Vladimir Bryzgalov
44 lines
1.2 KiB
PHP
44 lines
1.2 KiB
PHP
<?php
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declare(strict_types=1);
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namespace Cf7stg;
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final class DomainFormatter
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{
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public static function humanize(string $input): string
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{
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$input = trim($input);
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if ($input === '') {
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return '';
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}
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// Normalize: strip scheme, userinfo, path, query, fragment
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$host = $input;
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if (preg_match('#^[a-z][a-z0-9+\-.]*://#i', $host)) {
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$parsed = parse_url($host);
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$host = $parsed['host'] ?? $host;
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}
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// Strip any remaining path/query
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$host = preg_replace('~[/?#].*$~', '', $host) ?? $host;
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// Strip leading www.
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$host = preg_replace('/^www\./i', '', $host) ?? $host;
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if ($host === '') {
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return '';
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}
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// Punycode → Unicode per label (.xn-- pieces may appear on only one side)
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if (function_exists('idn_to_utf8') && strpos($host, 'xn--') !== false) {
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$variant = defined('INTL_IDNA_VARIANT_UTS46')
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? INTL_IDNA_VARIANT_UTS46
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: 0;
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$decoded = @idn_to_utf8($host, IDNA_DEFAULT, $variant);
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if (is_string($decoded) && $decoded !== '') {
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return $decoded;
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}
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}
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return $host;
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}
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}
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