[RESOLVED] Undefined Variable

[chrisguk]

Hi,

Never thought I would need to post here about undefined variables, normally they are easy to track down but this one has baffled me.

In the file named config.php I have this:

$sqlb = $mysqli->query("SELECT * FROM config"); 
if ($mysqli->connect_errno) {
    printf("Connect failed: %s\n", $mysqli->connect_error);
    exit();
}

if ($sqlb->num_rows > 0) {
	 while ($rowa = $sqlb->fetch_object())
    {		
			$url = $rowa->adminurl; 
			$email = $rowa->support_email; 
			$legal = $rowa->legal;
			$siteurl = $rowa->url; 
	}
} 

In the config.php file I have this:

function BASE_URL()

{
define('BASE_URL',$url);

}

I dont understand why $url is not defined when it appears as

$url = $rowa->adminurl; 

[Weedpacket]

function BASE_URL()

{
define('BASE_URL',$url);

} 

$url here is a variable local to the BASE_URL() function, and isn't to be confused with a different variable of the same name that might appear elsewhere.

[chrisguk]

Weedpacket;11003072 wrote:

function BASE_URL()

{
define('BASE_URL',$url);

} 

$url here is a variable local to the BASE_URL() function, and isn't to be confused with a different variable of the same name that might appear elsewhere.

But sure I need to tell the function what $url is first otherwise its undefined. Or should I be doing this instead:

function BASE_URL()
{

echo '$_SERVER['DOCUMENT_ROOT']';

}

or am I missing the point?

Can you see what I am attempting to do?

[vivek151189]

You can do something like this

function BASE_URL()

{
$url = $_SERVER['DOCUMENT_ROOT'];
define('BASE_URL',$url);

} 

[chrisguk]

The issue I have though is the $url should be defined already based on the data pulled from the database.

But its not!

[vivek151189]

did you get a value in

$url = $rowa->adminurl; 

[chrisguk]

This is the strange thing because when I do this:

<?echo $url; ?>

I get the correct output,

But when I want to turn $url into BASE_URL it states that the variable is underfined.

[Weedpacket]

chrisguk wrote:

But its not!

Because it's not the same variable; see the page I linked to for details. You never tell your function what value its $url variable is supposed to have; as a result, it doesn't have a value. This is why functions have parameters; to supply them with any values that they need.

[chrisguk]

Weedpacket;11003080 wrote:

Because it's not the same variable; see the page I linked to for details. You never tell your function what value its $url variable is supposed to have; as a result, it doesn't have a value. This is why functions have parameters; to supply them with any values that they need.

oops my bad 🙁

so instead could I just define the constant:

define(BASE_URL,$url);

or
define(BASE_URL,'http://www.mysite.com/')

[vivek151189]

JUST PASS THAT VARIABLE IN THE function BASE_URL()
something

function BASE_URL($url)

[vivek151189]

oops my bad

so instead could I just define the constant:

yes you can use the constant

define(BASE_URL,'http://www.mysite.com/')