I am trying to create a multi dimensional array using this syntax:
我正在尝试使用以下语法创建多维数组：
$x[1] = 'parent';
$x[1][] = 'child';
I get the error: [] operator not supported for strings because it is evaluating the $x[1] as a string as opposed to returning the array so I can append to it.
我得到错误：[]运算符不支持字符串，因为它将$ x [1]作为字符串进行评估，而不是返回数组，因此我可以追加它。
What is the correct syntax for doing it this way? The overall goal is to create this multidimensional array in an iteration that will append elements to a known index.
这样做的正确语法是什么？总体目标是在迭代中创建这个多维数组，将元素附加到已知索引。
The syntax ${$x[1]}[] does not work either.
语法$ {$ x [1]} []也不起作用。
3 个解决方案
#1
24
The parent has to be an array!
父母必须是一个阵列！
$x[1] = array();
$x[1][] = 'child';
#2
5
$x = array();
$x[1] = array();
$x[1][] = 'child';
#3
1
I think what you want to do is to use $x['parent'] in the end, isn't it ?
我想你想要做的是最后使用$ x ['parent']，不是吗？
So it's not exactly $x = array() but more something like :
所以它不完全是$ x = array（）但更像是：
$x = array('parent' => array());
$x['parent'][] = 'child';
#1
24
The parent has to be an array!
父母必须是一个阵列！
$x[1] = array();
$x[1][] = 'child';
#2
5
$x = array();
$x[1] = array();
$x[1][] = 'child';
#3
1
I think what you want to do is to use $x['parent'] in the end, isn't it ?
我想你想要做的是最后使用$ x ['parent']，不是吗？
So it's not exactly $x = array() but more something like :
所以它不完全是$ x = array（）但更像是：
$x = array('parent' => array());
$x['parent'][] = 'child';