我喜欢为我的表添加前缀,以防我需要将应用程序安装到只有一个数据库的主机上。我想知道是否有一种使用PDO类处理表前缀的简单方法?
目前,我不得不覆盖自己数据库中的每个方法,用前缀替换%p,然后调用super方法。它有效,但它不漂亮!
答案 0 :(得分:9)
扩展PDO类可能是最好的选择。
class MyPDO extends PDO
{
protected $_table_prefix;
protected $_table_suffix;
public function __construct($dsn, $user = null, $password = null, $driver_options = array(), $prefix = null, $suffix = null)
{
$this->_table_prefix = $prefix;
$this->_table_suffix = $suffix;
parent::__construct($dsn, $user, $password, $driver_options);
}
public function exec($statement)
{
$statement = $this->_tablePrefixSuffix($statement);
return parent::exec($statement);
}
public function prepare($statement, $driver_options = array())
{
$statement = $this->_tablePrefixSuffix($statement);
return parent::prepare($statement, $driver_options);
}
public function query($statement)
{
$statement = $this->_tablePrefixSuffix($statement);
$args = func_get_args();
if (count($args) > 1) {
return call_user_func_array(array($this, 'parent::query'), $args);
} else {
return parent::query($statement);
}
}
protected function _tablePrefixSuffix($statement)
{
return sprintf($statement, $this->_table_prefix, $this->_table_suffix);
}
}