PHP连接MYSQL数据库

PHP连接MYSQL数据库

（1）连接类Db类

<?php

class Db {
static private $_instance;
static private $_connectSource;
private $_dbConfig = array(
'host' => '127.0.0.1',//数据库服务器地址
'user' => 'root',//数据库用户名
'password' => '',//数据库密码
'database' => 'phpdb',// 数据库名
);

private function __construct() {
}

static public function getInstance() {
if(!(self::$_instance instanceof self)) {
self::$_instance = new self();
}
return self::$_instance;
}

public function connect() {
if(!self::$_connectSource) {
self::$_connectSource = @mysql_connect($this->_dbConfig['host'], $this->_dbConfig['user'], $this->_dbConfig['password']);

if(!self::$_connectSource) {
throw new Exception('mysql connect error ' . mysql_error());
//die('mysql connect error' . mysql_error());
}

mysql_select_db($this->_dbConfig['database'], self::$_connectSource);
mysql_query("set names UTF8", self::$_connectSource);
}
return self::$_connectSource;
}
}

（2）使用例子

$sql = "select * from  news ";
try {
    
    $connect = Db::getInstance()->connect();
    
} catch (Exception $e) {
    // $e->getMessage();
    //return Response::show(403, '数据库链接失败');
}
$result = mysql_query($sql, $connect);