**查询** * pdo\_get * pdo\_getcolumn * pdo\_getall * pdo\_getslice * pdo\_fetch * pdo\_fetchcolumn * pdo\_fetchall **变更** * pdo\_insert * pdo\_update * pdo\_delete **运行SQL** * pdo\_query * pdo\_run **辅助函数** * pdo\_fieldexists * pdo\_indexexists * pdo\_tableexists * pdo\_fieldmatch * pdo\_debug