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get_term › WordPress Function

Since2.3.0
Deprecatedn/a
› get_term ( $term, $taxonomy = '', $output = OBJECT, $filter = 'raw' )
Parameters: (4)
  • (int|WP_Term|object) $term If integer, term data will be fetched from the database, or from the cache if available. If stdClass object (as in the results of a database query), will apply filters and return a `WP_Term` object with the `$term` data. If `WP_Term`, will return `$term`.
    Required: Yes
  • (string) $taxonomy Optional. Taxonomy name that `$term` is part of.
    Required: No
    Default: (empty)
  • (string) $output Optional. The required return type. One of OBJECT, ARRAY_A, or ARRAY_N, which correspond to a WP_Term object, an associative array, or a numeric array, respectively. Default OBJECT.
    Required: No
    Default: OBJECT
  • (string) $filter Optional. How to sanitize term fields. Default 'raw'.
    Required: No
    Default: 'raw'
See:
Returns:
  • (WP_Term|array|WP_Error|null) WP_Term instance (or array) on success, depending on the `$output` value. WP_Error if `$taxonomy` does not exist. Null for miscellaneous failure.
Defined at:
Codex:
Change Log:
  • 4.4.0

Gets all term data from database by term ID.

The usage of the get_term function is to apply filters to a term object. It is possible to get a term object from the database before applying the filters. $term ID must be part of $taxonomy, to get from the database. Failure, might be able to be captured by the hooks. Failure would be the same value as $wpdb returns for the get_row method. There are two hooks, one is specifically for each term, named 'getterm', and the second is for the taxonomy name, 'term$taxonomy'. Both hooks gets the term object, and the taxonomy name as parameters. Both hooks are expected to return a term object. {@see 'get_term'} hook - Takes two parameters the term Object and the taxonomy name. Must return term object. Used in getterm() as a catch-all filter for every $term. {@see 'get$taxonomy'} hook - Takes two parameters the term Object and the taxonomy name. Must return term object. $taxonomy will be the taxonomy name, so for example, if 'category', it would be 'get_category' as the filter name. Useful for custom taxonomies or plugging into default taxonomies.


Related Functions: get_terms, get_term_by, get_theme, get_themes, get_footer

Source 

function get_term( $term, $taxonomy = '', $output = OBJECT, $filter = 'raw' ) {
	if ( empty( $term ) ) {
		return new WP_Error( 'invalid_term', __( 'Empty Term.' ) );
	}

	if ( $taxonomy && ! taxonomy_exists( $taxonomy ) ) {
		return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) );
	}

	if ( $term instanceof WP_Term ) {
		$_term = $term;
	} elseif ( is_object( $term ) ) {
		if ( empty( $term->filter ) || 'raw' === $term->filter ) {
			$_term = sanitize_term( $term, $taxonomy, 'raw' );
			$_term = new WP_Term( $_term );
		} else {
			$_term = WP_Term::get_instance( $term->term_id );
		}
	} else {
		$_term = WP_Term::get_instance( $term, $taxonomy );
	}

	if ( is_wp_error( $_term ) ) {
		return $_term;
	} elseif ( ! $_term ) {
		return null;
	}

	// Ensure for filters that this is not empty.
	$taxonomy = $_term->taxonomy;

	$old_term = $_term;
	/**
	 * Filters a taxonomy term object.
	 *
	 * The {@see 'get_$taxonomy'} hook is also available for targeting a specific
	 * taxonomy.
	 *
	 * @since 2.3.0
	 * @since 4.4.0 `$_term` is now a `WP_Term` object.
	 *
	 * @param WP_Term $_term    Term object.
	 * @param string  $taxonomy The taxonomy slug.
	 */
	$_term = apply_filters( 'get_term', $_term, $taxonomy );

	/**
	 * Filters a taxonomy term object.
	 *
	 * The dynamic portion of the hook name, `$taxonomy`, refers
	 * to the slug of the term's taxonomy.
	 *
	 * Possible hook names include:
	 *
	 *  - `get_category`
	 *  - `get_post_tag`
	 *
	 * @since 2.3.0
	 * @since 4.4.0 `$_term` is now a `WP_Term` object.
	 *
	 * @param WP_Term $_term    Term object.
	 * @param string  $taxonomy The taxonomy slug.
	 */
	$_term = apply_filters( "get_{$taxonomy}", $_term, $taxonomy );

	// Bail if a filter callback has changed the type of the `$_term` object.
	if ( ! ( $_term instanceof WP_Term ) ) {
		return $_term;
	}

	// Sanitize term, according to the specified filter.
	if ( $_term !== $old_term || $_term->filter !== $filter ) {
		$_term->filter( $filter );
	}

	if ( ARRAY_A === $output ) {
		return $_term->to_array();
	} elseif ( ARRAY_N === $output ) {
		return array_values( $_term->to_array() );
	}

	return $_term;
}