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CachingIterator::offsetSet

(PHP 5 >= 5.2.0, PHP 7)

CachingIterator::offsetSetThe offsetSet purpose

Description

public CachingIterator::offsetSet ( mixed $index , mixed $newval ) : void
Warning

This function is currently not documented; only its argument list is available.

Parameters

index

The index of the element to be set.

newval

The new value for the index.

Return Values

No value is returned.

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User Contributed Notes 1 note

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ddrake at dreamingmind dot com
6 months 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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