function PhpTransliteration::removeDiacritics

Overrides TransliterationInterface::removeDiacritics

File

core/lib/Drupal/Component/Transliteration/PhpTransliteration.php, line 93

Class

PhpTransliteration

Implements transliteration without using the PECL extensions.

Namespace

Code

public function removeDiacritics($string) {
    $result = '';
    foreach (preg_split('//u', $string, 0, PREG_SPLIT_NO_EMPTY) as $character) {
        $code = self::ordUTF8($character);
        // These two Unicode ranges include the accented US-ASCII letters, with a
        // few characters that aren't accented letters mixed in. So define the
        // ranges and the excluded characters.
        $range1 = $code > 0xbf && $code < 0x17f;
        $exclusions_range1 = [
            0xd0,
            0xd7,
            0xf0,
            0xf7,
            0x138,
            0x14a,
            0x14b,
        ];
        $range2 = $code > 0x1cc && $code < 0x250;
        $exclusions_range2 = [
            0x1dd,
            0x1f7,
            0x21c,
            0x21d,
            0x220,
            0x221,
            0x241,
            0x242,
            0x245,
        ];
        $replacement = $character;
        if ($range1 && !in_array($code, $exclusions_range1) || $range2 && !in_array($code, $exclusions_range2)) {
            $to_add = $this->lookupReplacement($code, 'xyz');
            if (strlen($to_add) === 1) {
                $replacement = $to_add;
            }
            elseif (isset($this->fixTransliterateForRemoveDiacritics[$to_add])) {
                $replacement = $this->fixTransliterateForRemoveDiacritics[$to_add];
            }
        }
        $result .= $replacement;
    }
    return $result;
}