Add script to footer – on post editor
Hook into ‘admin_footer-post-new.php’ and ‘admin_footer-post.php’, check the global variable $post_type: add_action( ‘admin_footer-post-new.php’, ‘wpse_73692_script’ ); add_action( ‘admin_footer-post.php’, ‘wpse_73692_script’ ); function wpse_73692_script() { if ( ‘post’ !== $GLOBALS[‘post_type’] ) return; ?> <script>alert( ‘<?php echo $GLOBALS[‘post_type’];?>’ );</script> <?php }