Array_unshift用于多维数组

Question

我试图将数组插入到多维数组中作为第一个元素。我的原始数组

的例子

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

然后我有了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" )
)

array_unshift在这种情况下似乎失败了。有没有比创建一个新数组并通过foreach循环插入每个子数组更好的解决方案?

Answer 1

array_unshift应该适合您。应该注意的是，该函数修改了传递给它的数组，并且不返回一个新数组，因此您应该而不是将返回值赋给数组变量。

正确的:

array_unshift($arr, $newArray);

不正确:

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