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@NogDogJul 20.2010 — #Yes, that is probably the most common pattern. As an added feature, if the form is successfully processed, it is common to use a "Location" header() to do a header redirect to a "success" landing page, in order to prevent the browser's refresh button from resubmitting the form data.
In order to prevent PHP notice-level warning for invalid array indexes, plus also allowing you to have the HTML in a separate file/function, you can use the following pattern to display a value:
PS: You could, of course, build a little function that accepts the form name and does the isset() check and applies htmlentities(), so that you don't have to type all that out for each field.
PHP Form Validation / Return for Correction
I need to create a form validation system where the user will be returned to the form with the valid data still in the form and the bad data marked for correction.
Can anyone point me to a good tutorial and/or examples for that sort of thing?
(I should add that I’m surprised at how little useful return I get on Google searches – Lots of javascript stuff but little or nothing that tells me how to return the form with the correct data still filled in. Perhaps I’m just using the wrong keywords, this seems like a pretty common requirement.)
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@NogDogJul 20.2010 — #Yes, that is probably the most common pattern. As an added feature, if the form is successfully processed, it is common to use a "Location" header() to do a header redirect to a "success" landing page, in order to prevent the browser's refresh button from resubmitting the form data.In order to prevent PHP notice-level warning for invalid array indexes, plus also allowing you to have the HTML in a separate file/function, you can use the following pattern to display a value:
[code=php]
<input type='text' name='sample' value='<?php
echo (isset($_POST['sample'])) ? htmlentities($_POST['sample'], ENT_QUOTES, 'UTF-8'), '';?>' />
[/code]PS: You could, of course, build a little function that accepts the form name and does the isset() check and applies htmlentities(), so that you don't have to type all that out for each field.