Doesn't work

your theme has some bug, because the_title_icon has 2 parameters, the 1st is post_id and is required, the 2nd is an optional boolean whether to echo (true) or return (false) the string.

I use the mystique theme from digitalsignature.

I just tested it on an other theme which is the default wordpress theme.

I didn’t add an icon but it already gave that error I posted in the first post.

Doesn’t work on that either.

So I don’t think the issue is down my side?

it looks like it’s in this file: /wp-content/themes/mystique2/templates/single.php on line 41

I know that because I added the code in that file. -_-

so pass the post_id as 1st parameter

what do you mean?

the_title_icon($post_id) or the_title_icon(get_the_ID())

Could you post the full code that I have to add?

Like:

<?php if (function_exists(‘the_title_icon’)) the_title_icon(); ?>

Sorry, I can’t read your mind. If this doesn’t help, then maybe post your code…

My code is simply:

<?php if (function_exists(‘the_title_icon’)) the_title_icon(); ?>

As you instructed to post as code in single.php, index.php, etc…

I only added it in single.php to test out if it works which it doesn’t.

<?php if (function_exists('the_title_icon')) the_title_icon(get_the_ID()); ?>

Okay. I tried it out.

But it doesn’t work properly.

Demo link: https://www.projectideas.net/news/ (title doesn’t display but instead some sort of img code?)

Its almost working!

So I’m very happy but not yet fully pleased.

can you also post the 2 lines before and the 2 lines after the the_title_icon in your theme’s code?

This is from teaser.php:
Which displays in the archive (archive.php) and I also think single post but for single post there is also an other file called single.php

<?php if(atom()->options('post_title')): ?>
    <h2 class="title">
     <?php if (function_exists('the_title_icon')) the_title_icon(get_the_ID()); ?> <a href="<?php atom()->post->URL(); ?>" rel="bookmark" title="<?php atom()->te('Permanent Link: %s', atom()->post->getTitle()); ?>"><?php atom()->post->title(); ?></a>
    </h2>
    <?php endif; ?>

instead of
atom()->post->getTitle()
try:
atom()->post->getTitleAttribute()
I’m not sure about the function, but in the old wordpress notation you would need the_title_attribute() instead of the_title()