Update WordPress post title from an ACF field value on save. (Advanced Custom Fields)

sync_acf_post_title.php

<?php
/**
 * Update Post Title from an ACF field value on post save.
 *
 * Triggers on save, edit or update of published posts.
 * Works in "Quick Edit", but not bulk edit.
 */
function sync_acf_post_title($post_id, $post, $update) {
    
    $acf_title = get_field('my_acf_field_name', $post_id); // NOTE: enter the name of the ACF field here
    if ( $title ) {
        $title = $acf_title;
    } else {
        $title = $post->post_title;
    }
    
    $content = array(
        'ID' => $post_id,
        'post_title' => $title
    );
    remove_action('save_post', 'sync_acf_post_title'); // prevent a loop
    wp_update_post($content);
    
    add_action('save_post', 'sync_acf_post_title');
}
add_action('save_post', 'sync_acf_post_title', 10, 3);

• Add this function into your theme's functions.php file (or appropriate plugin file).
• Update my_acf_field_name to the name of the ACF field you wish to use for the title.

Thank you so much for this Gist!

I only had an problem with line 24, I removed it and now everything works.
I also added a check for the current CPT: Wordpress: ACF-Field as CPT Title

Thanks,
Luka

if ( $title ) { in line 24 doesn't return anything, this must be changed to if ( $acf_title ) { to check if the ACF fields are empty.

There is an option that this will work even if the JetEngine plugin