(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.
Example #1 A APCUIterator::__construct() example
<?php
foreach (new APCUIterator('/^counter\./') as $counter) {
echo "$counter[key]: $counter[value]\n";
apc_dec($counter['key'], $counter['value']);
}
?>
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https://www.php.net/manual/en/apcuiterator.construct.php