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CachingIterator::offsetGet

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

CachingIterator::offsetGet — The offsetGet purpose

説明

public CachingIterator::offsetGet(string $key): mixed

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: Description...

戻り値

Description...

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User Contributed Notes 1 note

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ddrake at dreamingmind dot com ¶

5 years ago


offsetGet($index) returns the value stored at $index in the cache. Until you've 
iterated over the items, the cache is empty and the index will not exist.

 <?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->offsetGet('1') . PHP_EOL;
        echo $cache->offsetGet('2') . PHP_EOL;
?>

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

b
Undefined index: 2

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