(PECL apcu >= 5.0.0)
APCUIterator::__construct — Constructs an APCUIterator iterator object
$search = null,$format = APC_ITER_ALL,$chunk_size = 100,$list = APC_LIST_ACTIVEConstructs an APCUIterator object.
search
      Either a PCRE regular expression that
      matches against APCu key names, given as a string.
      Or an array of strings with APCu key names.
      Or, optionally null to skip the search.
     
formatThe desired format, as configured with one or more of the APC_ITER_* constants.
chunk_sizeThe chunk size. Must be a value greater than 0. The default value is 100.
list
      The type to list. Either pass in APC_LIST_ACTIVE
      or APC_LIST_DELETED.
     
Örnek 1 A APCUIterator::__construct() example
<?php
foreach (new APCUIterator('/^counter\./') as $counter) {
    echo "$counter[key]: $counter[value]\n";
    apc_dec($counter['key'], $counter['value']);
}
?>