Are there any best practices for handling file extensions in PHP scripts to ensure compatibility across different servers?

When handling file extensions in PHP scripts, it is important to be mindful of case sensitivity as different servers may interpret file extensions differently. To ensure compatibility across different servers, it is recommended to use strtolower() function to convert file extensions to lowercase before performing any comparisons or operations.

$file_extension = pathinfo($file_path, PATHINFO_EXTENSION);
$file_extension = strtolower($file_extension);

// Now you can use $file_extension for comparisons or operations