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wp-content/plugins/wordpress-seo/inc/class-wpseo-custom-taxonomies.php

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+<?php
+/**
+ * WPSEO plugin file.
+ *
+ * @package WPSEO
+ */
+
+/**
+ * WPSEO_Custom_Taxonomies.
+ */
+class WPSEO_Custom_Taxonomies {
+
+	/**
+	 * Custom taxonomies cache.
+	 *
+	 * @var array
+	 */
+	protected static $custom_taxonomies = null;
+
+	/**
+	 * Gets the names of the custom taxonomies, prepends 'ct_' and 'ct_desc', and returns them in an array.
+	 *
+	 * @return array The custom taxonomy prefixed names.
+	 */
+	public static function get_custom_taxonomies() {
+		// Use cached value if available.
+		if ( ! is_null( self::$custom_taxonomies ) ) {
+			return self::$custom_taxonomies;
+		}
+
+		self::$custom_taxonomies = [];
+		$args                    = [
+			'public'   => true,
+			'_builtin' => false,
+		];
+		$custom_taxonomies       = get_taxonomies( $args, 'names', 'and' );
+
+		if ( is_array( $custom_taxonomies ) ) {
+			foreach ( $custom_taxonomies as $custom_taxonomy ) {
+				array_push(
+					self::$custom_taxonomies,
+					self::add_custom_taxonomies_prefix( $custom_taxonomy ),
+					self::add_custom_taxonomies_description_prefix( $custom_taxonomy )
+				);
+			}
+		}
+
+		return self::$custom_taxonomies;
+	}
+
+	/**
+	 * Adds the ct_ prefix to a taxonomy.
+	 *
+	 * @param string $taxonomy The taxonomy to prefix.
+	 *
+	 * @return string The prefixed taxonomy.
+	 */
+	private static function add_custom_taxonomies_prefix( $taxonomy ) {
+		return 'ct_' . $taxonomy;
+	}
+
+	/**
+	 * Adds the ct_desc_ prefix to a taxonomy.
+	 *
+	 * @param string $taxonomy The taxonomy to prefix.
+	 *
+	 * @return string The prefixed taxonomy.
+	 */
+	private static function add_custom_taxonomies_description_prefix( $taxonomy ) {
+		return 'ct_desc_' . $taxonomy;
+	}
+}