In a search form with one button Search and one Field when i try to run the php file it always tells me "UNDEFINED VARIABLE".I have 2 variables(search area and list selection) and i think there is no problem with their definition.
Is there possible that PHP has been installed false?What is wrong?
The error you are saying is just a warning. You can avoid this by defining the variable.
$a=0; // $a is an integer
$b="" // $b is a string
Else you can just avoid that notice warning by editing the php.ini file.
You need to uncomment this line
error_reporting = E_ALL & ~E_NOTICE
This indicates that the messages will be given for all errors but no notice or warnings.
If you problem doesn't solve please post in you code.
Nope, that just how you access form parameters in php. They are stored in array variables. You'll use either the $_POST, $_GET, or $_REQUEST. There are a few useful variables like this. Check out http://us2.php.net/reserved.variables