php global variables help

i ask for one question:

how can i modify a global variable
for example i have some like that:
<?php
$global_var=5

if(something)
$global_var=0;
else
$global_var=10;

display();

function display()
{
global $global_var;
echo $global_var;

}

?>


the result should be 0 or 10 but in my case is 5;
What should i do?

instead of having

if(something)


try this

if($global_var)

I'm not sure whats wrong, because for me, the script works as you expected it would.

Post a specific code example?

-Jeff S