/cpt_term_list.php
Created Dec 21, 2016
Get a list of terms from a shared taxonomy that are used on a particular post type only
| <?php ?> | |
| <label for="filter-country">Country</label> | |
| <select id="filter-country" class="form-control" name="country"> | |
| <option selected="" value="">All countries</option> | |
| <?php | |
| if ( false === ( $cptcountries = get_transient( 'cpt_countries' ) ) ) { | |
| global $wpdb; | |
| $cpt_countries = $wpdb->get_col( "select distinct term_taxonomy_id from $wpdb->term_relationships where object_id in ( select ID from $wpdb->posts where post_type='cpt' )" ); | |
| $cptcountries = get_terms( array( 'taxonomy' => 'country', 'include' => $cpt_countries ) ); | |
| if ( ! empty( $cptcountries ) && ! is_wp_error( $cptcountries ) ) { | |
| set_transient( 'cpt_countries', $cptcountries, 4 * HOUR_IN_SECONDS ); | |
| } | |
| } | |
| if ( ! empty( $cptcountries ) && ! is_wp_error( $cptcountries ) ) { | |
| foreach ( $cptcountries as $country ) { | |
| echo '<option ' . selected( $cptcountry, $country->slug ) . ' value="' . esc_attr( $country->slug ) . '">' . esc_html( $country->name ) . '</option>'; | |
| } | |
| } | |
| ?> | |
| </select> |
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