Learning To Code In PHP: The adding conditional code.

my-function-that-does-stuff-conditionally.php

// Use this if working with Genesis
//add_action( 'genesis_before', 'my_function_that_does_stuff' );

// Use this if working with BB Theme
//add_action( 'fl_body_open', 'my_function_that_does_stuff' );

function my_function_that_does_stuff() {

  if( is_page() ) {

    echo 'Hello Page!';

  } elseif( is_single() ) {

    echo 'Hello Post!';

  } else {

    echo 'Hello World!';

  }

}