Exclude current post from an array of posts?

Question

I'm trying to exclude the current post from an array and I know that the codex says that it's not possible to combine post__in and post__not_in in the same query...

But in wordpress everything (well, almost...) is possible and I know that must be a way to exclude the current post from my posts array.

If I can't use the together, how can I exclude current post from the array? Any hints are very welcome.

This is my current query:

$this_post = $post->ID;
$args = array('post__in' => array(17,111,108,158), 'post__not_in' => array($this_post));
$posts = new WP_Query($args);

Answer 1

Use array_diff() to remove the current post ID from an array of other post IDs.

$include = array( 17, 111, 108, 158);
$include = array_diff( $include, array( $post->ID ) );
$args = array( 'post__in' => $include );
$posts = new WP_Query( $args );

Edit to include a point raised by Pieter Goosen--If $include is not a hard-coded array of IDs but something that comes from the database, you should verify that it is not empty() prior to performing the query. Passing an empty array to 'post__in' will get an unfiltered list of posts, rather than returning no posts as you might expect.