32 lines
927 B
PHP
32 lines
927 B
PHP
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<?php
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declare(strict_types=1);
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/** North American Numbering Plan normalization to E.164 (+1NXXNXXXXXX). */
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final class Phone
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{
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public static function normalizeNanp(string $input): ?string
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{
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$digits = preg_replace('/\D+/', '', $input) ?? '';
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if (strlen($digits) === 11 && $digits[0] === '1') {
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$digits = substr($digits, 1);
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}
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if (strlen($digits) !== 10) {
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return null;
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}
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$area = substr($digits, 0, 3);
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$exchange = substr($digits, 3, 3);
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if (in_array($area[0], ['0', '1'], true) || in_array($exchange[0], ['0', '1'], true)) {
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return null;
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}
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if ($area[1] === '1' && $area[2] === '1') {
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return null; // N11 service codes
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}
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return '+1' . $digits;
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}
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public static function isE164(string $v): bool
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{
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return (bool)preg_match('/^\+[1-9]\d{6,14}$/', $v);
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}
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}
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