<?php
 
$a = [];
 
 
foreach ($b as &$arr) {
}
 
echo "<pre>";
echo "</pre>";
 
				PD9waHAKCiRhID0gW107CgokYiA9IGFycmF5X3BhZCgkYSxtdF9yYW5kKDUsMTApLDApOwoKZm9yZWFjaCAoJGIgYXMgJiRhcnIpIHsKCSRhcnIgPSBtdF9yYW5kKDAsMTAwKTsKfQoKJGEgPSBhc29ydCgkYik7CmVjaG8gIjxwcmU+IjsKcHJpbnRfcigkYSk7CmVjaG8gIjwvcHJlPiI7Cg==