Tomcat configuration php cannot use $_post, $_get

When I was in charge of a website using JSP dynamic web technology, I happened to have some functions written in PHP, so I immediately thought of making Tomcat support PHP. Tomcat is also produced by Apache, does it only support JSP? Can I use PHP on Tomcat? After searching online, I quickly got the answer to the first question: Tomcat can support CGI, such as Perl (see attachment for specific settings). But I continue to search, but I have been unable to find a way to let Tomcat use PHP. Generally, I use the method of installing Apache and Tomcat to coexist to build a so-called Web platform that supports PHP+JSP.

Of course, in fact, PHP itself also supports the use of CGI, so I tried it myself (on Windows operating system): First follow the attachment The method is to make Tomcat support CGI, and then change web.xml, and add:

## to the configuration section where the servlet-name is cgi. #

<init-param>
<param-name>executable</param-name>
<param-value>php</param-value>
</init-param>

#And add the PHP installation path to Path, so that Tomcat can run to PHP.exe. After restarting Tomcat, create a new cgi directory under the WEB-INF directory, put the PHP files here, and then use the virtually mapped cgi-bin directory to access these PHPs. document.
But if you don’t make any changes to the PHP file, you may find that there is no output. You need to add a line to the header of the PHP file and output two carriage returns:
echo "\n\n";
The reason is not clear. It may be waiting for Content-type input, or Perl's cgi programming style.
But with this configuration, variables such as $_REQUEST, $_GET, $_POST in PHP (version 4.1.0 or above) cannot be used. QueryString can only be obtained from server variables or environment variables: $_SERVER["QUERY_STRING"], $_ENV["QUERY_STRING"]. Maybe POST submission of the form is not supported... I haven't tried it yet.
Since I am not familiar with Tomcat, these are just minor fixes on the current method. There may be good practices, and I hope you will give me your advice!

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