class Db {
protected function initConnect($master=true) {
if(1 == C('DB_DEPLOY_TYPE'))
// 采用分布式数据库
$this->_linkID = $this->multiConnect($master);
else
// 默认单数据库
if ( !$this->connected ) $this->_linkID = $this->connect();
}
}
class DbMysql extends Db{
public function connect($config='',$linkNum=0,$force=false) {
if ( !isset($this->linkID[$linkNum]) ) {
if(empty($config)) $config = $this->config;
// 处理不带端口号的socket连接情况
$host = $config['hostname'].($config['hostport']?":{$config['hostport']}":'');
// 是否长连接
$pconnect = !empty($config['params']['persist'])? $config['params']['persist']:$this->pconnect;
if($pconnect) {
$this->linkID[$linkNum] = mysql_pconnect( $host, $config['username'], $config['password'],131072);
}else{
$this->linkID[$linkNum] = mysql_connect( $host, $config['username'], $config['password'],true,131072);
}
if ( !$this->linkID[$linkNum] || (!empty($config['database']) && !mysql_select_db($config['database'], $this->linkID[$linkNum])) ) {
throw_exception(mysql_error());
}
$dbVersion = mysql_get_server_info($this->linkID[$linkNum]);
//使用UTF8存取数据库
mysql_query("SET NAMES '".C('DB_CHARSET')."'", $this->linkID[$linkNum]);
//设置 sql_model
if($dbVersion >'5.0.1'){
mysql_query("SET sql_mode=''",$this->linkID[$linkNum]);
}
// 标记连接成功
$this->connected = true;
// 注销数据库连接配置信息
if(1 != C('DB_DEPLOY_TYPE')) unset($this->config);
}
return $this->linkID[$linkNum];
}
}Db是父类，调用了DbMysql子类的connect函数。这样对吗？ 最佳答案
