How to fix Undefined variable error

 

<form name="myform" id="myform" method="post" action="add_comment.php">

<h2>Please leave a comment:</h2>

<input type="text" id="username" name="username" value="Enter Username" /><br />

<input type="text" id="email" name="email" value="Enter Email" /><br />

<textarea id="comment" name="comment">Enter Comment</textarea><br />

<br /><br />

<input type="checkbox" id="notify_box" name="notify_box" value="Y">

Notify me when a new post is published. <br />

<br />

<input type="submit" value="Post Comment">

</form>

<?php

<?php

$notify = "";

$uName = $_POST['username'];

$eMail = $_POST['email'];

$comment= $_POST['comment'];

if(isset($_POST['notify_box'])){ $notify = $_POST['notify_box']; }

// send the data to the database

?>

When executing the program....

“Warning: Undefined index:”

We can fix this using the isset() function too. But on this instance, we can just ignore it by hiding the notices like this.

<?php error_reporting(E_ALL ^ E_NOTICE);?>

The code should be like this==>>>

<?php

if(isset($_POST)){

$notify = "";

$uName = $_POST['username'];

$eMail = $_POST['email'];

$comment= $_POST['comment'];

if(isset($_POST['notify_box'])){ $notify = $_POST['notify_box']; }

// send the data to the database

}

?>