Undefined indexes

[AdRock]

I am trying to make my code free of errors and have come across a problem

 

If i set the php.ini error reporting to all i get these strange errors but if i disable error reporting, it works

 

These are the errors if i try submitting an empty form

[sat Mar 08 17:07:17 2008] [error] PHP Notice:  Undefined index:  password1 in d:\\Apache\\htdocs\\my car share\\pages\\inc\\register.inc.php on line 33

[sat Mar 08 17:07:17 2008] [error] PHP Notice:  Undefined index:  email2 in d:\\Apache\\htdocs\\my car share\\includes\\functions.php on line 127

[sat Mar 08 17:07:17 2008] [error] PHP Notice:  Undefined index:  password2 in d:\\Apache\\htdocs\\my car share\\includes\\functions.php on line 127

 

and if i enter some info in the form and submit for example postcode

[sat Mar 08 17:27:48 2008] [error] PHP Notice:  Undefined index:  password1 in d:\\Apache\\htdocs\\my car share\\pages\\inc\\register.inc.php on line 33

[sat Mar 08 17:27:48 2008] [error] PHP Notice:  Undefined index:  postcode in d:\\Apache\\htdocs\\my car share\\includes\\functions.php on line 127

[sat Mar 08 17:27:48 2008] [error] PHP Notice:  Undefined index:  email2 in d:\\Apache\\htdocs\\my car share\\includes\\functions.php on line 127

 

It seems to randomly change which variables have an undefined index

 

Here is my code with the variables

<?php
        
    if(isset($_POST['register'])) {
$register = $_POST['register'];
    }

    function check_form() { 

//set up some global variables to be passed between validation function and form
        global $_POST, $error, $print_again, $register, $message;
        global $first_name, $last_name;
        global $houseno, $street, $town, $county, $postcode, $telephone;
        global $email1, $email2, $username, $password1, $password2; 

//variables for checking the user's name
$first_name = $_POST['first_name'];
$last_name = $_POST['last_name'];

//variable for checking the user address and telephone
$houseno = $_POST['houseno'];
$street = $_POST['street'];
$town = $_POST['town'];
$county = $_POST['county'];
$postcode = $_POST['postcode'];
$telephone = $_POST['telephone'];

//variables for checking the user's email
$email1 = $_POST['email1'];
$email2 = $_POST['email2'];

//varaibles for checking the user login credentials
$username = $_POST['username'];
$password1 = $_POST['password1'];
$password2 = $_POST['password2'];

//set the error to false
$error['first_name'] = false;
$print_again = false;

 

and here is the error in the functions.php it's complaining about but i don't think it has anything to di with this

function error_bool($error, $field) { 
    if($error[$field]) { 
print("style=\"background-color:#FBEC87\""); 
    } 
    else {
print("style=\"background-color:white\"");
    }
}

 

Any ideas?

[BlueSkyIS]

"If i set the php.ini error reporting to all i get these strange errors but if i disable error reporting, it works"

 

i suggest not turning on all errors, or you'll see this all the time. the other alternative is to actually define every index and that would be a pain. there are error settings between ALL and NONE.

[Sulman]

Just out of interest what are the drawbacks (in server overheads etc) of not defining vars vefore using them?