I’m pretty sure $_REQUEST['post_id'] will hold the post ID you are attaching uploads to. So something like this perhaps:
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if ( isset( $_REQUEST['post_id'] ) && $post_id = absint( $_REQUEST['post_id'] ) ) { switch ( get_post_type( $post_id ) ) { case 'document' : if ( ! in_array( $type, array( 'pdf', 'msword', 'vnd.ms-excel' ) ) ) $file['error'] = '...'; break; case 'illustration' : // and so forth } } |
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