I tried to backup my database following the instruction from SQL Server: Database stuck in "Restoring" state. but i have my database stuck in \"Restoring\" state. php
It seems have problem with PDO driver, this problem may be in the ODBC/SNAC layer on which the driver is built. But this database restoring works well with other drivers.
I tried with sqlsrv and mssql, they worked well.
For more detail, see Restoring a SQL Server Database from PHP