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@ 2020-05-09T16:07:09Z

<?php

$map = new WeakMap;
$obj = new stdClass;
$map[$obj] = 42;
var_dump($map);

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive previewkey bindings

42.64 ms | 1549 KiB | 5 Q