php - Undefined var warning msgs

Anon

I have the following program!
my script login.php starts with condition:

if(!isset($name) && !isset($password))
{
// show a user/login form with the action:
<form method = post action=login.php> //calls itself.
}

else {
// username/pass was entered, so authenticate...etc...
}

my problem is: the first time the page is loaded through a link, it gives
a warning: WARNING: Undefined Variables, name and password...
then it shows the form..how can i ignore the warning msgs? or any other way to do this..

thanks

junebug

try using this for your if statement:

if(!$name && !$password){
do stuff..
}

ace21

In the php.ini file there is a setting that allows you to set up what warnings and errors will be displayed. I can't remeber exactly what it's called but you can't miss it if you scroll throught the document. There's explanations on each of the different settings.

Ace21

[deleted]

Nope, that won't work.
You should never check the existance of a var by

if (!$var)
{
echo "var doesn't exist";
};

Why? because this IF statement checks the value of the var.
Vars only have values if they are set. If the var is not set, this statement will generate a warning.
Moreover, if you used this method to check wether a counter was set, you'd get 'var not set' when you set the counter with value zero.

But,

if(!isset($name) && !isset($password))

You may want to change the && to || because you need both the vars to be set.
You want to print the form when either var is NOT set, or when both vars ARE set.

[deleted]

You can set it at runtime using error_reporting(E_ALL)

Note: when you're developing a PHP script, it's best to set the error reporting as HIGH as possible.

If you set it so that it doesn't report unset variables, you will spend hours debugging a script only to find out that you forgot to fill a certain variable. (which error_reporting would have warned you about).
It will happen, don't think you're experienced enough to prevent that. :-)

Anon

Thanks guys..but the isset() still returns a warning:
undefined variable.
do you think it is because...i have a html file called
login.html that has a link called LOGIN, and then it calls login.php ??

I am thinking..the problem is happening because i am not executing login.php directly.... but i am using this stupid Personal Webserver which does not allow any php file to be directly executed....(don't ask why my work doesn't want to install linux/apache or NT/IIS) they cheap! lol..and this is a small project 🙂

[deleted]

isset() can't return a warning.
If there is a warning it's probably from somewhere else in the script.

Anon

Thanks everyone...
You are right vincent, warning was coming from the SELECT statement
where i was passing $name and $password w/o checking them with isset() function....i added if(isset($name) && isset($password) then do query...
it worked 🙂

Thanks once again