Help understanding error code

KeyIDentity

Notice: Undefined index: submit in C:\wamp\www\Learn.php on line 6

The line above appeared when I tried to pull up the file on local host and the table input section had the following already in it:

Notice: Undefined index: username in C:\wamp\www\Learn.php on line 19

Let me know if you need to see the code

PLEASE HELP!

johanafm

I'm guessing you have code like

// do stuff with form post
$_POST['submit']

// display form

Which means that when you view the form the first time, there is no post data, which in turn means that $POST is an empty array. As such, the array index 'submit' does not exist, which gives Notice: Undefined index: submit.

// check if the index exists - no error if it doesn't
if (isset($_POST['submit']))

KeyIDentity

Thank you so much, I am beginning to understand. I do have the first code you posted. Do you mean that, where the first code is written ($_POST['submit']) I should insert the second code you displayed?

sneakyimp

The "notice" you received isn't really a bad error. It's just a note from PHP that you are referring to an array item which is not currently defined. If instead of trying to peek at the value of $_POST['submit'] you first check to see if it's been set (using [man]isset[/man]) then you can avoid the notice.

You can also change the degree to which PHP complains about these problems using [man]error_reporting[/man].

KeyIDentity

sneakyimp;10959605 wrote:
The "notice" you received isn't really a bad error. It's just a note from PHP that you are referring to an array item which is not currently defined. If instead of trying to peek at the value of $_POST['submit'] you first check to see if it's been set (using [man]isset[/man]) then you can avoid the notice.

You can also change the degree to which PHP complains about these problems using [man]error_reporting[/man].

Im really new to this and i am trying to build a database/website basically copying right now to get the feel for how it all connects... New Problem using a new tutorial.

<?php
session_start();

$username = $POST['username'];
$password = $POST['password'];

include ("connect.php");

if ($username && $password)
{

//info is provided
$queryget = mysql_query ("SELECT * FROM users WHERE username='$username' AND password='$password' ");
$numrows = mysql_num_rows($queryget);
if ($numrows !=0)
{
$_SESSION['username'] = $username;

	echo "You have been logged in" <a href='members.php'>Go to the members only page</a>";

}

else
echo "Your username was not found";
{
echo "You did not provide valid info. for login";
include ("index5.php");
}
?>

Getting error:
Parse error: parse error, expecting ','' or';'' in C:\wamp\www\login.php on line 19

Where do you see the problem?

sneakyimp

Please use the formatting tags.

This line has a syntax error:

echo "You have been logged in" <a href='members.php'>Go to the members only page</a>";