在其绝对最简单的情况下，2D维数组可以创建为：

 <？php 
 $ emptyArray = array（array（））; 
？> 
 

或者从PHP 5.4开始，您还可以使用：

 <？php 
 $ emptyArray = [[]]; 
？> 
 

I know that arrays are created dynamically, and creating them ahead of time isn't really necessary, but how would one do that with a 2D array? The same way?

(for$j)
{
for($i)
    {
    $array[j][i] = "data";
    }
}

Something like that? Obviously real for loops, of course.

At its absolute simplest, a 2D dimensional array can be created as:

<?php
    $emptyArray = array(array());
?>

Or as of PHP 5.4 you can also use:

<?php
    $emptyArray = [[]];
?>