Undefined Index when using post

Question

I'm getting undefined index errors on the $_POST variables. I.E. $_POST['hostname']. I know kinda why I'm getting them, but is there a way to keep the php and form in the same file and not get these errors?

<html>
<head>
    <title>Install Forum</title>
</head>
<body>
<h1>Please enter your database information</h1>

<form action='install.php' method='post'>
Hostname: <input type='text' name='hostname'><br/>
MySQL User: <input type='text' name='dbuser'><br/>
MySQL Pass: <input type='password' name='dbpassword'><br/>
<input type='submit' name='submit' value='Submit'><br/>
</body>
</html>
<?php
include_once("config.php");
$date = date('Y-m-d');

//Database Variables
$dbhost = strip_tags($_POST['hostname']);
$dbuser = strip_tags($_POST['dbuser']);
$dbpass = strip_tags($_POST['dbpassword']);
$submit = isset($_POST['submit']);

possible duplicate of PHP: "Notice: Undefined variable" and "Notice: Undefined index" — Jocelyn
– Jocelyn, Commented Mar 29, 2013 at 11:55

user142162 · Accepted Answer · 2011-11-24 17:09:50Z

4

Wrap your PHP code in an if with an isset condition. This way, the code will only be run if the form has been submitted:

if(isset($_POST['submit']))
{
    include_once("config.php");
    $date = date('Y-m-d');

    //Database Variables
    $dbhost = strip_tags($_POST['hostname']);
    $dbuser = strip_tags($_POST['dbuser']);
    $dbpass = strip_tags($_POST['dbpassword']);
    $submit = isset($_POST['submit']);
}

answered Nov 24, 2011 at 17:09

user142162

Sign up to request clarification or add additional context in comments.

2 Comments

Darren Over a year ago

ahh I see, thanks. I was trying to put an isset on each individual variable. Like isset(strip_tags($_POST['hostname']));

Nathan Over a year ago

Try $dbhost = isset($_POST['hostname']) ? strip_tags($_POST['hostname']) : FALSE; or if (isset($_POST['hostname'])) {$dbhost = strip_tags($_POST['hostname']); }

Collectives™ on Stack Overflow

Undefined Index when using post

1 Answer 1

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related