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run code in 200+ php & hhvm versions
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<?php $num = "0x123"; var_dump((int) $num); var_dump((float) $num); var_dump($num * 2);
based on Y34TJ
Output for 7.1.0 - 7.2.0
int(0) float(0) Notice: A non well formed numeric value encountered in /in/WH93d on line 8 int(0)
Output for 7.0.0 - 7.0.20
int(0) float(0) int(0)
Output for 5.3.19 - 5.6.28
int(0) float(0) int(582)