How to get post count of a custom query in wordpress? - wordpress

Question

When I try to get the post count of a custom query in wordpress I get the following error as output.
Warning: array_map(): Argument #2 should be an array in /Applications/XAMPP/xamppfiles/htdocs/wordpress/wp-includes/class-wp-query.php on line 1918
Warning: implode(): Invalid arguments passed in /Applications/XAMPP/xamppfiles/htdocs/wordpress/wp-includes/class-wp-query.php on line 1918
0
So below is my function:
if( !function_exists('my_likes') ){
function my_likes() {
global $current_user;
$current_user = get_current_user_id();
// The Query
$args = array(
'meta_key' =>'likes_count',
'orderby' => 'date',
'post__in' => $current_user
);
$obj_name = new WP_Query($args);
$num = $obj_name->post_count;
print $num;
}
add_action('my_likes', 'my_likes');
}

Answer 1

count($obj_name->posts)
This is an inefficient way to count user posts as it gets all the post object. Perhaps just use a raw SQL query

Answer 2

The line 'post__in' => $current_user is incorrect the post__in should be an array so if you want to use it like this you would need to do 'post__in' => array($current_user)
Also from the context i am not sure is you want to use this line at all, if you want to count posts posted by user identified by $current_user then instead of 'post__in' => $current_user you should use 'author' => $current_user
BTW. the line global $current_user; is not needed there at all and overtwites the global $current_user value.
The complete code should look like this i think
function my_likes() {
$current_user = get_current_user_id();
// The Query
$args = array(
'meta_key' =>'likes_count',
'orderby' => 'date',
'post__in' => array($current_user),
// or 'author' => $current_user
);
$obj_name = new WP_Query($args);
$num = $obj_name->post_count;
print $num;
}