advanced custom field not return back result - php

Question

i am using advanced custom filed and i made custom author field (it could be Publisher Or Brand etc) now this author's name is not printing on product (Book) page . in custom field its for author's name slug is 'names'
add_action( 'woocommerce_after_single_product_summary', "ACF_product_content", 10 );
function ACF_product_content(){
echo '<h2> ACF Content </h2>';
if (function_exists('the_field')){
echo '<p>Woohoo, the_field function exists! </p>';
//the_field('authors');
echo '<pre>';
print_r(get_the_ID());
echo '</pre>';
echo '<pre>';
print_r(get_field('authors'));
echo '</pre>';
die;
}
}
for this i got the result
Check this report screenshot
. now problem is to show the Authors name which is ['post_title'] in this array.
i tried so many solutions but not working its not showing the result.
i used to show this result by this code
echo the_field('names');
'names' is the field name in 'Authors' custom field.

Answer 1

try this code for ACF
<?php
echo get_field('your custom filed slug name',get_the_ID());
?>
fetch the post title
<?php echo get_the_title(); ?>
for display author name for below function
<?php echo get_the_author(); ?>

Answer 2

You may use one of the methods below . You have to strictly set $post otherwise get_the_ID() funtion return false.
global = $post;
$custom_key = 'author';
$post_id = get_the_ID();
echo $customer_key_value = get_post_meta( $post_id, $custom_key , true );
OR
global = $post;
$custom_key = 'author';
$post_id = get_the_ID();
$custom_values = get_post_custom_values( $custom_key , $post_id );
foreach ( $custom_values as $key => $value ) {
echo "$key => $value <br />";
}