This is probably a super simple question.

But how do I echo the ID of a user on author.php?

I've tried


But it didn't seem to want to work. I want to echo it at the end of a URL, for example;


Obviously, where "id" is that particular author's ID

Any ideas?

  • Not the permalinks, its for a modified version of the UserPhoto plugin. I want to hardcode a particular image link into author.php and as each user's images are appeneded with their author ID I need to include that in the link Commented Dec 1, 2011 at 10:54

3 Answers 3


Try this code.

$author = get_user_by( 'slug', get_query_var( 'author_name' ) );
echo $author->ID;

Alternatively, if author name has not been set use:

if ( $author_id = get_query_var( 'author' ) ) { $author = get_user_by( 'id', $author_id ); }

credit @AndyAdams in the easily missed comments bellow

  • This gives me a 500 internal server error Commented Dec 1, 2011 at 11:01
  • Are you sure it is because of the above code.. could I have a look at your author.php? Commented Dec 1, 2011 at 11:05
  • $author = get_user_by( 'slug', get_query_var( 'author_name' ) ); gave no problems, it was the echo author->ID; that caused the error for some reason Commented Dec 1, 2011 at 11:07
  • Oops there is a typo.. its echo $author->ID... notice the '$'. Updated the answer. Commented Dec 1, 2011 at 11:08
  • 1
    Both of you missed a dollar sign. echo $author->ID; Commented Dec 1, 2011 at 11:09

Try this simply code

if (is_author()){
    $author = get_queried_object();
    $author_id = $author->ID;
  • 3
    A simpler way to do this would be $author_id = get_queried_object_id();
    – Gavin
    Commented Nov 17, 2017 at 20:20

if var_dump(the_author_meta('ID')) is Null your author has no posts.

Try use echo $author if you call it inside author.php

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