src/Session.php
public function delete($identifier = null) {
		if ($this->get($identifier) === null) return;
		$this->arrayDelete(self::$_data, '_session_class._standard.' . $this->section . ($identifier !== null ? '.' . $identifier : ''));
	}
public function delete($identifier = null) {
		if ($this->get($identifier) === null) return;
		$this->arrayDelete(self::$_data, '_session_class._standard.' . $this->section . ($identifier !== null ? '.' . $identifier : ''));
	}
public function delete ( $ identifier = null ) { if ( $ this -> get ( $ identifier ) === null ) return ; $ this -> arrayDelete ( self :: $ _data , '_session_class._standard.' . $ this -> section . ( $ identifier !== null ? '.' . $ identifier : '' ) ) ; }
Deletes session data.

@param string $identifier	The identifier you want to delete.
@return null
Deletes session data .