Undefined index error PHP

Question

I\'m new in PHP and I\'m getting this error:

Notice: Undefined index: productid in /var/www/test/modifyform.php on line 32

Notice: Undef

Answer 1

There should be the problem, when you generate the

. I bet the variables $name, $price are NULL or empty string when you echo them into the value of the field. Empty input fields are not sent by the browser, so $_POST will not have their keys.

Anyway, you can check that with isset().

Test variables with the following:

if(isset($_POST['key'])) ? $variable=$_POST['key'] : $variable=NULL

You better set it to NULL, because

NULL value represents a variable with no value.