To get the author ID, you can use the get_the_author_meta() function by passing the ID as an argument.
Below is an example of getting the author ID.
Get Author ID in WordPress
<?php // get the author ID for current post $author_id = get_the_author_meta('ID'); // display the author ID. echo $author_id; ?>
Get Author ID by Post ID in WordPress
To get the author ID by post ID, you can use the get_post_field() function, along with the post_author and post_id as parameters.
Below is an example of getting author id by post id.
<?php global $post; // will use get_post_field() with 'post_author' to get author id $author_id = get_post_field('post_author' , $post->ID); // display the author ID. echo $author_id; ?>