[String] improve AbstractUnicodeString::ascii() fallback logic
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@ -73,18 +73,21 @@ abstract class AbstractUnicodeString extends AbstractString
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*
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* Install the intl extension for best results.
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*
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* @param string[] $rules See "*-Latin" rules from Transliterator::listIDs()
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* @param string[]|\Transliterator[] $rules See "*-Latin" rules from Transliterator::listIDs()
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*/
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public function ascii(array $rules = []): self
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{
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$str = clone $this;
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$s = $str->string;
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$str->string = '';
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$step = 0;
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$rules[] = 'nfkd';
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$rules[] = '[:nonspacing mark:] remove';
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if (\function_exists('transliterator_transliterate')) {
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$rules[] = 'any-latin/bgn';
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$rules[] = 'nfkd';
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$rules[] = '[:nonspacing mark:] remove';
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$rules[] = 'any-latin';
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}
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while (\strlen($s) !== $i = strspn($s, self::ASCII)) {
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@ -93,32 +96,48 @@ abstract class AbstractUnicodeString extends AbstractString
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$s = substr($s, $i);
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}
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if (1 === ++$step) {
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if ($rules && !$rule = array_shift($rules)) {
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$rules = []; // An empty rule interrupts the next ones
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}
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if ($rules && $rule) {
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if ($rule instanceof \Transliterator) {
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$s = $rule->transliterate($s);
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continue;
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}
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if ('nfkd' === $rule = strtolower($rule)) {
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if (!normalizer_is_normalized($s, self::NFKD)) {
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$s = normalizer_normalize($s, self::NFKD);
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}
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} elseif (2 === $step) {
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$s = str_replace(self::TRANSLIT_FROM, self::TRANSLIT_TO, $s);
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} elseif (3 === $step && '' !== $rule = strtolower(array_shift($rules))) {
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$step = 2;
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if ('[:nonspacing mark:] remove' === $rule) {
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} elseif ('[:nonspacing mark:] remove' === $rule) {
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$s = preg_replace('/\p{Mn}++/u', '', $s);
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} elseif ('de-ascii' === $rule) {
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$s = preg_replace("/([AUO])\u{0308}(?=\p{Ll})/u", '$1e', $s);
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$s = str_replace(["a\u{0308}", "o\u{0308}", "u\u{0308}", "A\u{0308}", "O\u{0308}", "U\u{0308}"], ['ae', 'oe', 'ue', 'AE', 'OE', 'UE'], $s);
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} elseif (\function_exists('transliterator_transliterate')) {
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if (null === $transliterator = self::$transliterators[$rule] ?? self::$transliterators[$rule] = \Transliterator::create($rule)) {
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if ('any-latin/bgn' === $rule) {
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$rule = 'any-latin';
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$transliterator = self::$transliterators[$rule] ?? self::$transliterators[$rule] = \Transliterator::create($rule);
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}
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if (null === $transliterator) {
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throw new InvalidArgumentException(sprintf('Unknown transliteration rule "%s".', $rule));
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}
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self::$transliterators['any-latin/bgn'] = $transliterator;
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}
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$s = $transliterator->transliterate($s);
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}
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} elseif (!\function_exists('iconv')) {
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$s = str_replace(self::TRANSLIT_FROM, self::TRANSLIT_TO, $s);
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$s = preg_replace('/[^\x00-\x7F]/u', '?', $s);
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} elseif (\ICONV_IMPL === 'glibc') {
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$s = iconv('UTF-8', 'ASCII//TRANSLIT', $s);
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} else {
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$s = str_replace(self::TRANSLIT_FROM, self::TRANSLIT_TO, $s);
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$s = preg_replace_callback('/[^\x00-\x7F]/u', static function ($c) {
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$c = iconv('UTF-8', 'ASCII//IGNORE//TRANSLIT', $c[0]);
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