[Show All Post Meta Keys and Values for a Post in WordPress] If you wanted to see all the post meta keys and values for a post,page or custom post type in WordPress you can either see them in the database in the wp_postmeta table or you could use the get_post_meta function to retrieve all the post meta or a specific key. #wordpress #cpt #get_pos…

functions.php

/* 
If you wanted to see all the post meta keys and values for a post,page or custom post type in WordPress you can either see them in the database in the wp_postmeta table or you could use the get_post_meta function to retrieve all the post meta or a specific key.

To output the data to the head of the page you can just hook the output to wp_head.

You can also use this code in a shortcode inside a query.

Source: https://wpbeaches.com/show-all-post-meta-keys-and-values-for-a-post-in-wordpress/
*/

add_action('wp_head', 'output_all_postmeta' );
function output_all_postmeta() {

	$postmetas = get_post_meta(get_the_ID());

	foreach($postmetas as $meta_key=>$meta_value) {
		echo $meta_key . ' : ' . $meta_value[0] . '<br/>';
	}
}

Note that if there are multiple entries for a single meta_key, this function will output only the first one found, so it is not actually outputting "all post meta" as the function name implies.