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run code in 150+ php & hhvm versions
Bugs & Features
<?php $mynumber = (float) "3.8e-7"; var_dump($mynumber); printf('%F', $mynumber);
Output for 4.3.10 - 4.4.9, 5.0.3 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
float(3.8E-7) 0.000000
Output for 4.3.0 - 4.3.9, 5.0.0 - 5.0.2
float(3.8E-7)