Online PHP editor | refs for s16FF

<?php $str = 'plstrim'; $spaces = [ // The horizontal space characters are: "\u{0009}", // Horizontal tab (HT) "\u{0020}", // Space "\u{00A0}", // Non-break space "\u{1680}", // Ogham space mark "\u{180E}", // Mongolian vowel separator "\u{2000}", // En quad "\u{2001}", // Em quad "\u{2002}", // En space "\u{2003}", // Em space "\u{2004}", // Three-per-em space "\u{2005}", // Four-per-em space "\u{2006}", // Six-per-em space "\u{2007}", // Figure space "\u{2008}", // Punctuation space "\u{2009}", // Thin space "\u{200A}", // Hair space "\u{202F}", // Narrow no-break space "\u{205F}", // Medium mathematical space "\u{3000}", // Ideographic space // The vertical space characters are: "\u{000A}", // Linefeed (LF) "\u{000B}", // Vertical tab (VT) "\u{000C}", // Form feed (FF) "\u{000D}", // Carriage return (CR) "\u{0085}", // Next line (NEL) "\u{2028}", // Line separator "\u{2029}" // Paragraph separator ]; foreach($spaces as $s) { $totrim = $str . $s . $s . $s; $trimmed = preg_replace('~\s+$~us', '\1', $totrim); // right-trimming $sname = str_pad(strtoupper(dechex(IntlChar::ord($s))), 4, '0', STR_PAD_LEFT); var_dump([$sname, $totrim, $trimmed]); }