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<?php
/**
*本来是为了调试SAE<http://sinaapp.com>程序用的。当时SAE没有本地SDK，所以就找到了saemysql.class.php，果然好用，于是稍微改造了一下。用了半年多了。强烈推荐。
* SBM Mysql服务
*
* 支持主从分离
*
* @author logan liu <[email protected]>
* @version $Id$
* @package
*
*/
/**
* Sbm Mysql Class
*
* <code>
* <?php
* $mysql = new SbmMysql();
*
* $sql = "SELECT * FROM `user` LIMIT 10";
* $data = $mysql->getData( $sql );
* $name = strip_tags( $_REQUEST['name'] );
* $age = intval( $_REQUEST['age'] );
* $sql = "INSERT INTO `user` ( `name` , `age` , `regtime` ) VALUES ( '" . $mysql->escape( $name ) . "' , '" . intval( $age ) . "' , NOW() ) ";
* $mysql->runSql( $sql );
* if( $mysql->errno() != 0 )
* {
* die( "Error:" . $mysql->errmsg() );
* }
*
* $mysql->closeDb();
* ?>
* </code>
*
* @package
* @author logan liu
*
*/
class SbmMysql
{
/**
* 构造函数
*
* @param bool $do_replication 是否支持主从分离，true:支持，false:不支持，默认为true
* @return void
* @author logan liu
*/
function __construct( $do_replication = true )
{
if($_SERVER["REMOTE_ADDR"]=="127.0.0.1"){
$this->port = 3306;
$this->host = '172.16.2.223';
$this->accesskey = "root";
$this->secretkey = "shibang416";
$this->appname = 'app_0xff';
}else if(empty($_SERVER['HTTP_APPNAME'])){
$this->port = 3306;
$this->host = 'localhost';
$this->accesskey = "root";
$this->secretkey = "shibang416";
$this->appname = 'app_0xff';
}else{
$this->port = 3307;
$this->host = '.rdc.sae.sina.com.cn';
$this->accesskey = SAE_ACCESSKEY;
$this->secretkey = SAE_SECRETKEY;
$this->appname = 'app_' . $_SERVER['HTTP_APPNAME'];
}
//set default charset as utf8
$this->charset = 'UTF8';
$this->do_replication = $do_replication;
}
/**
* 设置keys
*
* 当需要连接其他APP的数据库时使用
*
* @param string $akey AccessKey
* @param string $skey SecretKey
* @return void
* @author logan liu
*/
public function setAuth( $akey , $skey )
{
$this->accesskey = $akey;
$this->secretkey = $skey;
}
/**
* 设置Mysql服务器端口
*
* 当需要连接其他APP的数据库时使用
*
* @param string $port
* @return void
* @author logan liu
*/
public function setPort( $port )
{
$this->port = 3307;
$this->host = '.rdc.sae.sina.com.cn';
}
/**
* 设置Appname
*
* 当需要连接其他APP的数据库时使用
*
* @param string $appname
* @return void
* @author logan liu
*/
public function setAppname( $appname )
{
$this->appname = 'app_' . $appname;
}
/**
* 设置当前连接的字符集 , 必须在发起连接之前进行设置
*
* @param string $charset 字符集,如GBK,GB2312,UTF8
* @return void
*/
public function setCharset( $charset )
{
return $this->set_charset( $charset );
}
/**
* 同setCharset,向前兼容
*
* @param string $charset
* @return void
* @ignore
*/
public function set_charset( $charset )
{
$this->charset = $charset;
}
/**
* 运行Sql语句,不返回结果集
*
* @param string $sql
* @return mysqli_result|bool
*/
public function runSql( $sql )
{
return $this->run_sql( $sql );
}
/**
* 同runSql,向前兼容
*
* @param string $sql
* @return bool
* @author logan liu
* @ignore
*/
public function run_sql( $sql )
{
$this->last_sql = $sql;
$dblink = $this->db_write();
if ($dblink === false) {
return false;
}
$ret = mysqli_query( $dblink, $sql );
$this->save_error( $dblink );
return $ret;
}
/**
* 运行Sql,以多维数组方式返回结果集
*
* @param string $sql
* @return array 成功返回数组，失败时返回false
* @author logan liu
*/
public function getData( $sql )
{
return $this->get_data( $sql );
}
/**
* 同getData,向前兼容
*
* @ignore
*/
public function get_data( $sql )
{
$this->last_sql = $sql;
$data = Array();
$i = 0;
$dblink = $this->do_replication ? $this->db_read() : $this->db_write();
if ($dblink === false) {
return false;
}
$result = mysqli_query( $dblink , $sql );
$this->save_error( $dblink );
if (is_bool($result)) {
return $result;
} else {
while( $Array = mysqli_fetch_array( $result, MYSQL_ASSOC ) )
{
$data[$i++] = $Array;
}
}
