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CharsetUtils.php
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CharsetUtils.php
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<?php
namespace ArturDoruch\StringUtil;
/**
* Character sets utilities.
*
* @author Artur Doruch <arturdoruch@interia.pl>
*/
class CharsetUtils
{
/**
* Checks whether a string has UTF-8 encoding type.
*
* @param string $string
*
* @return bool
*/
public static function isUtf8(string $string): bool
{
return preg_match('//u', $string); //(bool) mb_detect_encoding($string, 'UTF-8', $strict = true);
}
/**
* Removes characters not available in the UTF-8 encoding type.
* Code taken from https://webcollab.sourceforge.io/unicode.html
*
* @param string $string
*
* @return string
*/
public static function cleanupUtf8(string $string): string
{
return preg_replace(
'/[\x00-\x08\x10\x0B\x0C\x0E-\x19\x7F]'.
'|[\x00-\x7F][\x80-\xBF]+'.
'|([\xC0\xC1]|[\xF0-\xFF])[\x80-\xBF]*'.
'|[\xC2-\xDF]((?![\x80-\xBF])|[\x80-\xBF]{2,})'.
'|[\xE0-\xEF](([\x80-\xBF](?![\x80-\xBF]))|(?![\x80-\xBF]{2})|[\x80-\xBF]{3,})/S',
'', $string);
}
/**
* Decodes hexadecimal code points of the UTF-8 charset escaped with "\u", like "\uXXXX".
* The code points of the characters not available in the UTF-8 charset are removed.
* Code taken from https://stackoverflow.com/a/2934602
*
* @param string $string
* @param string $encoding Encoding type of the $string. E.g: UTF-16BE.
*
* @return string
*/
public static function decodeHexCodePoints(string $string, string $encoding = 'UCS-2BE'): string
{
return preg_replace_callback('/\\\u([0-9a-fA-F]{4,6})/', function ($matches) use ($encoding) {
if (strlen($matches[1]) > 4) {
return '';
}
return mb_convert_encoding(pack('H*', $matches[1]), 'UTF-8', $encoding);
}, $string);
}
/**
* @param string $string
*
* @return string
*/
public static function decodeNonBreakingSpaces($string): string
{
$string = str_replace(' ', ' ', $string);
if (null === $str = preg_replace('/\x{00A0}/u', ' ', $string)) {
return $string;
}
return $str;
}
/**
* Removes accents (diacritic marks) from a string, by converting them to their
* corresponding non-accented ASCII characters.
*
* @param string $string
*
* @return string
*/
public static function removeAccents(string $string): string
{
