I need to get the field of custom post type on advance custom field

Question

<?php $series = get_field('series'); ?>

<?php foreach($series as $series):?>

        <a href="<?php echo get_page_link($series->ID);?>">
        <img src="<?php echo get_the_post_thumbnail_url($series->ID, 'thumbnail');?> ">
         <h3><?php echo $series->post_title;?></h3>
          
         <!-- <?php the_field('series_details');?> This is the field that i want to pull out -->

       </a>

<?php endforeach;?>

i need to get the field of acf on my custom post type.

Answer 1

When getting field values outside the loop, you need to pass the id of the current object (Post, Term, User) as the second parameter to the functions get_the_field or the_field. Like so:

<?php $series = get_field('series'); ?>

<?php foreach($series as $series): ?>

        <a href="<?php echo get_page_link($series->ID);?>">
        <img src="<?php echo get_the_post_thumbnail_url($series->ID, 'thumbnail'); ?> ">
         <h3><?php echo $series->post_title;?></h3>
          
         <?php the_field('series_details', $series->ID); ?> <!--  This is the field that i want to pull out -->

       </a>

<?php endforeach; ?>

ACF Documentation: https://www.advancedcustomfields.com/resources/the_field/

The same applies if you are using WordPress' inbuilt get_post_meta or get_user_meta, only you pass the id as the first parameter

https://developer.wordpress.org/reference/functions/get_post_meta/