Expected Input Field Not Submitted in PHP

Q

What Happens If an Expected Input Field Was Not Submitted in PHP?

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A

Obviously, if an expected input field was not submitted, there will be no entry in the $_REQUEST array for that field. You may get an execution error, if you are not checking the existence of the expected entries in $_REQUEST. For example, if you copy processing_forms.php to your local Web server, and run your browser with http://localhost/processing_forms.php?name=Joe, you will an error page like this:

You have submitted the following information:
  Name = Joe
  Comments = 
Thank you!

PHP Notice: Undefined index: 
  comment in ...\processing_forms.php on line 3 

 

Processing Web Forms in PHP

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2016-11-15, 283👍, 0💬