Does not work php in html

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#1

https://webfortestingphp.000webhostapp.com/
does not work php in html

I have a lot of lines like <? if (mysqli_num_rows($users) > 0) { ?>

Please tell me what am I doing wrong?

#2

@the_veronika Avoid using php short tags, instead try the below:

<?php (your functions) ?>