how do I make a variable global

[windandwaves]

Hi Folk

Consider this:

---foo1.php
$myvar = 10;

--- foo2.php
require_once("f oo1.php");

function funky {
echo $myvar;
}

from my experience, funky does not print 10. How do I make $myvar "global"
(not sure if this is the right word) so that it shows everywhere.

[Steve]

Re: how do I make a variable global

On Sun, 08 Jan 2006 10:33:00 +1300, windandwaves wrote:
[color=blue]
> Hi Folk
>
> Consider this:
>
> ---foo1.php
> $myvar = 10;
>
> --- foo2.php
> require_once("f oo1.php");
>
> function funky {
> echo $myvar;
> }
>
> from my experience, funky does not print 10. How do I make $myvar "global"
> (not sure if this is the right word) so that it shows everywhere.[/color]

A search on global might have helped (:
<?

$myvar = 10;

function funky ()
{
global $myvar;
echo $myvar;
}

funky ();
?>

[windandwaves]

Re: how do I make a variable global

Steve wrote:[color=blue]
> On Sun, 08 Jan 2006 10:33:00 +1300, windandwaves wrote:
>[color=green]
>> Hi Folk
>>
>> Consider this:
>>
>> ---foo1.php
>> $myvar = 10;
>>
>> --- foo2.php
>> require_once("f oo1.php");
>>
>> function funky {
>> echo $myvar;
>> }
>>
>> from my experience, funky does not print 10. How do I make $myvar
>> "global" (not sure if this is the right word) so that it shows
>> everywhere.[/color]
>
> A search on global might have helped (:
> <?
>
> $myvar = 10;
>
> function funky ()
> {
> global $myvar;
> echo $myvar;
> }
>
> funky ();[/color]

Thanks Steve,

Sorry, yes, I did do the search on global, but I never really understood it
very well. Thank you again.

[Iván Sánchez Ortega]

Re: how do I make a variable global

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windandwaves wrote:
[color=blue]
> function funky {
> echo $myvar;
> }[/color]

function funky {
echo $GLOBALS['myvar'];
}


But, as you may already know, global variables are the dirty and bad way of
doing stuff... reconsider passing parameters.

- --
- ----------------------------------
Iván Sánchez Ortega -i-punto-sanchez--arroba-mirame-punto-net

http://acm.asoc.fi.upm.es/~mr/

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[cliff smith]

Re: how do I make a variable global

windandwaves wrote:[color=blue]
> Hi Folk
>
> Consider this:
>
> ---foo1.php
> $myvar = 10;
>
> --- foo2.php
> require_once("f oo1.php");
>
> function funky {
> echo $myvar;
> }
>
> from my experience, funky does not print 10. How do I make $myvar "global"
> (not sure if this is the right word) so that it shows everywhere.
>
>[/color]

Variables outside a function are not directly available inside a
function. This is by design.
Ways to make the function "funky" work.

function funky() {
echo $GLOBALS['myvar'];
}
funky();

OR better, pass the variable to funky -

function funky( $func_var ) {
echo $func_var;
}
funky($myvar);

Hope this helps,
Cliff.

[windandwaves]

Re: how do I make a variable global

Iván Sánchez Ortega wrote:[color=blue]
> But, as you may already know, global variables are the dirty and bad
> way of doing stuff... reconsider passing parameters.[/color]

Yes, I know, but the variable I am using is a variable that should really be
a define("myvar", "xxx");

The reason i am using a variable is that these are easier to customise. I
have file with standard values and then a config file that overrides any
variable that should be customised for a particular application. Defined
constants can only be defined once.

Hope that makes sense


Nicolaas

[Chung Leong]

Re: how do I make a variable global

Yeah, down with globalization!

[Iván Sánchez Ortega]

Re: how do I make a variable global

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windandwaves wrote:
[color=blue]
> The reason i am using a variable is that these are easier to customise. I
> have file with standard values and then a config file that overrides any
> variable that should be customised for a particular application. Defined
> constants can only be defined once.
>
> Hope that makes sense[/color]

No. Using global variables for configuration directives do not make sense.
Ever. Using a singleton design pattern and static methods do, however.

It's not about working or not-working code: it's about modular or
non-modular code. Please keep all your config directives apart of the rest
of the variables. It may save you from some headaches.

- --
- ----------------------------------
Iván Sánchez Ortega -i-punto-sanchez--arroba-mirame-punto-net

Trying to make bits uncopyable is like trying to make water not wet.
-- Bruce Schneier
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[Dana Cartwright]

Re: how do I make a variable global

"windandwav es" <winandwaves@co ldmail.com> wrote in message
news:_3iwf.1354 1$vH5.701435@ne ws.xtra.co.nz.. .[color=blue]
> The reason i am using a variable is that these are easier to customise. I
> have file with standard values and then a config file that overrides any
> variable that should be customised for a particular application. Defined
> constants can only be defined once.
>[/color]

While you can't DEFINE something more than once, you can test to see if
something is already defined, and this enables you can use a system of
overrides.

I use two files, one containing overriding defines, and one containing the
default or factory values.

Let's say you want to override the value of 'FOO'. In your override file,
you say:

define( 'FOO' , 'myFoo' );

In the main configuration file, 'foo' is defined like this:

if ( !defined( 'FOO' ) )
define( 'FOO' , 'bar' );

which only defines 'FOO' if it's not already defined in the override file.

You have to INCLUDE your overriding defines file first.

[windandwaves]

Re: how do I make a variable global

Dana Cartwright wrote:[color=blue]
> "windandwav es" <winandwaves@co ldmail.com> wrote in message
> news:_3iwf.1354 1$vH5.701435@ne ws.xtra.co.nz.. .[color=green]
>> The reason i am using a variable is that these are easier to
>> customise. I have file with standard values and then a config file
>> that overrides any variable that should be customised for a
>> particular application. Defined constants can only be defined once.
>>[/color]
>
> While you can't DEFINE something more than once, you can test to see
> if something is already defined, and this enables you can use a
> system of overrides.
>
> I use two files, one containing overriding defines, and one
> containing the default or factory values.
>
> Let's say you want to override the value of 'FOO'. In your override
> file, you say:
>
> define( 'FOO' , 'myFoo' );
>
> In the main configuration file, 'foo' is defined like this:
>
> if ( !defined( 'FOO' ) )
> define( 'FOO' , 'bar' );
>
> which only defines 'FOO' if it's not already defined in the override
> file.
> You have to INCLUDE your overriding defines file first.[/color]

Hmm, thank you for that. That is a great idea. I actually use this concept
now, and I dont even think you need to add the if ( !defined( 'FOO' ) )
bit because, once defined, you can not redefine items.