PHP Determine Line Breaks

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To see whitespace characters in php, use the following function:

function raw($str) {     $str = str_replace(array("\t", "\r\n", "\r", "\n"),                      array('\t', '\r\n', '\r', '\n'), $str); } // line endings are replaced with literal characters $str = str_replace("\t", '\t', $str); $str = str_replace("\r\n", '\r\n', $str); $str = str_replace("\n", '\n', $str); $str = str_replace("\r", '\r', $str); echo $s;   // combined $str = str_replace(array("\t", "\r\n", "\r", "\n"),                  array('\t', '\r\n', '\r', '\n'), $str); echo $s;