About global variables in PHP

Question

Hello everyone, I read online the difference between the $_GLOBALS superglobal array and the global variables defined by global. The differences are as follows: $GLOBALS['var'] is the external global variable itself. global $var is the reference to the external $var variable of the same name. References or pointers are not real assignments, so I tried it. The code is as follows: <?php $var1 = 1;
function test(){&n

高洛峰 · Answer

In PHP, the function inside is always a private variable. Global generates an alias variable in the function that points to the external variable of the function, rather than a simple reference or pointer to the external variable with the same name