Help with functions and.. global variables?

Well, I need to create a variable that will be updated inside one of my functions.

Say I had..

index.php

<?php

include 'functions.php';

$var1 = "Hello";

test();

echo $var1;

?>

Code (markup):

Functions.php

<?php 

function test() {
  $var1 = "Bye";
}

?>

Code (markup):

But it doesn't update my variable

Suggestions?

Thanks

 

Go find out about scope.

If you want a quick fix:

function test() {
  global $var1;
  $var1 = "Bye";
}

PHP:

 

you can also pass the variable by reference to the function:

function test(&$var1) {
  $var = "Bye!";
}

PHP:

if you run the function like this:

$var = "Hi";

test($var);

echo $var; // will output "Bye!"

PHP:

 

Yeah I would also recomend passing by reference to functions when you need that value modified and returned. It's a memory saver too.

 

not to budge in here, but what if you had say 7 variables to reference?

 

Then you should send the files containing your code onto a USB drive or a CD and then burn it. Smash whatever remains using a hammer, preferably a large one.

 

Then just puss them into an array and reference that array

 

Ok cool, thanks everyone

 

oh, before i forget: always pass a variable to the function, not just a string or array. For instance this won't work:

test ( array('a', 'b', 'c') );

PHP:

php will throw an error, as it can't update the value of the variable (because there is no value )