when reading other people"s code in the material, I found a way to assign values to php two-dimensional arrays. Here is a simple example
$call["a"][]="1";
$call["a"][]="2";the result of this assignment is
array (size=1)
"a" =>
array (size=2)
0 => string "1" (length=1)
1 => string "2" (length=1)I want to know what the principle is.
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this has nothing to do with two-dimensional arrays, which can be written as $arr [] = 'specific value', which can be understood as a process of stacking, and the subscript will be added in the order of 0, 1, 2, etc. (if it is originally a non-associative subscript)
this has nothing to do with the principle, right? Array basic assignment. It is generally used to append elements through the body of the loop.
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