view - Doubts about simple MVC implementation in PHP

Question

Why does the PHP framework controller layer load a file with a .tpl suffix? I wrote
<?php

in the file.

echo $name; //居然能输出正确的值

//Question, why can files with .tpl suffix also be able to execute PHP scripts? Isn’t it possible to parse PHP only by using .PH files?

Answer 1

1. The PHP interpreter only cares about the file content, it doesn’t care what the extension is

2. Require/include other files in the code in one compilation and run cycle, instead of opening a new interpreter every time you open a new file

3. In order to easily distinguish it from other files, a certain extension will be configured on the web server to send to PHP. This is only a restriction on the entry file. After running, what is required/included later has nothing to do with this configuration. If this is not done, , whatever file type it becomes will be sent to PHP for review. This is unrealistic due to performance and security considerations (in other words, you need to treat PHP and the web server independently)

For example
For nginx, it is

    location ~ .*\.(php|php5)?$
    {
        fastcgi_pass   unix:/var/run/php.socket;
        fastcgi_index  index.php;
        include        fastcgi.conf;
    }

For apache, that is

 <FilesMatch \.php$>
    SetHandler application/x-httpd-php
 </FilesMatch>

In fact, you can change it to any extension you want, or even match it completely (of course, it is not recommended to do this)

Answer 2

The framework itself loads the .tpl file and parses it into php code. It's like you load an xml file with php and then parse the xml and output it. What I said isn't quite accurate, but it's about the same meaning.

Answer 3

This is a template file

You can check out the introduction of smarty template