How can one handle line breaks in PHP code effectively?

When handling line breaks in PHP code, it's important to use the correct line break characters based on the operating system you are working on. For Windows, the line break character is "\r\n", for Unix-based systems like Linux and macOS, it is "\n". To handle line breaks effectively, you can use the PHP predefined constant PHP_EOL which represents the correct line break character based on the operating system.

// Example of handling line breaks using PHP_EOL constant
$message = "Hello" . PHP_EOL . "World";
echo $message;