PHP Fatal error: Uncaught TypeError: array_merge(): Argument # must be of type array [Solved]

This article explores the causes and solutions for the PHP Fatal Error message that states "PHP Fatal error: Uncaught TypeError: array_merge(): Argument # must be of type array." Here, we will delve into the origins of this error and offer guidance on how to resolve this PHP fatal error. If you are currently grappling with this issue during your development phase, this article aims to provide you with insights and includes PHP code snippets that both illustrate the error and demonstrate how to avoid or fix it.