search-extras.php
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<?php
add_action( 'add_attachment', 'add_attachment_mime_type' );
function add_attachment_mime_type( $attachment_id ){
$post = get_post( $attachment_id );
$post_mime_type = explode(".", $post->_wp_attached_file);
update_post_meta( $attachment_id, 'file_type', end($post_mime_type) );
}
function exclude_in_search_results( $query ) {
if ( $query->is_main_query() && $query->is_search() && ! is_admin() ) {
$query->set( 'post_type', array( 'attachment', 'documents') );
$query->set( 'meta_query', array (
'relation' => 'OR',
array (
'relation' => 'AND',
array(
'key' => 'exclude_from_search',
'value' => 1,
'compare' => '!=',
),
),
) );
}
}
add_action( 'pre_get_posts', 'exclude_in_search_results' );
// apply tags to attachments
function wptp_add_tags_to_attachments() {
register_taxonomy_for_object_type( 'post_tag', 'attachment' );
}
add_action( 'init' , 'wptp_add_tags_to_attachments' );