How to avoid line breaking between two statements after reformatting code?

I have a short code here and it includes 2 statements, and I expect 2 statements are in one line. 

<?php a(); b(); ?>

But after I formatting it, it become

<?php a();
b(); ?>

I cannot find that any options in settings can avoid line breaking between two statements. Is there any options or ways in PhpStorm can avoid line breaking between two statements?