core-bundle/src/Resources/contao/dca/tl_content.php
public function getForms()
	{
		if (!$this->User->isAdmin && !\is_array($this->User->forms))
		{
			return array();
		}

		$arrForms = array();
		$objForms = $this->Database->execute("SELECT id, title FROM tl_form ORDER BY title");

		while ($objForms->next())
		{
			if ($this->User->hasAccess($objForms->id, 'forms'))
			{
				$arrForms[$objForms->id] = $objForms->title . ' (ID ' . $objForms->id . ')';
			}
		}

		return $arrForms;
	}
public function getForms()
	{
		if (!$this->User->isAdmin && !\is_array($this->User->forms))
		{
			return array();
		}

		$arrForms = array();
		$objForms = $this->Database->execute("SELECT id, title FROM tl_form ORDER BY title");

		while ($objForms->next())
		{
			if ($this->User->hasAccess($objForms->id, 'forms'))
			{
				$arrForms[$objForms->id] = $objForms->title . ' (ID ' . $objForms->id . ')';
			}
		}

		return $arrForms;
	}
Get all forms and return them as array

@return array