function Idn::idn_to_ascii

Parameters

string $domainName:

int $options:

int $variant:

array $idna_info:

Return value

string|false

See also

https://www.unicode.org/reports/tr46/#ToASCII

File

vendor/symfony/polyfill-intl-idn/Idn.php, line 146

Class

Idn

@internal

Namespace

Symfony\Polyfill\Intl\Idn

Code

public static function idn_to_ascii($domainName, $options = self::IDNA_DEFAULT, $variant = self::INTL_IDNA_VARIANT_UTS46, &$idna_info = []) {
    if (self::INTL_IDNA_VARIANT_2003 === $variant) {
        @trigger_error('idn_to_ascii(): INTL_IDNA_VARIANT_2003 is deprecated', \E_USER_DEPRECATED);
    }
    $options = [
        'CheckHyphens' => true,
        'CheckBidi' => self::INTL_IDNA_VARIANT_2003 === $variant || 0 !== ($options & self::IDNA_CHECK_BIDI),
        'CheckJoiners' => self::INTL_IDNA_VARIANT_UTS46 === $variant && 0 !== ($options & self::IDNA_CHECK_CONTEXTJ),
        'UseSTD3ASCIIRules' => 0 !== ($options & self::IDNA_USE_STD3_RULES),
        'Transitional_Processing' => self::INTL_IDNA_VARIANT_2003 === $variant || 0 === ($options & self::IDNA_NONTRANSITIONAL_TO_ASCII),
        'VerifyDnsLength' => true,
    ];
    $info = new Info();
    $labels = self::process((string) $domainName, $options, $info);
    foreach ($labels as $i => $label) {
        // Only convert labels to punycode that contain non-ASCII code points
        if (1 === preg_match('/[^\\x00-\\x7F]/', $label)) {
            try {
                $label = 'xn--' . self::punycodeEncode($label);
            } catch (\Exception $e) {
                $info->errors |= self::ERROR_PUNYCODE;
            }
            $labels[$i] = $label;
        }
    }
    if ($options['VerifyDnsLength']) {
        self::validateDomainAndLabelLength($labels, $info);
    }
    $idna_info = [
        'result' => implode('.', $labels),
        'isTransitionalDifferent' => $info->transitionalDifferent,
        'errors' => $info->errors,
    ];
    return 0 === $info->errors ? $idna_info['result'] : false;
}