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@ 2023-04-17T03:01:01Z

<?php

$map = new WeakMap();
$object = new stdClass();
$map[$object] = null;

var_dump(gettype($map[$object]));
var_dump(isset($map[$object]));

Output
Performance
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var_dump: documentation ( source)

preferences:dark modelive preview

24.89 ms | 404 KiB | 5 Q