Regex/ code to fix corrupt serialized PHP data.

Question

I have a massive multidimensional array that has been serialised by PHP. It has been stored in MySQL and the data field wasn\'t large enough... the end has been cut off... I

Answer 1

[UPD] Colleagues, I'm not very sure if it is allowed here, but specially for similar cases I've created own tool and 've placed it on own website. Please, try it https://saysimsim.ru/tools/SerializedDataEditor

[Old text] Conclusion :-) After 3 days (instead of 2 estimated hours) migrating blessed WordPress website to a new domain name, I've finally found this page!!! Colleagues, please, consider it as my "Thank_You_Very_Much_Indeed" to all your answers. The code below consists of all your solutions with almost no additions. JFYI: personally for me the most often SOLUTION 3 works. Kamal Saleh - you are the best!!!

function hlpSuperUnSerialize($str) {
    #region Simple Security
    if (
        empty($str)
        || !is_string($str)
        || !preg_match('/^[aOs]:/', $str)
    ) {
        return FALSE;
    }
    #endregion Simple Security

    #region SOLUTION 0
    // PHP default :-)
    $repSolNum = 0;
    $strFixed  = $str;
    $arr       = @unserialize($strFixed);
    if (FALSE !== $arr) {
        error_log("UNSERIALIZED!!! SOLUTION {$repSolNum} worked!!!");

        return $arr;
    }
    #endregion SOLUTION 0

    #region SOLUTION 1
    // @link https://stackoverflow.com/a/5581004/3142281
    $repSolNum = 1;
    $strFixed  = preg_replace_callback(
        '/s:([0-9]+):\"(.*?)\";/',
        function ($matches) { return "s:" . strlen($matches[2]) . ':"' . $matches[2] . '";'; },
        $str
    );
    $arr       = @unserialize($strFixed);
    if (FALSE !== $arr) {
        error_log("UNSERIALIZED!!! SOLUTION {$repSolNum} worked!!!");

        return $arr;
    }
    #endregion SOLUTION 1

    #region SOLUTION 2
    // @link https://stackoverflow.com/a/24995701/3142281
    $repSolNum = 2;
    $strFixed  = preg_replace_callback(
        '/s:([0-9]+):\"(.*?)\";/',
        function ($match) {
            return "s:" . strlen($match[2]) . ':"' . $match[2] . '";';
        },
        $str);
    $arr       = @unserialize($strFixed);
    if (FALSE !== $arr) {
        error_log("UNSERIALIZED!!! SOLUTION {$repSolNum} worked!!!");

        return $arr;
    }
    #endregion SOLUTION 2

    #region SOLUTION 3
    // @link https://stackoverflow.com/a/34224433/3142281
    $repSolNum = 3;
    // securities
    $strFixed = preg_replace("%\n%", "", $str);
    // doublequote exploding
    $data     = preg_replace('%";%', "µµµ", $strFixed);
    $tab      = explode("µµµ", $data);
    $new_data = '';
    foreach ($tab as $line) {
        $new_data .= preg_replace_callback(
            '%\bs:(\d+):"(.*)%',
            function ($matches) {
                $string       = $matches[2];
                $right_length = strlen($string); // yes, strlen even for UTF-8 characters, PHP wants the mem size, not the char count

                return 's:' . $right_length . ':"' . $string . '";';
            },
            $line);
    }
    $strFixed = $new_data;
    $arr      = @unserialize($strFixed);
    if (FALSE !== $arr) {
        error_log("UNSERIALIZED!!! SOLUTION {$repSolNum} worked!!!");

        return $arr;
    }
    #endregion SOLUTION 3

    #region SOLUTION 4
    // @link https://stackoverflow.com/a/36454402/3142281
    $repSolNum = 4;
    $strFixed  = preg_replace_callback(
        '/s:([0-9]+):"(.*?)";/',
        function ($match) {
            return "s:" . strlen($match[2]) . ":\"" . $match[2] . "\";";
        },
        $str
    );
    $arr       = @unserialize($strFixed);
    if (FALSE !== $arr) {
        error_log("UNSERIALIZED!!! SOLUTION {$repSolNum} worked!!!");

        return $arr;
    }
    #endregion SOLUTION 4

    #region SOLUTION 5
    // @link https://stackoverflow.com/a/38890855/3142281
    $repSolNum = 5;
    $strFixed  = preg_replace_callback('/s\:(\d+)\:\"(.*?)\";/s', function ($matches) { return 's:' . strlen($matches[2]) . ':"' . $matches[2] . '";'; }, $str);
    $arr       = @unserialize($strFixed);
    if (FALSE !== $arr) {
        error_log("UNSERIALIZED!!! SOLUTION {$repSolNum} worked!!!");

        return $arr;
    }
    #endregion SOLUTION 5

    #region SOLUTION 6
    // @link https://stackoverflow.com/a/38891026/3142281
    $repSolNum = 6;
    $strFixed  = preg_replace_callback(
        '/s\:(\d+)\:\"(.*?)\";/s',
        function ($matches) { return 's:' . strlen($matches[2]) . ':"' . $matches[2] . '";'; },
        $str);;
    $arr = @unserialize($strFixed);
    if (FALSE !== $arr) {
        error_log("UNSERIALIZED!!! SOLUTION {$repSolNum} worked!!!");

        return $arr;
    }
    #endregion SOLUTION 6
    error_log('Completely unable to deserialize.');

    return FALSE;
}