mysqli_free_result($result);
if( count( $data ) > 0 )
return $data;
else
return array();
}
/**
* 运行Sql,以数组方式返回结果集第一条记录
*
* @param string $sql
* @return array 成功返回数组，失败时返回false
* @author logan liu
*/
public function getLine( $sql )
{
return $this->get_line( $sql );
}
/**
* 同getLine,向前兼容
*
* @param string $sql
* @return array
* @author logan liu
* @ignore
*/
public function get_line( $sql )
{
$data = $this->get_data( $sql );
if ($data) {
return @reset($data);
} else {
return false;
}
}
/**
* 运行Sql,返回结果集第一条记录的第一个字段值
*
* @param string $sql
* @return mixxed 成功时返回一个值，失败时返回false
* @author logan liu
*/
public function getVar( $sql )
{
return $this->get_var( $sql );
}
/**
* 同getVar,向前兼容
*
* @param string $sql
* @return array
* @author logan liu
* @ignore
*/
public function get_var( $sql )
{
$data = $this->get_line( $sql );
if ($data) {
return $data[ @reset(@array_keys( $data )) ];
} else {
return false;
}
}
/**
* 同mysqli_affected_rows函数
*
* @return int 成功返回行数,失败时返回-1
* @author Elmer Zhang
*/
public function affectedRows()
{
$result = mysqli_affected_rows( $this->db_write() );
return $result;
}
/**
* 同mysqli_last_id函数
*
* @return int 成功返回last_id,失败时返回false
* @author logan liu
*/
public function lastId()
{
return $this->last_id();
}
/**
* 同lastId,向前兼容
*
* @return int
* @author logan liu
* @ignore
*/
public function last_id()
{
$result = mysqli_insert_id( $this->db_write() );
return $result;
}
/**
* 关闭数据库连接
*
* @return bool
* @author logan liu
*/
public function closeDb()
{
return $this->close_db();
}
/**
* 同closeDb,向前兼容
*
* @return bool
* @author logan liu
* @ignore
*/
public function close_db()
{
if( isset( $this->db_read ) )
@mysqli_close( $this->db_read );
if( isset( $this->db_write ) )
@mysqli_close( $this->db_write );
}
/**
* 同mysqli_real_escape_string
*
* @param string $str
* @return string
* @author logan liu
*/
public function escape( $str )
{
if( isset($this->db_read) ) {
$db = $this->db_read;
} elseif( isset($this->db_write) ) {
$db = $this->db_write;
} else {
$db = $this->db_read();
}
return mysqli_real_escape_string( $db , $str );
}
/**
* 返回错误码
*
*
* @return int
* @author logan liu
*/
public function errno()
{
return $this->errno;
}
/**
* 返回错误信息
*
* @return string
* @author logan liu
*/
public function error()
{
return $this->error;
}
/**
* 返回错误信息,error的别名
*
* @return string
* @author logan liu
*/
public function errmsg()
{
return $this->error();
}
/**
* @ignore
*/
private function connect( $is_master = true )
{
if ($this->port == 0) {
$this->error = 13048;
$this->errno = 'Not Initialized';
return false;
}
if(empty($_SERVER['HTTP_APPNAME'])){
$host=$this->host;
}else{
if( $is_master ) $host = 'w' . $this->host;
else $host = 'r' . $this->host;
}
$db = mysqli_init();
mysqli_options($db, MYSQLI_OPT_CONNECT_TIMEOUT, 5);
if( !mysqli_real_connect( $db, $host , $this->accesskey , $this->secretkey , $this->appname , $this->port ) )
{
$this->error = mysqli_connect_error();
$this->errno = mysqli_connect_errno();
return false;
}
mysqli_set_charset( $db, $this->charset);
return $db;
}
/**
* @ignore
*/
private function db_read()
{
if( isset( $this->db_read ) )
{
return $this->db_read;
}
else
{
if( !$this->do_replication ) return $this->db_write();
else
{
$this->db_read = $this->connect( false );
return $this->db_read;
}
}
}
/**
* @ignore
*/
private function db_write()
{
if( isset( $this->db_write ) )
{
return $this->db_write;
}
else
{
$this->db_write = $this->connect( true );
return $this->db_write;
}
}
/**
* @ignore
*/
private function save_error($dblink)
{
$this->error = mysqli_error($dblink);
$this->errno = mysqli_errno($dblink);
}
private $error;
private $errno;
private $last_sql;
}