How Do I Use .php Files?

[completesavage]

i have some php files and a button linking the file
<a href="registration.php"><button id="signup" style="color:darkgreen;background-color:lightgreen">test</button></a>
i used the code and when i press the button it just gives me an error. i have code in the .php file
im following a tutorial to make a signup form that saves using SQL and my website it https://pro-gamer.ml

[anon19508339]

@completesavage

gives me an error.

What error?

[anon77371365]

I went to http://pro-gamer.ml/registration.php and got a HTTP 500(most likely your code crashed)

Http error 500