HTTP response is entire PHP file

In my ionic app I have an $ that sends user information to my PHP file. The PHP file then calls a proc to store the information in MySQL and echos the success (either 1 or 0). The problem I’m seeing however is when I log the response to the console, the entire PHP file is printed instead of the success. I found that instead of running the PHP file, it just seems to be printed to the log. Is there a way to fix this? I’m running Ubuntu and I’ve tried adding AddHandler application/x-httpd-php5 .php to my /etc/apache2/apache2.conf but the problem still persists.