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<?php var_dump(sin('15')); @var_dump(sin('0xF')); var_dump(round('15')); var_dump(round('0xF')); ?>
based on ODHrv
Output for 7.0.0 - 7.2.0
float(0.65028784015712) float(0) float(15) float(0)
Output for 5.3.19 - 5.6.28
float(0.65028784015712) float(0.65028784015712) float(15) float(15)