In what scenarios would using chr(13) as a delimiter for explode in PHP be considered a suitable solution, and what are the drawbacks of this approach?

Using chr(13) as a delimiter for explode in PHP can be suitable when dealing with data that is formatted with carriage return characters (e.g. text files created on Windows systems). This approach allows you to split the data into an array based on the carriage return character. However, a drawback of this approach is that it may not work as expected on data that contains different types of line endings (e.g. a mix of carriage return and line feed characters).

$data = "Line 1" . chr(13) . "Line 2" . chr(13) . "Line 3";
$array = explode(chr(13), $data);

print_r($array);