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@ 2014-07-17T21:30:05Z

<?php
$dataset = array("a" => "one", "b" => "two");
reset($dataset);

while ($a = current($dataset)) {
    next($dataset);
    if ($a == "one") {
        $dataset[$a] = "three";
    }
}

Output
Performance
VLD
References
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reset: documentation ( source)
next: documentation ( source)
current: documentation ( source)

preferences:dark modelive preview

34.81 ms | 402 KiB | 5 Q