idpokute · October 16, 2019 14:33
diff --git a/functions.php b/functions.php
 /*
 Following code is solved the return type issue and if condition syntax error. The original code that is from Stackoverflow, but it had two issues; return type is not consistent and a logical sytax error.

 original: https://stackoverflow.com/questions/42462187/wordpress-rest-api-v2-how-to-list-taxonomy-terms

 endpoint: http://youdomain.com/wp-json/wp/v2/all-terms?term=you_taxonomy
 */

 class All_Terms {
 	public function __construct() {
 		$version   = '2';
 		$namespace = 'wp/v' . $version;
 		$base      = 'all-terms';

 		register_rest_route($namespace, '/' . $base, array(
 			'methods' => 'GET',
 			'callback' => array( $this, 'get_all_terms' ),
 		));
 	}

 	public function get_all_terms( $object ) {
 		$return = array();
 		// $return['categories'] = get_terms('category');
 		// $return['tags'] = get_terms('post_tag');

 		// Get taxonomies
 		$args = array(
 			'public'   => true,
 			'_builtin' => false,
 		);
 		$output   = 'names'; // or objects
 		$operator = 'and';     // 'and' or 'or'

 		$taxonomies = get_taxonomies( $args, $output, $operator );


 		foreach ( $taxonomies as $key => $taxonomy_name ) {
 			if ( $taxonomy_name == $_GET['term'] ) {
 				$return = get_terms( $taxonomy_name );

 				// When array is not sequential, it becomes object by wp_json_encode at the end.
 				// Let's make it sequential array.
 				$return = array_values( $return );
 			}
 		}
 		return new WP_REST_Response( $return, 200 );
 	}
 }

 add_action('rest_api_init', function () {
 	$all_terms = new all_terms;
 });
	/*
	Following code is solved the return type issue and if condition syntax error. The original code that is from Stackoverflow, but it had two issues; return type is not consistent and a logical sytax error.

	original: https://stackoverflow.com/questions/42462187/wordpress-rest-api-v2-how-to-list-taxonomy-terms

	endpoint: http://youdomain.com/wp-json/wp/v2/all-terms?term=you_taxonomy
	*/

	class All_Terms {
	public function __construct() {
	$version = '2';
	$namespace = 'wp/v' . $version;
	$base = 'all-terms';

	register_rest_route($namespace, '/' . $base, array(
	'methods' => 'GET',
	'callback' => array( $this, 'get_all_terms' ),
	));
	}

	public function get_all_terms( $object ) {
	$return = array();
	// $return['categories'] = get_terms('category');
	// $return['tags'] = get_terms('post_tag');

	// Get taxonomies
	$args = array(
	'public' => true,
	'_builtin' => false,
	);
	$output = 'names'; // or objects
	$operator = 'and'; // 'and' or 'or'

	$taxonomies = get_taxonomies( $args, $output, $operator );


	foreach ( $taxonomies as $key => $taxonomy_name ) {
	if ( $taxonomy_name == $_GET['term'] ) {
	$return = get_terms( $taxonomy_name );

	// When array is not sequential, it becomes object by wp_json_encode at the end.
	// Let's make it sequential array.
	$return = array_values( $return );
	}
	}
	return new WP_REST_Response( $return, 200 );
	}
	}

	add_action('rest_api_init', function () {
	$all_terms = new all_terms;
	});