nanguaboss
44 lines
1.0 KiB
PHP
44 lines
1.0 KiB
PHP
<?php
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/**
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* PDO 数据库连接类（单例模式）
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* 用法：$pdo = DB::getInstance()->getPdo();
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*/
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class DB
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{
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private static $instance = null;
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private $pdo;
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private function __construct()
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{
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$cfg = require __DIR__ . '/../../config/database.php';
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$dsn = sprintf(
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'mysql:host=%s;port=%d;dbname=%s;charset=%s',
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$cfg['host'],
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$cfg['port'],
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$cfg['dbname'],
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$cfg['charset']
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);
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$this->pdo = new PDO($dsn, $cfg['username'], $cfg['password'], [
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PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
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PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
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PDO::ATTR_EMULATE_PREPARES => false,
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]);
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}
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public static function getInstance()
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{
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if (self::$instance === null) {
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self::$instance = new self();
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}
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return self::$instance;
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}
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public function getPdo()
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{
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return $this->pdo;
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}
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// 禁止克隆
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private function __clone() {}
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}
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