如何在php中调用全局动态变量

Question

I try to find the solution since many hours, but I can't solve it (I'm not a programmer ;)).

On a function, I have set a dynamic array which I want to use in another function. To do this, I thought to use $GLOBALS[] array I have no problem to call the variable out of the function one, but when I try to use it in function 2, it doesn't works.

Here is my code :

function one($name,$a,$b,$c)
{
// $GLOBALS[${$name}] = array($a,$b,$c);
global $$name;
$$name = array($a,$b,$c);
}



function two($name)
{
$name="D1";
echo ${$name}[1];
}

one("D1",10,20,30);
one("D2",100,200,300);
two("D1");      // doesn't works


$name="D1";
echo ${$name}[1];   // works, gives 20
$name="D2";
echo ${$name}[1];   // works, gives 200

It doesn't works and I do not understand why. Thanks for your help.

Etienne

Answer 1

<?php

function one($name,$a,$b,$c)
{
    global $$name;
    $$name = array($a,$b,$c);
}

function two($name)
{
    global $$name;
    echo ${$name}[0];
}

one("D1",10,20,30);
two("D1"); 

The scope of your function is different to the global scope.