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<?php function getUTF8CharCode($c) { $h = ord($c{0}); if ($h <= 0x7F) { return $h; } else if ($h < 0xC2) { return false; } else if ($h <= 0xDF) { return ($h & 0x1F) << 6 | (ord($c{1}) & 0x3F); } else if ($h <= 0xEF) { return ($h & 0x0F) << 12 | (ord($c{1}) & 0x3F) << 6 | (ord($c{2}) & 0x3F); } else if ($h <= 0xF4) { return ($h & 0x0F) << 18 | (ord($c{1}) & 0x3F) << 12 | (ord($c{2}) & 0x3F) << 6 | (ord($c{3}) & 0x3F); } else { return false; } } function escapeCSSCharacter($c) { return "\\" . base_convert(getUTF8CharCode($c), 10, 16) . " "; } function escapeCSSRule($data, array $immuneChars = array()) { $result = ""; for ($i = 0; $i < mb_strlen($data); $i++) { $currChar = mb_substr($data, $i, 1); if (getUTF8CharCode($currChar) > 256 && !preg_match("/^\w$/", $currChar) && !in_array($currChar, $immuneChars)) { var_dump(getUTF8CharCode($currChar), preg_match("/^\w$/", $currChar)); $result .= escapeCSSCharacter($currChar); } else { $result .= $currChar; } } return $result; } echo escapeCSSRule("#BADA55");

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