Why am I getting a 'Fatal error: Call to undefined function sqlsrv_connect()' when connecting to Microsoft Azure SQL Server with XAMPP and PHP 5.6.8?

Fatal Error: Undefined Function 'sqlsrv_connect()'

When trying to connect to a Microsoft Azure SQL server using XAMPP with PHP 5.6.8, an error message of "Fatal error: Call to undefined function sqlsrv_connect()" may occur. This error indicates that the PHP extension for SQL Server (SQLSRV) is not installed or not properly configured.

Solution:

To resolve this error, install the SQLSRV extension for PHP. Here are the steps:

1. Download the SQLSRV Extension:

   • Visit Microsoft's download page for the SQLSRV extension: http://www.microsoft.com/en-us/download/details.aspx?id=20098

2. Choose Your Platform:

   • Select the version of Windows and PHP that you are using.

3. Install the Extension:

   • Run the downloaded executable file (SQLSRV32.EXE) and follow the installation instructions.

4. Enable the Extension in PHP.ini:

   • Open the php.ini file located in the XAMPP installation directory (e.g., C:xamppphpphp.ini).

5. Uncomment or Add the Extension Line:

   • Locate or add the following line in the php.ini file:

     extension=php_sqlsrv_56_ts.dll

6. Save and Restart Apache:

   • Save the changes to php.ini and restart the Apache server from the XAMPP control panel.

Additional Notes:

• Make sure you select the correct version of the SQLSRV extension compatible with your PHP version (56_ts for PHP 5.6.8).
• The SQLSRV extension is no longer bundled with PHP by default, so it must be installed separately.
• If you encounter any issues during installation or configuration, refer to the Microsoft documentation or consult with a PHP developer.

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