PHP Installation - Re: [PHP-INSTALL] namespace trouble

Author

Re: [PHP-INSTALL] namespace trouble

Keith Roberts

2007-05-31, 7:01 pm

Hi Pascal. You seem to have a problem with the scope of your
variables.

On Thu, 31 May 2007, Pascal Desroche wrote:

> To: Andy Stratton <astratton@compassinfo.net>
> From: Pascal Desroche <pascal@ker.org>
> Subject: Re: [PHP-INSTALL] namespace trouble
>
> Yes Anddy, i did this to get every kind of info i could. i
> just don't understand why this
>

<?php

//here you are declaring $example in the global scope.
$example = "php variable test";

PrintExample();

function PrintExample(){

// now you are trying to access a global variable
// inside a function
echo "$example";

}

?>

> Notice: Undefined variable example

to do this you need to use the global keyword inside the
function, like this:

function PrintExample() {

// tell php you want to access a global variable
global $example;

// or global $var1, $var2, ... etc

echo $example;

}

It's not good practice to access global variables like that
anyway. When you get onto OOP PHP then that would be
frowned upon.

Usually you would want to pass the global variable as a
parameter to the function, like this:

PrintExample('testing...');

function PrintExample($example) {
echo $example;
}

HTH

Keith

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Pascal Desroche

2007-05-31, 7:01 pm

thanx a lot Keith ;

Keith Roberts a =E9crit :
> Hi Pascal. You seem to have a problem with the scope of your=20
> variables.
>=20
> On Thu, 31 May 2007, Pascal Desroche wrote:
>=20
>=20
> <?php
>=20
>=20
> //here you are declaring $example in the global scope.
> $example =3D "php variable test";
>=20
>=20
> PrintExample();
>=20
> function PrintExample(){
>=20
> // now you are trying to access a global variable
> // inside a function
> echo "$example";
>=20
> }
>=20
> ?>
>=20
>=20
> to do this you need to use the global keyword inside the=20
> function, like this:
>=20
> function PrintExample() {
>=20
> // tell php you want to access a global variable
> global $example;
>=20
> // or global $var1, $var2, ... etc
>=20
> echo $example;
>=20
> }
>=20
> It's not good practice to access global variables like that=20
> anyway. When you get onto OOP PHP then that would be=20
> frowned upon.
>=20
> Usually you would want to pass the global variable as a=20
> parameter to the function, like this:
>=20
>=20
> PrintExample('testing...');
>=20
> function PrintExample($example) {
> echo $example;
> }
>=20
> HTH
>=20
> Keith
>=20
> ------------------------------------------------------------
> http://www.karsites.net
> http://www.raised-from-the-dead.org.uk
>=20
> This email address is challenge-response protected with
> http://www.tmda.net
> ------------------------------------------------------------
>=20

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