PHP Try catch: Catch exception, throw exception

php Try catch: Catch exception, throw an exception:

/** * Constructor: Automatically load connection database * @param $database $key * @return */Private Function __construct ($database =                        Array (), $key) {try{$this->server = $database [' Db_host '];                        $this->username = $database [' Db_user '];                        $this->password = $database [' db_pwd '];                        $this->database_name = $database [' db_name '];                        $this->database_type = $database [' Db_type '];                        $this->database_port = $database [' Db_port ']; if ($this->database_type = = ' MySQL ') {$this->pdo = new PDO ($this->database_type.             ': host= '. $this->server.             ';p ort= '. $this->database_port.             ';d bname= '. $this->database_name, $this->username, $this->password, array (pdo::attr_timeout = self                        :: Time_out));             }else{           $this->pdo = new PDO ("Dblib:host= $this->server: $this->database_port;                        Dbname= $this->database_name "," $this->username "," $this->password "); } $this->pdo->exec (' SET NAMES \ '. $this->charset.                        '\'');                                   Self:: $pdo _ref[$key] = & $this->pdo;                    }catch (pdoexception $e) {echo $e->getmessage (); }                }

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