Online PHP editor | output for NeqNo

<?php //echo 'PHP_VERSION: ', PHP_VERSION, "\n"; mb_regex_encoding('UTF-8') || exit("mb_regex_encoding('UTF-8') error."); foreach (['0085', '180e'] as $hex) { $utf8 = mb_convert_encoding(pack('N', hexdec($hex)), 'UTF-8', 'UTF-32BE'); echo "U+{$hex}", (mb_ereg_match('\A[\s]\z', $utf8) ? ' match \\s !' : '')."\n"; } foreach (['00ad', '200B'] as $hex) { $utf8 = mb_convert_encoding(pack('N', hexdec($hex)), 'UTF-8', 'UTF-32BE'); echo "U+{$hex}", (mb_ereg_match('\A[[:cntrl:]]\z', $utf8) ? ' match cntrl !' : '')."\n"; }