阻止HTTP POST请求

I am seeing an usually high number of HTTP POST requests on my website, and I was wondering: Is there any way to block a POST request on a particular php page by making modifications to either the php file or .htaccess file? Thanks in advance!

In native PHP it's as simple as checking one $_SERVER variable:

if ($_SERVER['REQUEST_METHOD'] == 'POST') {
    die('Post is not allowed');
}

Within .htaccess, use a combination of <Files> and <limit>:

<Files myfile.php>
    <Limit POST> 
        Order deny,allow 
        Deny from all 
    </Limit>
</files>

if ($_SERVER['REQUEST_METHOD']) == 'POST') die();