SQL Server与PHP连接

Question

I have a php script that connects to SQL Server, locally it works fine because I was able to edit the php.ini to include the extension for php_mssql.dll. With the production server, it would be nice if I didn't have to restart the server, so is there a way to add the php_mssql.dll at the start of the script? If not, how can I check on the server (linux) to see if the php_mssql.dll file is available if I were to add it into the dynamic extensions section of the php.ini?

Answer 1

You can use the dl() function to load the plugin dynamically at runtime:

<?php

if (!extension_loaded('php_mssql')) {
   dl('php_mssql.dll');
}

Note that this has been disabled in PHP 5.3 when running in SAPI (in-webserver) mode.

Answer 2

To test if the mssql extension is loaded, use extension_loaded() :

if (extension_loaded("php_mssql")) {}

Note that on Linux, it won't be a .dll, but rather a .so shared object library, and connections to MSSQL will probably require enabling the FreeTDS libraries on the Linux server.