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run code in 200+ php & hhvm versions
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<?php $float = 0.123456789; $string = "0.123456789"; $floatVal = floatval($string); var_dump( $float, $string, $floatVal );
based on dm3BR
Output for 5.6.30, hhvm-3.18.5 - 3.22.0, 7.0.30 - 7.3.0alpha1
float(0.123456789) string(11) "0.123456789" float(0.123456789)