“Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP

Question

I\'m running a PHP script and continue to receive errors like:

Notice: Undefined variable: my_variable_name in C:\\wamp\\www\\mypath\\index.php on line 10

Answer 1

One common cause of a variable not existing after an HTML form has been submitted is the form element is not contained within a

tag:

Example: Element not contained within the

    

        
        
    



    choice 1
    choice 2
    choice 3
    choice 4

Example: Element now contained within the

    
        choice 1
        choice 2
        choice 3
        choice 4