If php is added to html, nothing will be displayed.

Create a new html file with the following content:

When executed, it was found that there was no content displayed on the page, " "No expected output;

In the configuration of apache (recommended:php server) (/usr/local/ apache/conf/httpd.conf), the html file is not added to the executable type, as follows:

As you can see, only the extensions are .php and . phtml files will be executed. So add .html and restart apache, the display is normal

service httpd {start|restart|stop}

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