global vars with functions

[Anon]

New bie needs help =)

if i use a function in PHP ex

$var = "hello";
function add_to_var () {
$var .= " World!";
}

would that work with out passing any vars between ()?

as i said i'm VERY new to PHP thx for any and all help

[webmaster02]

hi,

When creating a variable in a function, you must make it a GLOBAL variable first because all variables in a function are destroyed once the function ends.

What will you be using this for? I am sort of confused becuase why would you need to create a function for appending to a variable?

What would be better would be for you to put the variable in the parenthesis of the function (this is confusing) ie:

$var = "hello";

function add_to_var ($var) {

$var_add = " World!";

$var_return = $var.$var_add;

return $var_return;
}

So, to call this function, you would use this method:

$var1 = add_to_var( $var );

or

print add_to_var( $var );

This, I think, would be a better method.

If you need more clarification, or I was doing something wrong, just email mee at brad_at_getcoded_.net (replace at for the @ and get rid of underscores. I just dont want spammers to be overflowing my email box.)

Hope that this helps!

Brad Taylor
Senior Web Producer
BradCom Industries LTD

[Anon]

well the thing is i need to pass like 50 or more vars to a certian area

i can do this in perl using sub {} but i'm trying to convert a perl script to PHP

[yelvington]

Read carefully: http://www.php.net/manual/en/language.variables.scope.php

Variable scoping in PHP works differently than in many other languages. A function cannot "see" variables that are not declared within the function as globals. The compiler will assume that you mean instead to create a temporary variable that is visible only to the function.

Your example should be rewritten like so:

$var = "hello";
function add_to_var () {
global $var;
$var .= " World!";
}

Now you can call the function and echo $var, and you'll get the result you were looking for.

[webmaster02]

All you want to do is add to a variable? Just use the script that I gave you and that should work:

$var = "hello";

function add_to_var ($var) {

$var_add = " World!";

$var_return = $var.$var_add;

return $var_return;
}

So, to call this function, you would use this method:

$var1 = add_to_var( $var );

or

print add_to_var( $var );

its pretty simple