What are the potential errors or issues that may arise when trying to add line breaks in PHP files?

When adding line breaks in PHP files, one potential issue that may arise is the use of incorrect line break characters or improper syntax, which can lead to syntax errors or unexpected behavior in the code. To ensure proper line breaks, it is recommended to use the PHP_EOL constant, which represents the correct end-of-line character for the current platform.

// Correct way to add line breaks in PHP files using PHP_EOL constant
echo "Line 1" . PHP_EOL;
echo "Line 2" . PHP_EOL;