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run code in 200+ php & hhvm versions
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<?php $i = 1; $i = $i++; var_dump($i); $i = 1; $i = ++$i; var_dump($i);
Output for 4.3.0 - 5.6.30, hhvm-3.10.1 - 3.17.3, 7.0.0 - 7.2.0
int(1) int(2)