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Source View: terms_clauses

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Understanding Source Code

The best way to understand what a hook does is to look at where it occurs in the source code.

  • Action hooks look like this: do_action( "hook_name" )
  • Filter hooks look like this: apply_filters( "hook_name", "what_to_filter" ).

Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.

Source View

Line Code
1457      }
1458
1459      $_fields = $fields;
1460
1461      $fields = implode( ', ', apply_filters( 'get_terms_fields', $selects, $args, $taxonomies ) );
1462
1463      $join = "INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id";
1464
1465      $pieces = array( 'fields', 'join', 'where', 'orderby', 'order', 'limits' );
1466      $clauses = apply_filters( 'terms_clauses', compact( $pieces ), $taxonomies, $args );
1467      foreach ( $pieces as $piece )
1468           $$piece = isset( $clauses[ $piece ] ) ? $clauses[ $piece ] : '';
1469
1470      $query = "SELECT $fields FROM $wpdb->terms AS t $join WHERE $where $orderby $order $limits";
1471
1472      $fields = $_fields;
1473
1474      if ( 'count' == $fields ) {
1475           $term_count = $wpdb->get_var($query);