[RESOLVED] global constants

AndreF

Hello,

I have some constants I want to global them to a function.
example:

define ("BLAH", "testing", true);

function something () {
global BLAH;
print (BLAH);
}
something;

but I get syntax error, unexpected T_STRING, expecting T_VARIABLE or '$'

so how to pass them to a func without using func parameter?

laserlight

Try:

<?php
define("BLAH", "testing", true);

function something () {
    echo BLAH;
}

something();
?>

There is no need to (or rather, you cannot) declare BLAH global in the function as it is a defined constant. Then you need to call something(), not randomly write something (pun intended) 🙂

NogDog

Or to put it simply: constants are always in the global scope.

Weedpacket

As the manual notes on its page about [man]constants[/man] (linked to from the [man]define[/man] page):

Like superglobals, the scope of a constant is global. You can access constants anywhere in your script without regard to scope.

The only caveat I can think of is that, unlike function names, constants only exist after they have been defined. May sound obvious, but function names are also automatically global in scope, but they're all defined from the moment the script starts running.

NogDog

Weedpacket wrote:
...function names are also automatically global in scope, but they're all defined from the moment the script starts running.

Unless they are defined within a conditional block of code which has not yet executed.

AndreF

Just a short note to thank all.