/**
* 构造函数
* @param string $host 数据库主机
* @param string $user 用户名
* @param string $pw 密码
* @param string $name 数据库名
* @param bool $long 是否开启长连接
*/
public function __construct($host, $user, $pw, $name, $long = false)
{
try {
parent::__construct($host, $user, $pw, $name, $long);
} catch (Exception $ex) {
msg($ex->getMessage());
}
}
/**
* 构造函数
* @param string $host 数据库主机
* @param string $user 用户名
* @param string $pw 密码
* @param string $name 数据库名
* @param bool $long 是否开启长连接
*/
public function __construct($host, $user, $pw, $name, $long = false)
{
if (!class_exists('mysqli')) {
throw new Exception('服务器不支持MySqli类');
}
$coninfo = strpos($host, ':');
if ($coninfo === false) {
if ($long) {
$host = 'p:' . $host;
}
@($this->conn = new mysqli($host, $user, $pw, $name));
} else {
if ($long) {
@($this->conn = new mysqli('p:' . substr($host, 0, $coninfo), $user, $pw, $name, substr($host, $coninfo + 1)));
} else {
@($this->conn = new mysqli(substr($host, 0, $coninfo), $user, $pw, $name, substr($host, $coninfo + 1)));
}
}
if ($this->conn->connect_error) {
switch ($this->conn->connect_errno) {
case 1044:
case 1045:
throw new Exception("连接数据库失败，数据库用户名或密码错误", 10000);
break;
case 1049:
throw new Exception("连接数据库失败，未找到您填写的数据库", 10000);
break;
case 2003:
throw new Exception("连接数据库失败，数据库端口错误", 10000);
break;
case 2005:
throw new Exception("连接数据库失败，数据库地址错误或者数据库服务器不可用", 10000);
break;
case 2006:
throw new Exception("连接数据库失败，数据库服务器不可用", 10000);
break;
default:
throw new Exception("连接数据库失败，请检查数据库信息。错误编号：" . $this->conn->connect_errno, 10000);
break;
}
}
$this->conn->set_charset('utf8');
self::$instance = $this->conn;
return self::$instance;
}
/**
* 构造函数
* @param string $host 数据库主机
* @param string $user 用户名
* @param string $pw 密码
* @param string $name 数据库名
* @param bool $long 是否开启长连接
*/
public function __construct($host, $user, $pw, $name, $long = false)
{
if (!function_exists('mysql_connect')) {
throw new Exception('服务器PHP不支持MySql数据库');
}
if ($long) {
$this->conn = @mysql_pconnect($host, $user, $pw);
} else {
$this->conn = @mysql_connect($host, $user, $pw);
}
if (!$this->conn) {
switch ($this->geterrno()) {
case 2005:
throw new Exception("连接数据库失败，数据库地址错误或者数据库服务器不可用", 10000);
break;
case 2003:
throw new Exception("连接数据库失败，数据库端口错误", 10000);
break;
case 2006:
throw new Exception("连接数据库失败，数据库服务器不可用", 10000);
break;
case 1045:
throw new Exception("连接数据库失败，数据库用户名或密码错误", 10000);
break;
default:
throw new Exception("连接数据库失败，请检查数据库信息。错误编号：" . $this->geterrno(), 10000);
break;
}
}
if ($this->getMysqlVersion() > '4.1') {
mysql_query("SET NAMES 'utf8'");
}
if (!mysql_select_db($name, $this->conn)) {
throw new Exception("连接数据库失败，未找到您填写的数据库", 10000);
}
self::$instance = $this->conn;
return self::$instance;
}