Prev: recursive
Next: MySQL Query Puzzle
From: David Mehler on 18 Jul 2010 18:37
Hello,
I've got a file with a variable declared in it. For purposes of this post:

$name = $_POST['name'];

Now a little later in the same file I have a custom function call that
outputs some information. In that information is an echo statement
outputting $name:

echo $name;

I'm wondering do I have to have $name declared as a global variable
within that function? For example:

function customFunction() {
global $name
}

I've tried it both ways and both ways it works, with and without the
global statement. I was under the impression that to be useful in a
function variables outside were not accessible.
Thanks.
Dave.
From: Paul M Foster on 18 Jul 2010 22:11
On Sun, Jul 18, 2010 at 06:37:30PM -0400, David Mehler wrote:

> Hello,
> I've got a file with a variable declared in it. For purposes of this post:
>
> $name = $_POST['name'];
>
> Now a little later in the same file I have a custom function call that
> outputs some information. In that information is an echo statement
> outputting $name:
>
> echo $name;
>
> I'm wondering do I have to have $name declared as a global variable
> within that function? For example:
>
> function customFunction() {
> global $name
> }
>
> I've tried it both ways and both ways it works, with and without the
> global statement. I was under the impression that to be useful in a
> function variables outside were not accessible.
> Thanks.
> Dave.

Variables declared outside a function are visible outside the function.
Variables declared inside a function are visible only within that
function. To use a "global" variable inside a function, you must declare
it global, as:

global $globalvar;

Paul

--
Paul M. Foster
From: Shreyas Agasthya on 19 Jul 2010 04:07
My two cents on this one.

Modify the $name within the function and print it.

Modify the$name outside the function (means the non-global-declared $name)
and print it. You will know the difference.

--Shreyas

On Mon, Jul 19, 2010 at 7:41 AM, Paul M Foster <paulf(a)quillandmouse.com>wrote:

> On Sun, Jul 18, 2010 at 06:37:30PM -0400, David Mehler wrote:
>
> > Hello,
> > I've got a file with a variable declared in it. For purposes of this
> post:
> >
> > $name = $_POST['name'];
> >
> > Now a little later in the same file I have a custom function call that
> > outputs some information. In that information is an echo statement
> > outputting $name:
> >
> > echo $name;
> >
> > I'm wondering do I have to have $name declared as a global variable
> > within that function? For example:
> >
> > function customFunction() {
> > global $name
> > }
> >
> > I've tried it both ways and both ways it works, with and without the
> > global statement. I was under the impression that to be useful in a
> > function variables outside were not accessible.
> > Thanks.
> > Dave.
>
> Variables declared outside a function are visible outside the function.
> Variables declared inside a function are visible only within that
> function. To use a "global" variable inside a function, you must declare
> it global, as:
>
> global $globalvar;
>
> Paul
>
> --
> Paul M. Foster
>
> --
> PHP General Mailing List (http://www.php.net/)
> To unsubscribe, visit: http://www.php.net/unsub.php
>
>


--
Regards,
Shreyas Agasthya
From: Simcha Younger on 19 Jul 2010 04:28




On Mon, 19 Jul 2010 13:37:12 +0530
Shreyas Agasthya <shreyasbr(a)gmail.com> wrote:

> My two cents on this one.
>
> Modify the $name within the function and print it.
>
> Modify the$name outside the function (means the non-global-declared $name)
> and print it. You will know the difference.
>
> --Shreyas
>
> On Mon, Jul 19, 2010 at 7:41 AM, Paul M Foster <paulf(a)quillandmouse.com>wrote:
>
> > On Sun, Jul 18, 2010 at 06:37:30PM -0400, David Mehler wrote:
> >
> > > Hello,
> > > I've got a file with a variable declared in it. For purposes of this
> > post:
> > >
> > > $name = $_POST['name'];

> > >
> > > I'm wondering do I have to have $name declared as a global variable
> > > within that function? For example:
> > >
> > > function customFunction() {
> > > global $name
> > > }
> > >
> > > I've tried it both ways and both ways it works, with and without the
> > > global statement. I was under the impression that to be useful in a
> > > function variables outside were not accessible.
> > > Thanks.
> > > Dave.



It sounds like 'register globals' is turned on in your php.ini, and therefore $name will be visible everywhere, since it is taken from $_POST['name'].

--
Simcha Younger <simcha(a)syounger.com>
 | 
Pages: 1
Prev: recursive
Next: MySQL Query Puzzle