diff -r 7b1b88e27a20 -r 48c4eec2b7e6 wp/wp-includes/rest-api/endpoints/class-wp-rest-plugins-controller.php
--- a/wp/wp-includes/rest-api/endpoints/class-wp-rest-plugins-controller.php	Thu Sep 29 08:06:27 2022 +0200
+++ b/wp/wp-includes/rest-api/endpoints/class-wp-rest-plugins-controller.php	Fri Sep 05 18:40:08 2025 +0200
@@ -298,7 +298,7 @@
 		);
 
 		if ( is_wp_error( $api ) ) {
-			if ( false !== strpos( $api->get_error_message(), 'Plugin not found.' ) ) {
+			if ( str_contains( $api->get_error_message(), 'Plugin not found.' ) ) {
 				$api->add_data( array( 'status' => 404 ) );
 			} else {
 				$api->add_data( array( 'status' => 500 ) );
@@ -381,7 +381,7 @@
 		$installed_locales = apply_filters( 'plugins_update_check_locales', $installed_locales );
 
 		$language_packs = array_map(
-			static function( $item ) {
+			static function ( $item ) {
 				return (object) $item;
 			},
 			$api->language_packs
@@ -389,7 +389,7 @@
 
 		$language_packs = array_filter(
 			$language_packs,
-			static function( $pack ) use ( $installed_locales ) {
+			static function ( $pack ) use ( $installed_locales ) {
 				return in_array( $pack->language, $installed_locales, true );
 			}
 		);
@@ -571,11 +571,13 @@
 	 *
 	 * @since 5.5.0
 	 *
-	 * @param mixed           $item    Unmarked up and untranslated plugin data from {@see get_plugin_data()}.
+	 * @param array           $item    Unmarked up and untranslated plugin data from {@see get_plugin_data()}.
 	 * @param WP_REST_Request $request Request object.
 	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
 	 */
 	public function prepare_item_for_response( $item, $request ) {
+		$fields = $this->get_fields_for_response( $request );
+
 		$item   = _get_plugin_data_markup_translate( $item['_file'], $item, false );
 		$marked = _get_plugin_data_markup_translate( $item['_file'], $item, true );
 
@@ -600,7 +602,10 @@
 		$data = $this->add_additional_fields_to_object( $data, $request );
 
 		$response = new WP_REST_Response( $data );
-		$response->add_links( $this->prepare_links( $item ) );
+
+		if ( rest_is_field_included( '_links', $fields ) || rest_is_field_included( '_embedded', $fields ) ) {
+			$response->add_links( $this->prepare_links( $item ) );
+		}
 
 		/**
 		 * Filters plugin data for a REST API response.
@@ -625,7 +630,14 @@
 	protected function prepare_links( $item ) {
 		return array(
 			'self' => array(
-				'href' => rest_url( sprintf( '%s/%s/%s', $this->namespace, $this->rest_base, substr( $item['_file'], 0, - 4 ) ) ),
+				'href' => rest_url(
+					sprintf(
+						'%s/%s/%s',
+						$this->namespace,
+						$this->rest_base,
+						substr( $item['_file'], 0, - 4 )
+					)
+				),
 			),
 		);
 	}
@@ -797,7 +809,7 @@
 			$matched_search = false;
 
 			foreach ( $item as $field ) {
-				if ( is_string( $field ) && false !== strpos( strip_tags( $field ), $search ) ) {
+				if ( is_string( $field ) && str_contains( strip_tags( $field ), $search ) ) {
 					$matched_search = true;
 					break;
 				}