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global_terms

Definition:
function global_terms( $term_id, $deprecated = '' ) {}

Maintains a canonical list of terms by syncing terms created for each blog with the global terms table.

Parameters

  • int $term_id: An ID for a term on the current blog.
  • $deprecated

Return values

returns:An ID from the global terms table mapped from $term_id.

Source code

function global_terms( $term_id, $deprecated = '' ) {

	global $wpdb;

	static $global_terms_recurse = null;



	if ( !global_terms_enabled() )

		return $term_id;



	// prevent a race condition

	$recurse_start = false;

	if ( $global_terms_recurse === null ) {

		$recurse_start = true;

		$global_terms_recurse = 1;

	} elseif ( 10 < $global_terms_recurse++ ) {

		return $term_id;

	}



	$term_id = intval( $term_id );

	$c = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->terms WHERE term_id = %d", $term_id ) );



	$global_id = $wpdb->get_var( $wpdb->prepare( "SELECT cat_ID FROM $wpdb->sitecategories WHERE category_nicename = %s", $c->slug ) );

	if ( $global_id == null ) {

		$used_global_id = $wpdb->get_var( $wpdb->prepare( "SELECT cat_ID FROM $wpdb->sitecategories WHERE cat_ID = %d", $c->term_id ) );

		if ( null == $used_global_id ) {

			$wpdb->insert( $wpdb->sitecategories, array( 'cat_ID' => $term_id, 'cat_name' => $c->name, 'category_nicename' => $c->slug ) );

			$global_id = $wpdb->insert_id;

			if ( empty( $global_id ) )

				return $term_id;

		} else {

			$max_global_id = $wpdb->get_var( "SELECT MAX(cat_ID) FROM $wpdb->sitecategories" );

			$max_local_id = $wpdb->get_var( "SELECT MAX(term_id) FROM $wpdb->terms" );

			$new_global_id = max( $max_global_id, $max_local_id ) + mt_rand( 100, 400 );

			$wpdb->insert( $wpdb->sitecategories, array( 'cat_ID' => $new_global_id, 'cat_name' => $c->name, 'category_nicename' => $c->slug ) );

			$global_id = $wpdb->insert_id;

		}

	} elseif ( $global_id != $term_id ) {

		$local_id = $wpdb->get_row( $wpdb->prepare( "SELECT term_id FROM $wpdb->terms WHERE term_id = %d", $global_id ) );

		if ( null != $local_id )

			$local_id = global_terms( $local_id );

			if ( 10 < $global_terms_recurse )

				$global_id = $term_id;

	}



	if ( $global_id != $term_id ) {

		if ( get_option( 'default_category' ) == $term_id )

			update_option( 'default_category', $global_id );



		$wpdb->update( $wpdb->terms, array('term_id' => $global_id), array('term_id' => $term_id) );

		$wpdb->update( $wpdb->term_taxonomy, array('term_id' => $global_id), array('term_id' => $term_id) );

		$wpdb->update( $wpdb->term_taxonomy, array('parent' => $global_id), array('parent' => $term_id) );



		clean_term_cache($term_id);

	}

	if( $recurse_start )

		$global_terms_recurse = null;



	return $global_id;

}

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