    0 => array ( "point1.2" => "some data", "point2.2" => "some data" )
    1 => array ( "point1.0" => "some data", "point2.0" => "some data" )
    2 => array ( "point1.1" => "some data", "point2.1" => "some data" )
)

在这种情况下,array_unshift似乎失败了.有没有比创建新数组和通过foreach循环插入每个子数组更好的解决方案？

Answer 1

array_unshift应该适合你.应该注意的是,函数修改传递给它的数组并且不返回新数组,因此不应该将返回值赋给数组变量.

正确:

array_unshift($arr, $newArray);

不正确:

$arr = array_unshift($arr, $newArray);