How do I determine the PHP execution mode on my shared hosting server?

How to Determine the PHP Execution Mode on a Server

As a shared hosting user, you may wonder if PHP runs through FastCGI, CGI, or Apache's mod_php module on your server. Here's how to find out without consulting your hoster:

Inspecting phpinfo()

The "Server API" line at the top of the phpinfo() output reveals the current execution mode. For example, "Apache 2.0 Handler CGI/FastCGI" indicates that PHP is either using CGI or FastCGI.

Using php_sapi_name()

Alternatively, you can use the php_sapi_name() function or PHP_SAPI constant to retrieve the same information. This provides a more concise result, such as "cgi" or "fastcgi."

Caveats

Note that these methods may not provide exact version numbers or identify specific CGI handlers. They simply report the active Server API interface.

Additional Considerations

Always refer to your hosting provider's documentation, as multiple PHP versions may be available. Additionally, remember to run phpinfo() from the environment you're interested in checking. For example, the command-line phpinfo() output will differ from the web application's.

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