Hi all...


How to define a global variable in PHP?

Thanks...

Hi all...


If you want variables defined out side the function to be accessed inside the function scope then you have make them global inside the fuction. You can use the global term.


<?php

$integer_var = 3;

function print_var(){
global $integer_var;

// echos 3 on the screen
echo $integer_var;
}

print_var();

?>

Thanks...

Hi,

You can use also $GLOBALS instead of global.

For eg:
<?php
$a = 1;
$b = 2;

function Sum(){
$GLOBALS['c'] = $GLOBALS['a'] + $GLOBALS['b'];
}

Sum();
echo $c;
?>

I think this method very useful for some times.

Thanks & Regards,
R.Kamalakannan.

Hi,

The scope of a variable is the context within which it is defined. For the most part all PHP variables only have a single scope. This single scope spans included and required files as well. For example:

First, an example use of global:

<?php
$a = 1;
$b = 2;

function Sum()
{
global $a, $b;

$b = $a + $b;
}

Sum();
echo $b;
?>

__________________
Venkat
knowledge is Power