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    ZipArchive::statIndex

    (PHP 5 >= 5.2.0, PHP 7, PHP 8, PECL zip >= 1.1.0)

    ZipArchive::statIndex — Получение детальной информации о элементе по его индексу

    Описание

    public ZipArchive::statIndex(int $index, int $flags = 0): array|false

    Получение детальной информации об элементе по его индексу.

    Список параметров

    index

    Индекс элемента.

    flags

    ZipArchive::FL_UNCHANGED указывается, чтобы запросить информацию об исходном файле в архиве, игнорируя любые внесённые изменения.

    Возвращаемые значения

    Возвращает массив, содержащий детальную информацию о элементе или false в случае возникновения ошибки.

    Примеры

    Пример #1 Получение статистической информации о элементе

    <?php
    $zip     = new ZipArchive;
    $res = $zip->open('test.zip');
    if (    $res === TRUE) {
    print_r($zip->statIndex(3));
    $zip->close();
    } else {
    echo     'Ошибка с кодом:' . $res;
    }
    ?>

    Вывод приведённого примера будет похож на: 

    Array
(
    [name] => foobar/baz
    [index] => 3
    [crc] => 499465816
    [size] => 27
    [mtime] => 1123164748
    [comp_size] => 24
    [comp_method] => 8
)
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    User Contributed Notes 3 notes

    up
    11
    eion at robbmob dot com
    8 years ago
    Note that the 'mtime' field only comes from the DOS-format time that's stored in the zip file, which is only accurate to the nearest 2-seconds.  Zip files can store mtime's in multiple, optional fields but PHP's zip library does not retrieve them (nor does it provide API to access the extra fields)

    The end result is that you will see timestamps that could be out by one second (if the original timestamp was odd), and won't necessarily match was other unzip programs will show the mtime as.
    up
    0
    Chris Lewis
    13 years ago
    Note that the signed-integer CRC result is only true on 32-bit systems. 64-bit systems return correct CRCs.

    A safer way (as recommended by crc32() function page) might be:

    if ($file['crc'] < 0)
       $file['crc'] = sprintf("%u",$file['crc']);
    up
    -4
    Anonymous
    13 years ago
    The CRC returned from this method is a signed number and so can be negative. This isn't how most CRC's are represented and so can cause problems. Another thing to know is that the standerd CRC algorithm used for zip files is CRC32b.

    So to put this together lets say that you wanted to extract the first file from a zip and then compare the original CRC with the CRC for the extracted file this is what you would need to do. (proper error checking is omitted for simplicity).

    <?php
    $zip     = new ZipArchive();

    $zip->open("myZip.zip");

    $stat = $zip->statIndex( 0 );

    $name = $stat['name'];

    $oldCrc = $stat['crc'];

    $zip->extractTo("myPath", $name);

    $newCrc = hexdec(hash_file("crc32b", "myPath/" . $name));

    // Have to test both cases as the unsigned CRC from within the zip might appear negative as a signed int.
    if($newCrc !== $oldCrc && ($oldCrc + 4294967296) !== $newCrc) {
        echo     "The files don't match!";
    }
    ?>
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