Fix deprecation warnings

src/admin/class-wordlift-admin-entity-type-settings.php

@@ -95,7 +95,7 @@ public function admin_menu() {
 		 */
 		// @todo: use the new {@link Wordlift_Admin_Page}.
 		add_submenu_page(
-			null,
+			'wl_entity_type_settings',
 			__( 'Edit Entity term', 'wordlift' ),
 			__( 'Edit Entity term', 'wordlift' ),
 			'manage_options',

src/admin/elements/class-wordlift-admin-select-element.php

@@ -56,7 +56,7 @@ class="<?php echo esc_attr( $params['class'] ); ?>"
 		$this->print_notice( $params['notice'] );
 
 		// Print the field description.
-		echo wp_kses( $this->get_description( $params['description'] ), array( 'p' => array() ) );
+		echo wp_kses( $this->get_description( $params['description'] ) ?? '', array( 'p' => array() ) );
 
 		return $this;
 	}

src/classes/common/background-process/class-background-process.php

@@ -67,7 +67,7 @@ private function is_started( $state ) {
 	 */
 	public function start() {
 		$action = $this->get_action_key();
-		$this->log->debug( "Trying to start  ${action}..." );
+		$this->log->debug( sprintf( "Trying to start  %s...", $action ) );
 		// Create a new Sync_Model state of `started`.
 		if ( ! $this->is_started( self::get_state() ) ) {
 			$this->log->debug( 'Starting...' );
@@ -96,7 +96,7 @@ public function start() {
 	public function cancel() {
 
 		$action = $this->action;
-		$this->log->debug( "Cancelling ${action}..." );
+		$this->log->debug( sprintf( 'Cancelling %s...', $action ) );
 
 		// Cleanup the process data.
 		$this->cancel_process();

src/classes/content/wordpress/class-wordpress-content-id.php

@@ -60,6 +60,7 @@ public function get_type() {
 		return $this->type;
 	}
 
+	#[\ReturnTypeWillChange]
 	public function jsonSerialize() {
 		return array(
 			'id'   => $this->id,

src/classes/google-addon-integration/pages/class-import-page.php

@@ -23,7 +23,7 @@ public function get_menu_title() {
 	}
 
 	protected function get_parent_slug() {
-		return null;
+		return 'wl_google_addon_import';
 	}
 
 	public function render() {

src/classes/mappings/pages/class-edit-mappings-page.php

@@ -76,7 +76,7 @@ private function load_text_settings_for_edit_mapping_page( array $edit_mapping_s
 	 * @return null return null to avoid this page to be displayed in WordLift's menu.
 	 */
 	protected function get_parent_slug() {
-		return null;
+		return 'wl_edit_mappings';
 	}
 
 	/**

src/classes/relation/class-relation.php

@@ -147,6 +147,7 @@ public static function from_relation_instances( $instance ) {
 		);
 	}
 
+	#[\ReturnTypeWillChange]
 	public function jsonSerialize() {
 		return array(
 			'subject'   => $this->get_subject(),

src/classes/relation/class-relations.php

@@ -61,22 +61,23 @@ public function contains( Relation ...$values ) {
 		return true;
 	}
 
-	public function offsetSet( $offset, $value ) {
+	public function offsetSet( $offset, $value ): void {
 		if ( $offset === null ) {
 			$this->container[] = $value;
 		} else {
 			$this->container[ $offset ] = $value;
 		}
 	}
 
-	public function offsetExists( $offset ) {
+	public function offsetExists( $offset ): bool {
 		return isset( $this->container[ $offset ] );
 	}
 
-	public function offsetUnset( $offset ) {
+	public function offsetUnset( $offset ): void {
 		unset( $this->container[ $offset ] );
 	}
 
+	#[\ReturnTypeWillChange]
 	public function offsetGet( $offset ) {
 		return isset( $this->container[ $offset ] ) ? $this->container[ $offset ] : null;
 	}
@@ -85,6 +86,7 @@ public function toArray() {
 		return $this->container;
 	}
 
+	#[\ReturnTypeWillChange]
 	public function jsonSerialize() {
 		return $this->container;
 	}

src/classes/vocabulary-terms/class-entity-type.php

@@ -104,8 +104,8 @@ public function save_field( $term_id ) {
 	public function init_ui_and_save_handlers() {
 		$taxonomies = Terms_Compat::get_public_taxonomies();
 		foreach ( $taxonomies as $taxonomy ) {
-			add_action( "${taxonomy}_edit_form_fields", array( $this, 'render_ui' ), 1 );
-			add_action( "edited_${taxonomy}", array( $this, 'save_field' ) );
+			add_action( "{$taxonomy}_edit_form_fields", array( $this, 'render_ui' ), 1 );
+			add_action( "edited_{$taxonomy}", array( $this, 'save_field' ) );
 		}
 	}
 

src/classes/vocabulary-terms/class-term-metabox.php

@@ -54,8 +54,8 @@ public function save_field( $term_id ) {
 	public function init_all_custom_fields() {
 		$taxonomies = Terms_Compat::get_public_taxonomies();
 		foreach ( $taxonomies as $taxonomy ) {
-			add_action( "${taxonomy}_edit_form", array( $this, 'render_ui' ), 1 );
-			add_action( "edited_${taxonomy}", array( $this, 'save_field' ) );
+			add_action( "{$taxonomy}_edit_form", array( $this, 'render_ui' ), 1 );
+			add_action( "edited_{$taxonomy}", array( $this, 'save_field' ) );
 		}
 	}
 

src/classes/vocabulary-terms/jsonld/class-post-jsonld.php

@@ -23,7 +23,7 @@ public function init() {
 
 	public function wl_post_jsonld_array( $data, $post_id ) {
 
-		$relations = $data['relations'];
+		$relations = $data['relations'] ?? null;
 
 		if ( ! is_a( $relations, 'Wordlift\Relation\Relations' ) ) {
 			return $data;

src/includes/class-wordlift-entity-type-service.php

@@ -456,11 +456,15 @@ function ( $item ) {
 	 *
 	 * @param int $term_id The term ID.
 	 *
-	 * @return array An array of custom fields (see `custom_fields` in Wordlift_Schema_Service).
+	 * @return array|null An array of custom fields (see `custom_fields` in Wordlift_Schema_Service).
 	 * @since 3.32.0
 	 */
 	public function get_custom_fields_for_term( $term_id ) {
 		$selected_entity_types   = get_term_meta( $term_id, 'wl_entity_type' );
+		if ( ! is_array( $selected_entity_types )) {
+			return null;
+		}
+
 		$selected_entity_types[] = 'thing';
 		$selected_entity_types   = array_unique( $selected_entity_types );
 

src/includes/class-wordlift.php

@@ -1698,7 +1698,9 @@ private function define_admin_hooks( $that ) {
 		 * @since 3.23.0
 		 */
 		add_filter(
-			'allowed_block_types',
+			version_compare( get_bloginfo( 'version' ), '5.8', '>=' )
+				? 'allowed_block_types_all'
+				: 'allowed_block_types',
 			function ( $value ) {
 
 				if ( true === $value ) {