WP / test / mysqli / db.inc.php

<?php

class DBConn implements IDBConn {
   private $_db=0;

   private $DB_HOST;
   private $DB_USER;
   private $DB_PASSWORD;
   private $DB_NAME;

   //----------------------------------
   public function connect() {

      $this->_db = @new mysqli ($this->DB_HOST, $this->DB_USER, $this->DB_PASSWORD, $this->DB_NAME );

      if ($this->_db->connect_errno) {

         throw new Exception('connection error '.$this->_db->connect_error);
      }

   }

   //----------------------------------
   public function set($DB_HOST, $DB_USER, $DB_PASSWORD, $DB_NAME) {

      $this->DB_HOST = $DB_HOST;
      $this->DB_USER = $DB_USER;
      $this->DB_PASSWORD = $DB_PASSWORD;
      $this->DB_NAME = $DB_NAME;
   }

   //----------------------------------
   public function get() {
      if ($this->_db===0) {
         $this->connect();
      }

      return $this->_db;
   }
}

?>