function question

[ngreenwood6]

I have a quick question that I am confused about. I am trying to set a variable inside of a function and make it stick within that page. Here is an example:

 

<?php

$my_data = "not there";

this_data($my_data);

function this_data($data)
{
$data = "hello";
my_data($data);
}

function my_data($data)
{
$my_data = $data;
}

echo $my_data;

?>

 

However I want $my_data to return "hello" instead of "not there". Any help is appreciated.

[cunoodle2]

It will stay within the function unless you return something.  You can always return an array if you want to have more values sent out.

 

<?php

$my_data = "not there";

$my_data = this_data($my_data);

function this_data($data)
{
$data = "hello";
return my_data($data);
}

function my_data($data)
{
$my_data = $data;
return $my_data;
}

echo $my_data;

?>

 

I changed about 4 lines of code in there.  Let me know if that works for you.

[ToonMariner]

its all about scope...

[ngreenwood6]

Sorry but I dont think I gave enough information. The this_data() function I am not able to run. However when this runs I want to be able to get the data variable contains before it is finished running that function. I want it to be accessible throughout the whole page. Something like this:

 

<?php
$my_data = "hello";

function this_data($data)
{
$some_data = "world"; // need this before it is run
get_data($data);
$some_data = "not now";
}

function get_data($data)
{
$my_data = $data;
}

echo $my_data; // should be world

[ngreenwood6]

Someone has to know how I can declare a variable inside of a function and make it available outside of the function!

[Ken2k7]

Why would you do that?

[Philip]

Use of global, see Toon's post.

[gevans]

<?php
function this_data($data) {
    $some_data = "world"; // need this before it is run
    return $some_data = "not now";
}

$my_data = this_data('a pointless string');

echo $my_data; // should be world

 

As KingPhilip said you want to use a global, or you could pass a variable as reference.

[Ken2k7]

No, it should be "not now"

[ngreenwood6]

Ok I dont think any of you are actually reading the post. I do not have access to the function. It is being called from another page and I do not want to mess with that function. However there is a variable that is used inside of there that I want to use somewhere else on that page. I do not get the globals thing. I tried it and it doesnt seem to work.

 

$my_string = "hello";

function this_data()
{
$my_data = "world";
global $my_string;
$my_string = $my_data;
}
echo $my_string; // should be world

 

Still is outputting "hello"

[gevans]

No, it should be "not now"

 

I didn't change his comments, I'm not sure he understand what he wants anyway.

 

And yes, we are reading your posts, if you read some of ours you would've come up with this solution already, in actual fact you, have, you're just not calling the function.....

 

 

[Ken2k7]

You never called the function. :-\

 

Edit - beat by gevans.

[ngreenwood6]

thats what your not understanding I am not calling that function. It is getting called on another page by something else. I just want to use the variable on the page that the function resides on.

[Ken2k7]

Well then if it's called by another page, what's the problem? In your example, it's never called. If some other page calls, it, I think it should be fine.

[gevans]

Make sure you're calling it before you echo the variable, otherwise it obviously wont have been changed.

 

That's like driving to a gas station and asking why the tank is empty before you fill it up, think about it!

[Ken2k7]

That's like driving to a gas station and asking why the tank is empty before you fill it up, think about it!

That was horrible. I think you screwed up what you were trying to say.

[gevans]

hahaha,

 

should've read....

 

That's like driving to a gas station and asking why the tank isn't full before you fill it up

[Ken2k7]

Still not the same. It has to have the "you created it but you never used it" kind of thing. It's like getting into your car, stepping on the gas pedal with no keys. It just doesn't happen by itself.

[allworknoplay]

lol you guys are cruel....

[gevans]

Actually, if you go by original comment

 

Make sure you're calling it before you echo the variable, otherwise it obviously wont have been changed.

 

What I was saying is you have a starting point and an end point. You can't expect the end point to have happened before you change anything (before you call the function, before you fill up your car).

 

The analogy stands

[Ken2k7]

lol you guys are cruel....

Sorry ngreenwood6.

[ngreenwood6]

I am not echoing the variable and yes I am making sure that I am assigning it before actually using it.

[Ken2k7]

Is this related to the other topic about the email thing? If so, I can seriously help you out, but I need to know the original PM message.

[ngreenwood6]

Yeah this is related to the other topic. Here is the email:

 

Hello nick, the topic "testt" at "mysite" has received a new reply

since your last visit. You can view this post by clicking on the following

link:

http://mysite.com/forums/viewtopic.php?f=85&t=621&p=3078&e=3078

 

Topic: testt

Author: Rukus

Message:

 

 

 

If you want to view the topic, click the following link:

http://mysite.com/forums/viewtopic.php?f=85&t=621

 

If you no longer wish to watch this topic, either click the "Unsubscribe

topic" link found in the forum above, or click the following link:

 

http://mysite.com/forums/viewtopic.php?uid=53&f=85&t=621&unwatch=topic

--

Thanks, The Team

[Ken2k7]

Just so we're on the same page, are you viewing functions_postings.php? And also, what phpBB version are you working with?