What are the common pitfalls when deploying PHP applications on different server environments, such as Linux versus Windows?

One common pitfall when deploying PHP applications on different server environments is the inconsistency in file paths between Linux and Windows systems. To solve this issue, it is recommended to use PHP's built-in DIRECTORY_SEPARATOR constant when defining file paths in your code. This constant automatically adjusts the file paths based on the server's operating system.

// Define file path using DIRECTORY_SEPARATOR constant
$file_path = 'path' . DIRECTORY_SEPARATOR . 'to' . DIRECTORY_SEPARATOR . 'file.php';