How to get the post vars from a form via user function - forms

Question

On a Typo3 website a form is integrated. The action should be routed to a typoscript user function.
This is what I tried so far:
The fluid form code (excerpt):
<form action="{f:cObject(typoscriptObjectPath: 'lib.mynlreg')}" method="post">
<input type="text" name="email" placeholder="Ihre E-Mail-Adresse">
<input type="submit" name="send" value="Jetzt registrieren" class="submit" />
</form>
The typoscript lib:
lib.mynlreg = USER_INT
lib.mynlreg {
userFunc = Vendor\Extension\myClass->myFunction
}
And the class:
class myClass {
public function myFunction($content, $conf) {
$arguments = $this->request->getArguments();
$formEmail = $arguments['email'];
return '<div>' . $formEmail . '</div>';
}
}
I expect to get the content of the form field "email", but after submitting the page throws an error. The question is, how do I get the post vars into the user function? Thank you for any help!

Answer 1

$this->request is not available in a userFunc. As gautamsinh mori says, you should use \TYPO3\CMS\Core\Utility\GeneralUtility::_GP('email');, however I'm not sure you understand what the f:cObject ViewHelper does.
With this code, your HTML before submitting the form will be:
<form action="<div></div>" method="post">
<input type="text" name="email" placeholder="Ihre E-Mail-Adresse">
<input type="submit" name="send" value="Jetzt registrieren" class="submit" />
</form>
Your HTML after submitting will be:
<form action="<div>filledInEmail</div>" method="post">
<input type="text" name="email" placeholder="Ihre E-Mail-Adresse">
<input type="submit" name="send" value="Jetzt registrieren" class="submit" />
</form>
I'd recommend making an extension for this, but if you really want/need to do it like this, I think what you're looking for is something like:
<f:cObject typoscriptObjectPath="lib.mynlreg" />
<form action="{uri.page(addQueryString: 1)}" method="post">
<input type="text" name="email" placeholder="Ihre E-Mail-Adresse">
<input type="submit" name="send" value="Jetzt registrieren" class="submit" />
</form>
This will create the form with action to the current page (including any query string). You then have to change the userFunc to return an empty string if the form hasn't been submitted. Something like:
class myClass {
public function myFunction($content, $conf) {
$formEmail = \TYPO3\CMS\Core\Utility\GeneralUtility::_GP('email');
if (empty($formEmail)) {
return '';
}
return '<div>' . $formEmail . '</div>';
}
}