Do I need a php mysql connection in each function that uses database?

Question

I am creating a php restful API and currently I have the database connection information in each function.

//Connect To Database
    $hostname=host;
    $use         


        

Answer 1

To avoid creating a new database connection each time, we can use Singleton design pattern-

we need to have a database class- to handle the DB connection-

Database.class.php

db_host,$this->db_user,$this->db_pass);
                mysql_select_db($this->db_name);
            }

            // Getter method for creating/returning the single instance of this class
            public static function getInstance()
            {
                if (!self::$m_pInstance)
                {
                    self::$m_pInstance = new Database();
                }
                return self::$m_pInstance;
            }

            public function query($query)
            {
               return mysql_query($query);
            }

         }
?>

& we can call it from other files-

other.php

query('...');
?>