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@ 2014-08-05T08:35:00Z

<?php
$st = new stdClass();

$st->q = new stdClass();
$st->q->k = 1;
$st->q->w = 2;

$kl = $st;
unset($kl->q->k);
print_r($st);
print_r($k);

Output
Performance
VLD
References
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print_r: documentation ( source)

preferences:dark modelive preview

33.75 ms | 402 KiB | 5 Q