[TYPO3-english] TYPO3 8.7 and Flexform

[jeppe at donslund.net]

Hi

I can seem to find a working tutorial on how to use Flexform in TYPO3 
8.7.

I have tried with this:
$extensionName = 
\TYPO3\CMS\Core\Utility\GeneralUtility::underscoredToUpperCamelCase($_EXTKEY);
$frontendpluginName = 'BEF Members';
$pluginSignature = 
strtolower($extensionName).'_'.strtolower($frontendpluginName);
$TCA['tt_content']['types']['list']['subtypes_addlist'][$pluginSignature] 
= 'pi_flexform';
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addPiFlexFormValue($pluginSignature, 
'FILE:EXT:'.$_EXTKEY.'/Configuration/flexform.xml');

But the flexfrom doesn't show up.


Can anyone help me?


Regards
Jeppe Donslund