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run code in 200+ php & hhvm versions
Bugs & Features
<?php $dp = new DateInterval('P1D'); var_dump(isset($dp->d), $dp->d);
based on rIZvR
Output for 7.0.20 - 7.2.0
bool(true) int(1)
Output for 5.3.18 - 7.0.6
bool(false) int(1)