CachingIterator::offsetGet()

(PHP 5>=5.2.0,PHP 7)

The offsetGet purpose

说明

publicCachingIterator::offsetGet(string $index) : void

Warning

本函数还未编写文档，仅有参数列表。

参数

$index

Description...

返回值

Description...

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