Undefined variable, even when there isnt?

[dean7]

Hi all, Ive had alot of problem with one script latly but I carnt see what it accually causing the problems.

 

My script is giving me an error saying:

 

Notice: Undefined variable: carin in /home/www/*****.com/test/test.php on line 23

 

And:

 

Notice: Trying to get property of non-object in /home/www/*****.com/test/test.php on line 23

 

My Code:

 

$carin1 = mysql_query ("SELECT carid FROM users WHERE username='$username'") or die (mysql_error());			$carin = mysql_fetch_object($carin1);// Use function to make sure there in a car..function carcheck(){if ($carin->carid == ''){ // LINE 23echo ("You must be in a car before doing any races.");}else{echo ("You are currently in: $carin->carid");}exit();}	// End function		

 

 

Where its saying ive got an undefined variable carin I accually havent as it is defined. :S

 

Anyone see what is wrong with that part of my script?.

 

Thanks for your help.

[the182guy]

The function has no access to that variable unless you global it. Add this to the function:

 

 

global $carin;

 

 

See here for info about variable scope.

[dean7]

The function has no access to that variable unless you global it. Add this to the function:

 

 

global $carin;

 

 

See here for info about variable scope.

 

Where about to I add this to my function?

[taquitosensei]

right at the beginning. Is is supposed to $carin or is it $carin1?

[rwwd]

to clarify, either:-

 

function carcheck(){global $carin;if ($carin->carid == ''){ // LINE 23

 

 

or, pass it as a parameter into the function

 

 

function carcheck($carin){if ($carin->carid == ''){ // LINE 23

 

 

Simple!

 

Rw

[KevinM1]

Don't use 'global'.  Pass the value into the function through its argument list.