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CachingIterator::offsetSet

(PHP 5 >= 5.2.0, PHP 7)

CachingIterator::offsetSet — The offsetSet purpose

설명

public void CachingIterator::offsetSet ( string $index , string $newval )

Warning

이 함수는 현재 문서화 되어있지 않습니다; 인수 목록만을 제공합니다.

인수

index: The index of the element to be set.
newval: The new value for the index.

반환값

값을 반환하지 않습니다.

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User Contributed Notes 1 note

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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

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