Pfff, That’s work with a explode function
Results :
<?php query_posts(array( 'post_type' => array( 'developer-editor' ), 'orderby' => 'title', 'order' => 'ASC', 'post__in' => explode(',',$developer_id), ) ); ?><?php if (have_posts()) : while (have_posts()) : the_post(); ?>
I will reflect 2 minutes more before to post my problem the next time. ??