[BUGFIX] PHP 7 compatibility

Classes/ViewHelpers/ExtendedIfViewHelper.php

@@ -32,6 +32,22 @@ use TYPO3\CMS\Fluid\Core\ViewHelper\AbstractConditionViewHelper;
  * ExtendedIfViewHelper
  */
 class ExtendedIfViewHelper extends AbstractConditionViewHelper {
+	/**
+	 * @return void
+	 */
+	public function initializeArguments() {
+		$this->registerArgument('condition', 'boolean', 'Condition to be evaluated.');
+		$this->registerArgument('or', 'boolean', 'First or condition');
+		$this->registerArgument('or2', 'boolean', 'Second or condition');
+		$this->registerArgument('or3', 'boolean', 'Third or condition');
+		$this->registerArgument('or4', 'boolean', 'Fourth or condition');
+		$this->registerArgument('and', 'boolean', 'First and condition');
+		$this->registerArgument('and2', 'boolean', 'Second and condition');
+		$this->registerArgument('and3', 'boolean', 'Third and condition');
+		$this->registerArgument('and4', 'boolean', 'Fourth and condition');
+		$this->registerArgument('negate', 'boolean', 'Negate complete condition');
+	}
+
 	/**
 	 * renders <f:then> child if $condition or $or is true, otherwise renders <f:else> child.
 	 *