Changing style if post is in category 1 AND category 2

<?php
	if ( in_category( 'new events' ) && in_category( 'old events' ) ) {

?>

Hi and many thanks,

I’ve realised that maybe I’m approaching this incorrectly but not quite sure! This is a rough of what I have, not quite working. I presumed that if I could stipulate the style for posts that were in 2 categories, then it would over-ride the style for posts in single cats – this doesn’t seem to be the case.

[Code moderated as per the Forum Rules. Please use the pastebin]

Might have a re-think!

Oops, sorry!
https://pastebin.com/MVYkqa1q

might be a problem with the understanding the if/elseif/else structure:
https://php.net/manual/en/control-structures.elseif.php

even if the post is in both categories, the first if statement will be true and the else (with the &&) will not get checked.

try:
https://pastebin.com/tm1f9gsC

depending on the location of that code, you also might need to use the absolute paths to the images

thanks alchymyth, will give it a go! ??

As it happened I finally didn’t need to combine styles but thanks for your help! I have another question if anyone has a spare moment!

I want to give posts different colours depending on which category they are in. I’ve tried this:

https://pastebin.com/EVhza7mM

But I get an error (site doesn’t load at all). My php is not good so I’m probably doing something silly here? ??

remove line 4, 11, and 18; and change (line 23) the <?php endif; ?> to <?php } ?>

Funnily enough I had tried that earlier this morning but I get the same page error. Here’s my entire page, just in case there is something I missed & if you have time.. many thanks again.

https://pastebin.com/S5gwjmTm