PHP 8.3.4 Released!

CachingIterator::offsetSet

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

CachingIterator::offsetSetThe offsetSet purpose

说明

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

本函数还未编写文档,仅有参数列表。

参数

key

The index of the element to be set.

value

The new value for the key.

返回值

没有返回值。

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User Contributed Notes 1 note

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ddrake at dreamingmind dot com
4 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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