TYPO3 Core

			$isExecuted = array();

			// additional switch to make sure 'required', 'if' and 'fieldRequired'

			// will still stop rendering immediately in case they return false

			// execute each funtion in the predefined order

			foreach ($sortedConf as $stdWrapName => $enabled) {

				// eliminate the second key of a pair 'key'|'key.' to make sure functions get called only once and check if rendering has been stopped

					$functionName = rtrim($stdWrapName, '.');

					$functionProperties = $functionName . '.';

					// if there is any code one the next level, check if it contains "official" stdWrap functions

						);

					}

				}

			}

		}

		return $content;

	public function stdWrap_required($content = '', $conf = array()) {

		if ((string) $content == '') {

			$content = '';

		}

		return $content;

	}

	public function stdWrap_if($content = '', $conf = array()) {

		if (!$this->checkIf($conf['if.'])) {

			$content = '';

		}

		return $content;

	}

	public function stdWrap_fieldRequired($content = '', $conf = array()) {

		if (!trim($this->data[$conf['fieldRequired']])) {

			$content = '';

		}

		return $content;

	}