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@ 2025-04-05T20:53:37Z

<?php

$usPhone = '800-000-7755';

$regex = <<<'REGEX'
~
 (?:
    \b([1-9]0{2,})\b # 1: hundreds, thousands, etc
    |(\d)\2+         # 2: multiples
    |(0)             # 3: zero
    |([1-9])         # 4: single digit
 )
 -?                  # consume optional delimiter
~x
REGEX;

$f = new NumberFormatter('en', NumberFormatter::SPELLOUT);
$mapping = [
    2 => 'double',
    3 => 'triple',
    4 => 'quadruple',
    5 => 'quintuple',
    6 => 'sextuple',
    7 => 'septuple',
    8 => 'octuple',
    9 => 'nonuple',
    10 => 'decuple',
];

echo ltrim(
         preg_replace_callback(
             $regex,
             fn($m) => ' ' . match (array_key_last($m)) {
                 1, 4 => $f->format((int)$m[0]),
                 2 => $mapping[strlen(rtrim($m[0], '-'))] . " " . ($m[2] ? $f->format((int)$m[2]) : 'oh'),
                 default => 'oh',
             },
             $usPhone
         )
     );

Output for 8.5.1: Fatal error: Uncaught Error: Class "NumberFormatter" not found in /in/226q9:17 Stack trace: #0 {main} thrown in /in/226q9 on line 17
Process exited with code 255.
Output for 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.4.16, 8.5.0: eight hundred triple oh double seven double five
Output for 8.4.15: /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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