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@ 2015-11-18T15:50:09Z

<?php

$a = [ 'foo' => null ];
var_dump(isset($a['foo']));

$b = new stdClass;
$b->foo = null;
var_dump(isset($b->foo));

Output
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var_dump: documentation ( source)

preferences:dark modelive preview

50.73 ms | 402 KiB | 5 Q