If Statement (Do Nothing) [on hold]

this question is really about bad practice when it comes to PHP. I'm learning how to code in this language and I can already code in Lua & Python. When an if statement is told to "do nothing" in Lua, you would literally just say "return", but I understand that doesn't work in PHP. I've been using print() instead, but I understand that's probably bad practice and I was wondering if there was a function for doing nothing.

    if (condition) { //If condition is met
        print(""); //Do Nothing
    } else { 
        //Run the function;
    }

Thank you in advance.