@param string $key

@return mixed|null
512617
private function getChild($key)
    {
        $top = $this->params;

        foreach (explode($this->delimiter, $key) as $node) {
            if (!isset($top[$node])) {
                return null;
            }
            $top = $top[$node];
        }
        return $top;
    }
1198495
public function get_property( $key ) {
		return isset( $this->properties[ $key ] ) ? $this->properties[ $key ] : null;
	}
1285738
public function find($key)
    {
        if (isset($this->payload[$key])) {
            return $this->payload[$key];
        }

        return null;
    }
882362
public static function get(string $key)
    {
        return isset(Notification::$notifications[$key]) ? Notification::$notifications[$key] : null;
    }
183220
public function getParam(String $key) {

		return $this->params[$key] ?? $this->httpErrors[$key] ?? null;

	}
1050692
public function getValue($key) {
		if (isset ( $this->a [$key] )) {
			return $this->a [$key];
		} else {
			return NULL;
		}
	}
593535
protected function get($key)
    {
        $this->checkForNonEmptyKey($key);
        if (!isset($this->getBackEndUser()->uc[self::PHPUNIT_SETTINGS_KEY][$key])) {
            return null;
        }

        return $this->getBackEndUser()->uc[self::PHPUNIT_SETTINGS_KEY][$key];
    }
713835
public function getValue($key)
    {
        if (!isset($this->values[$key])) {
            return null;
        }
        return $this->values[$key];
    }
126849
protected function getUrlForKey($key)
    {
        return isset($this->urls[$key]) ? $this->urls[$key] : null;
    }
1077124
public function get(string $key)
    {
        $slug = $this->splitKey($key);

        if (is_string($slug)) {
            if (isset($this[$slug])) {
                return $this[$slug];
            }
            return null;
        }

        $array = $this->toArray();

        foreach ($slug as $search) {
            if (isset($array[$search])) {
                $array = $array[$search];
            } else {
                return;
            }
        }

        return $array;
    }
104701
public function getKey($key)
    {
        $key = strtolower($key);
        if (!isset($this->keys[$key])) {
            return null;
        }
        return (string)$this->keys[$key];
    }
221173
public function get($key)
    {
        if (!$this->isEnabled()) {
            return null;
        }

        if (xcache_isset($this->prefix() . $key)) {
            return unserialize(xcache_get($this->prefix() . $key));
        } else {
            return null;
        }
    }
1294236
public static function getValue(string $key)
    {
        $key = \mb_strtolower($key);
        if(isset(self::$_data[$key])) {
            return self::$_data[$key];
        }
        return null;
    }
762040
public function get(string $key)
    {
        return isset($this->loggers[$key]) ? $this->loggers[$key] : null;
    }
745276
public static function get(string $key)
    {
        if (isset($_COOKIE[$key]) === false) {
            return null;
        }

        $serializedValue = $_COOKIE[$key];
        $value = unserialize($serializedValue);

        return $value;
    }
422863
public function get($key)
    {
        if (empty($this->data[$key]) === true) {
            return null;
        }

        return $this->data[$key];
    }
29661
public function GetCache($key)
    {
		return (array_key_exists($key, $this->_cache) ? $this->_cache[$key] : null);
	}