require/include: constant vs. variable

[pimmy]

Hi,

I am stuck with a silly problem which I cant resolve. Please look at the example:

settings.php
[code=php]
<?php
define('VALUE_S TRING', 'This is my string');
$VALUE_ARRAY = array('This', 'is', 'my', 'array');
?>
[/code]

values.class.ph p
[code=php]
<?php
Class Values
{
/* Here I have some constructor */

public function getValues() {

error_log("Firs t: " . VALUE_STRING);
error_log("Seco nd: " . implode(', ', $VALUE_ARRAY));
}
?>
[/code]
index.php
[code=php]
<?php
$values = new Values();
$values->getValues();
?>
[/code]

When I execute index.php I get the following in the error log:

[Fri Nov 02 11:57:59 2007] [error] [client 9.196.182.69] First:  This is my string
[Fri Nov 02 11:57:59 2007] [error] [client 9.196.182.69] PHP Notice:  Undefined variable: VALUE_ARRAY in /usr/local/apache/htdocs/values.class.php on line 9
[Fri Nov 02 11:57:59 2007] [error] [client 9.196.182.69] PHP Warning:  implode() [<a href='function.implode'>function.implode</a>]: Bad arguments. in /usr/local/apache/htdocs/values.class.php on line 9
[Fri Nov 02 11:57:59 2007] [error] [client 9.196.182.69] Second:

Does anyone know why I cant get the array values, but I can get the constant?

Cheers,

Pimmy

[code green]

A constant has global scope whereas variables and arrays do not.

[pimmy]

A constant has global scope whereas variables and arrays do not.

What about having inlude/require line at the beginning?

values.class.ph p
[code=php]
<?php
require_once(se ttings.php);

Class Values
{
/* Here I have some constructor */

public function getValues() {

error_log("Firs t: " . VALUE_STRING);
error_log("Seco nd: " . implode(', ', $VALUE_ARRAY));
}
?>
[/code]

I thought that this would be enough to make the array visible to the function, but aparently it makes no difference. Still get the same error.

Cheers,

Pimmy

[code green]

What about having inlude/require line at the beginning?

Any file that includes settings.php can see the array, but a function or class is a seperate entity again.
If you want a function or class method to see the array it has to be included inside the function.
But normally you would simply pass the variable name in to the function as a parameter

[pimmy]

It is quite interesting, but this doesnt work either:

<?php
Class Values
{
/* Here I have some constructor */

public function getValues() {

require_once(settings.php);

error_log("First: " . VALUE_STRING);
error_log("Second: " . implode(', ', $VALUE_ARRAY));
}
?>

[pimmy]

Quite interesting, but this doesnt work either:

<?php
Class Values
{
/* Here I have some constructor */

public function getValues() {

require_once(settings.php);

error_log("First: " . VALUE_STRING);
error_log("Second: " . implode(', ', $VALUE_ARRAY));
}
?>

[Atli]

Hi pimmy.

Please use [code] tags when posting code. It makes it much easier to understand your code.

As to your problem.
You could use the global keyword.

[pimmy]

Hi pimmy.

Please use [code] tags when posting code. It makes it much easier to understand your code.

As to your problem.
You could use the global keyword.

Ooops, sorry. Rushed into the forum without checking the features.
Thanks for the tip, I will give the GLOBAL flag a try.

cheers,
Pimmy

[code green]

[PHP]<?php
Class Values
{
/* Here I have some constructor */

public function getValues() {

require_once(se ttings.php);

error_log("Firs t: " . VALUE_STRING);
error_log("Seco nd: " . implode(', ', $VALUE_ARRAY));
}
?>[/PHP]I can't see why this won't work, unless settings.php is included eleswhere in the script.
I think 'once' has global scope throughout the script.

[pimmy]

For some reason it behaves like that. I've tried only require as well, and got the error for already defined constants.

I will try GLOBAL, looks promissing.

Have a great weekend guys.

[code green]

When I was at universtity use of globals was punishable by public flogging.
C; C++; VB etc