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@ 2020-01-03T09:45:33Z

<?php

$array = [];
$key = 12;

$val = isset($array[$key]) ? $array[$key] : null;

var_dump($val);

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive previewkey bindings

51.64 ms | 1450 KiB | 5 Q