return strtr($string, self::ACCENTED_CHARACTERS);
}
const ACCENTED_CHARACTERS = [
'À' => 'A',
'Á' => 'A',
'Â' => 'A',
'Ã' => 'A',
'Ä' => 'Ae',
'Æ' => 'Ae',
'Å' => 'Aa',
'æ' => 'a',
'Ç' => 'C',
'È' => 'E',
'É' => 'E',
'Ê' => 'E',
'Ë' => 'E',
'Ì' => 'I',
'Í' => 'I',
'Î' => 'I',
'Ï' => 'I',
'Ñ' => 'N',
'Ò' => 'O',
'Ó' => 'O',
'Ô' => 'O',
'Õ' => 'O',
'Ö' => 'Oe',
'Ù' => 'U',
'Ú' => 'U',
'Û' => 'U',
'Ü' => 'Ue',
'Ý' => 'Y',
'ß' => 'ss',
'à' => 'a',
'á' => 'a',
'â' => 'a',
'ã' => 'a',
'ä' => 'ae',
'å' => 'aa',
'ç' => 'c',
'è' => 'e',
'é' => 'e',
'ê' => 'e',
'ë' => 'e',
'ì' => 'i',
'í' => 'i',
'î' => 'i',
'ï' => 'i',
'ñ' => 'n',
'ò' => 'o',
'ó' => 'o',
'ô' => 'o',
'õ' => 'o',
'ö' => 'oe',
'ù' => 'u',
'ú' => 'u',
'û' => 'u',
'ü' => 'ue',
'ý' => 'y',
'ÿ' => 'y',
'Ā' => 'A',
'ā' => 'a',
'Ă' => 'A',
'ă' => 'a',
'Ą' => 'A',
'ą' => 'a',
'Ć' => 'C',
'ć' => 'c',
'Ĉ' => 'C',
'ĉ' => 'c',
'Ċ' => 'C',
'ċ' => 'c',
'Č' => 'C',
'č' => 'c',
'Ď' => 'D',
'ď' => 'd',
'Đ' => 'D',
'đ' => 'd',
'Ē' => 'E',
'ē' => 'e',
'Ĕ' => 'E',
'ĕ' => 'e',
'Ė' => 'E',
'ė' => 'e',
'Ę' => 'E',
'ę' => 'e',
'Ě' => 'E',
'ě' => 'e',
'Ĝ' => 'G',
'ĝ' => 'g',
'Ğ' => 'G',
'ğ' => 'g',
'Ġ' => 'G',
'ġ' => 'g',
'Ģ' => 'G',
'ģ' => 'g',
'Ĥ' => 'H',
'ĥ' => 'h',
'Ħ' => 'H',
'ħ' => 'h',
'Ĩ' => 'I',
'ĩ' => 'i',
'Ī' => 'I',
'ī' => 'i',
'Ĭ' => 'I',
'ĭ' => 'i',
'Į' => 'I',
'į' => 'i',
'İ' => 'I',
'ı' => 'i',
'IJ' => 'IJ',
'ij' => 'ij',
'Ĵ' => 'J',
'ĵ' => 'j',
'Ķ' => 'K',
'ķ' => 'k',
'ĸ' => 'k',
'Ĺ' => 'L',
'ĺ' => 'l',
'Ļ' => 'L',
'ļ' => 'l',
'Ľ' => 'L',
'ľ' => 'l',
'Ŀ' => 'L',
'ŀ' => 'l',
'Ł' => 'L',
'ł' => 'l',
'Ń' => 'N',
'ń' => 'n',
'Ņ' => 'N',
'ņ' => 'n',
'Ň' => 'N',
'ň' => 'n',
'ʼn' => 'N',
'Ŋ' => 'n',
'ŋ' => 'N',
'Ō' => 'O',
'ō' => 'o',
'Ŏ' => 'O',
'ŏ' => 'o',
'Ő' => 'O',
'ő' => 'o',
'Œ' => 'OE',
'œ' => 'oe',
'Ø' => 'O',
'ø' => 'o',
'Ŕ' => 'R',
'ŕ' => 'r',
'Ŗ' => 'R',
'ŗ' => 'r',
'Ř' => 'R',
'ř' => 'r',
'Ś' => 'S',
'ś' => 's',
'Ŝ' => 'S',
'ŝ' => 's',
'Ş' => 'S',
'ş' => 's',
'Š' => 'S',
'š' => 's',
'Ţ' => 'T',
'ţ' => 't',
'Ť' => 'T',
'ť' => 't',
'Ŧ' => 'T',
'ŧ' => 't',
'Ũ' => 'U',
'ũ' => 'u',
'Ū' => 'U',
'ū' => 'u',
'Ŭ' => 'U',
'ŭ' => 'u',
'Ů' => 'U',
'ů' => 'u',
'Ű' => 'U',
'ű' => 'u',
'Ų' => 'U',
'ų' => 'u',
'Ŵ' => 'W',
'ŵ' => 'w',
'Ŷ' => 'Y',
'ŷ' => 'y',
'Ÿ' => 'Y',
'Ź' => 'Z',
'ź' => 'z',
'Ż' => 'Z',
'ż' => 'z',
'Ž' => 'Z',
'ž' => 'z',
'ſ' => 's',
];
}