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

this error occurred sometime method attribute ( valid passing method ) Error option : method="get" but called by $Fname = $_POST["name"]; or

       method="post" but  called by  $Fname = $_GET["name"];

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