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run code in 300+ PHP versions simultaneously

@ 2017-03-31T10:09:40Z

<?php

    function format($src, $format = '+d (ddd) ddd-dd-dd') {
        $digits = preg_replace('/\D/', '', $src); // Оставляем только цифры
        $res = '';
        for($i = 0; $i < strlen($format); $i++) {
            $letter = $format[$i];
            if (!$digits) { // Не хватило цифр
                $res .= $letter;
                continue;
            }
            switch ($letter) {
                case 'd':  // Цифра
                    $res .= $digits[0];
                    $digits = substr($digits, 1);
                    break;
                default: $res .= $letter;
            }
        }
        return $res;
    }
    
    $data = [
      '+7(999)999-99-99',
      '79998887766',
      '799988877', // недостаточно цифр для формата
    ];
    
    foreach ($data as $phoneSrc) {
        echo format($phoneSrc)."\n";
    }

Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.7, 7.2.29 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: +7 (999) 999-99-99 +7 (999) 888-77-66 +7 (999) 888-77-dd
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 +7 (999) 999-99-99 +7 (999) 888-77-66 +7 (999) 888-77-dd

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167.48 ms | 402 KiB | 165 Q