(PHP 4 <= 4.1.0, PECL dbplus >= 0.9)
dbplus_chdir — Get/Set database virtual current directory
$newdir
] ) : stringChanges the virtual current directory where relation files will be looked for by dbplus_open().
newdirThe new directory for relation files. You can omit this parameter to query the current working directory.
Returns the absolute path of the current directory.
此函数是实验性的。此函数的表象，包括名称及其相关文档都可能在未来的 PHP 发布版本中未通知就被修改。使用本函数风险自担 。