Solution Guide for Migrating Oracle on UNIX to SQL Server - Willy .Net

244 Developing: Applications — <strong>Migrating</strong> PHPOperation Task ORA function MSSQL functionora_commit()Rollbackora_rollback() -Error Handling Error checking ora_error()-ora_errorcode()OthersName of result ora_columnname() mssql_field_name()columnSize of result ora_columnsize() mssql_field_length()columnDatatype of result ora_columntype() mssql_field_type()columnNumber of rowseffectedora_numrows() mssqp_num_rows()Number of columns ora_numcols() mssql_num_fields()returnedCase 2: Interoperating a PHP Application Using OCI8Functions To interoperate using OCI8, follow these common steps:As with Case 1 "Interoperating a PHP Application Using ORA Functions", the best alternative<strong>for</strong> OCI8 functions is to replace them with MSSQL calls. Most of the steps are the samebetween this procedure and the p rocedure in the "Case 1: Interoperating a PHP ApplicationUsing ORA F unctions" section of this scenario. As a result, these steps are not described indetail here.1. Install the FreeTDS SQL Server libraries.2. Compile PHP to use MSSQLAPIs.3. Enable MSSQL functions within php.ini.4. Verify the installation using phpinfo().5 . Change all embedded SQL statements to T-SQL.Refer to Chapter 11, "Developin g: Applications — <strong>Oracle</strong> SQL and PL/SQL," <strong>for</strong> adetailed discussion on modifying <strong>Oracle</strong> SQL to be SQL Server-compliant.6. Modify application code to reflect the new drivers.The following sample source code is used to illustrate the changes required in PHPcode when replacing OCI8 functions with MSSQL functions.The following example is the original OCI8-based PHP code: