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Filename : bootstrap.php
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<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

use Symfony\Polyfill\Intl\Idn as p;

if (extension_loaded('intl')) {
    return;
}

if (\PHP_VERSION_ID >= 80000) {
    return require __DIR__.'/bootstrap80.php';
}

if (!defined('U_IDNA_PROHIBITED_ERROR')) {
    define('U_IDNA_PROHIBITED_ERROR', 66560);
}
if (!defined('U_IDNA_ERROR_START')) {
    define('U_IDNA_ERROR_START', 66560);
}
if (!defined('U_IDNA_UNASSIGNED_ERROR')) {
    define('U_IDNA_UNASSIGNED_ERROR', 66561);
}
if (!defined('U_IDNA_CHECK_BIDI_ERROR')) {
    define('U_IDNA_CHECK_BIDI_ERROR', 66562);
}
if (!defined('U_IDNA_STD3_ASCII_RULES_ERROR')) {
    define('U_IDNA_STD3_ASCII_RULES_ERROR', 66563);
}
if (!defined('U_IDNA_ACE_PREFIX_ERROR')) {
    define('U_IDNA_ACE_PREFIX_ERROR', 66564);
}
if (!defined('U_IDNA_VERIFICATION_ERROR')) {
    define('U_IDNA_VERIFICATION_ERROR', 66565);
}
if (!defined('U_IDNA_LABEL_TOO_LONG_ERROR')) {
    define('U_IDNA_LABEL_TOO_LONG_ERROR', 66566);
}
if (!defined('U_IDNA_ZERO_LENGTH_LABEL_ERROR')) {
    define('U_IDNA_ZERO_LENGTH_LABEL_ERROR', 66567);
}
if (!defined('U_IDNA_DOMAIN_NAME_TOO_LONG_ERROR')) {
    define('U_IDNA_DOMAIN_NAME_TOO_LONG_ERROR', 66568);
}
if (!defined('U_IDNA_ERROR_LIMIT')) {
    define('U_IDNA_ERROR_LIMIT', 66569);
}
if (!defined('U_STRINGPREP_PROHIBITED_ERROR')) {
    define('U_STRINGPREP_PROHIBITED_ERROR', 66560);
}
if (!defined('U_STRINGPREP_UNASSIGNED_ERROR')) {
    define('U_STRINGPREP_UNASSIGNED_ERROR', 66561);
}
if (!defined('U_STRINGPREP_CHECK_BIDI_ERROR')) {
    define('U_STRINGPREP_CHECK_BIDI_ERROR', 66562);
}
if (!defined('IDNA_DEFAULT')) {
    define('IDNA_DEFAULT', 0);
}
if (!defined('IDNA_ALLOW_UNASSIGNED')) {
    define('IDNA_ALLOW_UNASSIGNED', 1);
}
if (!defined('IDNA_USE_STD3_RULES')) {
    define('IDNA_USE_STD3_RULES', 2);
}
if (!defined('IDNA_CHECK_BIDI')) {
    define('IDNA_CHECK_BIDI', 4);
}
if (!defined('IDNA_CHECK_CONTEXTJ')) {
    define('IDNA_CHECK_CONTEXTJ', 8);
}
if (!defined('IDNA_NONTRANSITIONAL_TO_ASCII')) {
    define('IDNA_NONTRANSITIONAL_TO_ASCII', 16);
}
if (!defined('IDNA_NONTRANSITIONAL_TO_UNICODE')) {
    define('IDNA_NONTRANSITIONAL_TO_UNICODE', 32);
}
if (!defined('INTL_IDNA_VARIANT_2003')) {
    define('INTL_IDNA_VARIANT_2003', 0);
}
if (!defined('INTL_IDNA_VARIANT_UTS46')) {
    define('INTL_IDNA_VARIANT_UTS46', 1);
}
if (!defined('IDNA_ERROR_EMPTY_LABEL')) {
    define('IDNA_ERROR_EMPTY_LABEL', 1);
}
if (!defined('IDNA_ERROR_LABEL_TOO_LONG')) {
    define('IDNA_ERROR_LABEL_TOO_LONG', 2);
}
if (!defined('IDNA_ERROR_DOMAIN_NAME_TOO_LONG')) {
    define('IDNA_ERROR_DOMAIN_NAME_TOO_LONG', 4);
}
if (!defined('IDNA_ERROR_LEADING_HYPHEN')) {
    define('IDNA_ERROR_LEADING_HYPHEN', 8);
}
if (!defined('IDNA_ERROR_TRAILING_HYPHEN')) {
    define('IDNA_ERROR_TRAILING_HYPHEN', 16);
}
if (!defined('IDNA_ERROR_HYPHEN_3_4')) {
    define('IDNA_ERROR_HYPHEN_3_4', 32);
}
if (!defined('IDNA_ERROR_LEADING_COMBINING_MARK')) {
    define('IDNA_ERROR_LEADING_COMBINING_MARK', 64);
}
if (!defined('IDNA_ERROR_DISALLOWED')) {
    define('IDNA_ERROR_DISALLOWED', 128);
}
if (!defined('IDNA_ERROR_PUNYCODE')) {
    define('IDNA_ERROR_PUNYCODE', 256);
}
if (!defined('IDNA_ERROR_LABEL_HAS_DOT')) {
    define('IDNA_ERROR_LABEL_HAS_DOT', 512);
}
if (!defined('IDNA_ERROR_INVALID_ACE_LABEL')) {
    define('IDNA_ERROR_INVALID_ACE_LABEL', 1024);
}
if (!defined('IDNA_ERROR_BIDI')) {
    define('IDNA_ERROR_BIDI', 2048);
}
if (!defined('IDNA_ERROR_CONTEXTJ')) {
    define('IDNA_ERROR_CONTEXTJ', 4096);
}

if (\PHP_VERSION_ID < 70400) {
    if (!function_exists('idn_to_ascii')) {
        function idn_to_ascii($domain, $flags = 0, $variant = \INTL_IDNA_VARIANT_2003, &$idna_info = null) { return p\Idn::idn_to_ascii($domain, $flags, $variant, $idna_info); }
    }
    if (!function_exists('idn_to_utf8')) {
        function idn_to_utf8($domain, $flags = 0, $variant = \INTL_IDNA_VARIANT_2003, &$idna_info = null) { return p\Idn::idn_to_utf8($domain, $flags, $variant, $idna_info); }
    }
} else {
    if (!function_exists('idn_to_ascii')) {
        function idn_to_ascii($domain, $flags = 0, $variant = \INTL_IDNA_VARIANT_UTS46, &$idna_info = null) { return p\Idn::idn_to_ascii($domain, $flags, $variant, $idna_info); }
    }
    if (!function_exists('idn_to_utf8')) {
        function idn_to_utf8($domain, $flags = 0, $variant = \INTL_IDNA_VARIANT_UTS46, &$idna_info = null) { return p\Idn::idn_to_utf8($domain, $flags, $variant, $idna_info); }
    }
}