What role does case sensitivity play in class and file naming conventions when working with PHP on different operating systems?

Case sensitivity in class and file naming conventions is important when working with PHP on different operating systems because some systems, like Windows, are case-insensitive while others, like Linux, are case-sensitive. To ensure portability and consistency across different environments, it is recommended to always use consistent casing in class and file names. This means using the same casing in the class definition, file name, and when referencing the class.

// Example of consistent casing in class and file naming conventions
// File name: MyClass.php
class MyClass {
    public function __construct() {
        echo "Hello from MyClass!";
    }
}

// Using the class
$myClass = new MyClass();