PDO singleton model

巴扎黑
Release: 2016-11-24 14:19:54
Original
1308 people have browsed it

<?php
/**
 * ipdo.php
 *
 * discription
 *
 * @filename ipdo.php
 * @version  v1.0
 * @update   2011-4-27
 * @author   randy.hong
 * @contact homingway@163.com
 * @package  pdo
 */
//DB config
define(&#39;DB_HOST&#39;,   &#39;localhost&#39;);
define(&#39;DB_PORT&#39;,   &#39;3306&#39;);
define(&#39;DB_USER&#39;,   &#39;root&#39;);
define(&#39;DB_PASSWD&#39;, &#39;123456&#39;);
define(&#39;DB_CHARSET&#39;,&#39;utf8&#39;);
class IPDO {
    /**
     * The singleton instance
     */
    static public $PDOInstance;
  /**
   * Creates a PDO instance representing a connection to a database and makes the instance available as a singleton
   * @return PDO
   */
    public function __construct(){
    $dsn = &#39;mysql:host=&#39;.DB_HOST.&#39;;port=&#39;.DB_PORT.&#39;;dbname=&#39;.DB_NAME;
    $driver_options = array(PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES ".DB_CHARSET);
        if(!self::$PDOInstance) {
       try {
               self::$PDOInstance = new PDO($dsn, DB_USER, DB_PASSWD, $driver_options);
               self::$PDOInstance->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
            } catch (PDOException $e) {
                die($e->getMessage());
            }
    }
      return self::$PDOInstance;
    }
}
//使用
$pdo = new IPDO();
?>
Copy after login


Related labels:
php
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template