How can I add navigation links below WordPress posts using PHP? - php

Question

I am working on a PHP/WordPress-based website and would like to add 3 navigation links (one previous link and 2 next links) below each post of a custom post type. The links should look like this:
[prev] [next] [next]
My current code is below, but it is not working at the moment. How can I get this code to display the desired links?
$currentID = get_the_ID();
$args = array (
'post_type' => array( 'guides' ),
'post_status' => array( 'publish' ),
'nopaging' => false,
'order' => 'DESC',
'orderby' => 'date',
'posts_per_page' => 3,
'ignore_sticky_posts' =>true,
'post__not_in' => array($currentID)
);
$guides_query = new WP_Query( $args );
if ( $guides_query->have_posts() ) {
echo '<div class="grid-container nxt-article">';
echo '<div class="nxt-article-heading"><h2>Next article</h2></div>';
while ( $guides_query->have_posts() ) {
$guides_query->the_post();
echo '<div class="nxt-article-box"><div class="nxt-article-box-shadow">';
echo '<a class="nxt-article-link" href="'.get_the_permalink().'"></a>';
$gear_category = get_field('gear_category', $products->ID);
if ($gear_category) :
echo '<div class="g_pre_title" style="color:#fff;position:absolute;left:30px;top:25px;">'.$gear_category[0].'</div>';
endif;
echo '<div>';
if ( has_post_thumbnail() ) {
the_post_thumbnail( 'post_grid_image' );
}
echo '</div><div style="padding: 0px 30px 30px 30px;"><div class="nxt-article-box-title">'.get_the_title().'</div>';
$intro_section = get_field('introduction_section', $post->ID);
if( $intro_section ) :
echo '<div class="pg_excerpt" style="height:85px;overflow:hidden;">'.wp_trim_words( $intro_section['wysiwyg'], 32, '...' ).'</div>';
endif;
echo '</div></div></div>';
}
echo '<div style="text-align:center;"><a class="ml_button_style" href="">Show ALL GUIDES</a></div>';
echo '</div>';
} else {
}
wp_reset_postdata();