php if something equals x, y or z

I am writing out some php logic, and I'm trying to simplify something.

Is it possible to write something like the following:

<?php if( (get_theme_mod('header_image_location')=='x', 'y' or 'z' ) {?> 
    //Do something 
<?php } ?>

I must I do it like this:

<?php if( (get_theme_mod('header_image_location')=='x') ||  (get_theme_mod('header_image_location')=='y') || (get_theme_mod('header_image_location')=='z') ) {?> 
    //Do something 
<?php } ?>

Just want to know if I can simplify the bottom example. Thanks