Add class to current Wordpress Post Title - php

Question

I am working on a services cpt and would like to display a list of other posts, within the same cpt on the single post.
The code I am using is:
<?php
$loop = new WP_Query( array(
'post_type' => 'services',
'posts_per_page' => 6
));
?>
<ul>
<?php while ( $loop->have_posts() ) : $loop->the_post(); ?>
<li>
<a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>">
<h4><?php the_title(); ?></h4>
</a>
</li>
<?php endwhile; wp_reset_query(); ?>
</ul>
Now my question is, is there a way to add a class to the current post? The intention being to style it different to the other posts in the list.

Answer 1

This is very easy you can always add the class in before and after
Read this documentation https://developer.wordpress.org/reference/functions/the_title/
<?php the_title( '<div class="wrapper">', '</div>' ); ?>

Answer 2

Yes First get current post id and match that id with loop id and if it is same than just add class whereever you want just use below code
<?php
$current_post_id = get_the_ID();
$loop = new WP_Query( array(
'post_type' => 'services',
'posts_per_page' => 6, ));
?>
<ul>
<?php
while ( $loop->have_posts() ) : $loop->the_post();
$class = ($current_post_id == $loop->ID) ? "current-post" : '';
?>
<li class="<?php echo $class; ?>">
<a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>">
<h4><?php the_title(); ?></h4>
</a>
</li>
<?php endwhile; wp_reset_query(); ?>
</ul>
It will add class "current-post" to only current post and in other posts it will add nothing.
style using
<style>
li{
/*all posts*/
}
li.current-post{
/*specific for the current post*/
}
</style>

Answer 3

Using function
<?php post_class(); ?>
E.g:
<div <?php post_class(); ?>>
<?php
$loop = new WP_Query( array(
'post_type' => 'services',
'posts_per_page' => 6
));
?>
<ul>
<?php while ( $loop->have_posts() ) : $loop->the_post(); ?>
<li <?php post_class(); ?>>
<a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>">
<h4><?php the_title(); ?></h4>
</a>
</li>
<?php endwhile; wp_reset_query(); ?>
</ul>