Fix phpcs errors

common/php/class-module.php

@@ -296,19 +296,24 @@ function update_user_meta( $user_id, $key, $value, $previous = null ) {
 
 	}
 
-	/**
-	 * Take a status and a message, JSON encode and print
-	 *
-	 * @since 0.7
-	 *
-	 * @param string $status Whether it was a 'success' or an 'error'
-	 */
-	function print_ajax_response( $status, $message = '', $http_code = 200 ) {
-		header( 'Content-type: application/json;' );
-		http_response_code( $http_code );
-		echo json_encode( array( 'status' => $status, 'message' => $message ) );
-		exit;
-	}
+		/**
+		 * Take a status and a message, JSON encode and print
+		 *
+		 * @since 0.7
+		 *
+		 * @param string $status Whether it was a 'success' or an 'error'
+		 */
+		protected function print_ajax_response( $status, $message = '', $http_code = 200 ) {
+			header( 'Content-type: application/json;' );
+			http_response_code( $http_code );
+			echo wp_json_encode(
+				array(
+					'status'  => $status,
+					'message' => $message,
+				)
+			);
+			exit;
+		}
 
 	/**
 	 * Whether or not the current page is a user-facing Edit Flow View