PHPのお勉強！

PHP TOP
PHP 8.4.2 Released!

    CachingIterator::offsetSet

    (PHP 5 >= 5.2.0, PHP 7, PHP 8)

    CachingIterator::offsetSet — The offsetSet purpose

    説明

    public CachingIterator::offsetSet(string $key, mixed $value): void
    警告

    この関数は、 現在のところ詳細な情報はありません。引数のリストのみが 記述されています。

    パラメータ

    key

    設定したい要素のインデックス。

    value

    key の新しい値。

    戻り値

    値を返しません。

    Found A Problem?

    Learn How To Improve This Page • Submit a Pull Request • Report a Bug
    ＋add a note

    User Contributed Notes 1 note

    up
    0
    ddrake at dreamingmind dot com
    5 years ago
    offsetSet($index, $newval) will change an existing cache value or create a new cache entry

    <?php
    $cache     = new \CachingIterator(
    new     \ArrayIterator(['a', 'b', 'c', 'd']),
    \CachingIterator::FULL_CACHE);

    $shortRange = range(0, 1);

    foreach (    $shortRange as $index) {
    $cache->next();
    }

    echo     PHP_EOL . 'The cache' . PHP_EOL;
    var_export($cache->getCache());
    echo     PHP_EOL;

    echo     $cache->offsetSet('0', 'manual change') . PHP_EOL;
    echo     $cache->offsetSet('3', 'manual entry') . PHP_EOL;
    ?>

    The cache
    array (
    0 => 'a',
    1 => 'b',
    )

    The cache
    array (
    0 => 'manual change',
    1 => 'b',
    3 => 'manual entry',
    )

    There is no requirement that the offset exist in the inner iterator, or that the offset exists in the cache.

    <?php
    $cache     = new \CachingIterator(
    new     \ArrayIterator([]),
    \CachingIterator::FULL_CACHE);

    echo     $cache->offsetSet('22', 'manual entry') . PHP_EOL;

    echo     PHP_EOL . 'The cache' . PHP_EOL;
    var_export($cache->getCache());
    echo     PHP_EOL;

    print_r("cache offset '22' " .
    (    $cache->offsetExists('22') == 1
    ? 'exists'
    : "doesn't exist"
    ) . PHP_EOL);
    ?>

    The cache
    array (
    22 => 'manual entry',
    )
    cache offset '22' exists
    ＋add a note
    To Top