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@ 2021-06-25T13:55:02Z

<?php

$x = null;
$x++;
var_dump($x);
$x--;
var_dump($x);

$x = null;
$x--;
var_dump($x);

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive preview

32.71 ms | 402 KiB | 5 Q