3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function calculateLevels( $total, $iteration = 0 ) { if( $total <= 1 ) { return $iteration; } else { return calculateLevels( (int) ( $total / 2 ), $iteration + 1 ); } } $x = 15; echo "$x - " .calculateLevels( $x ) . "\n"; $x = 10; echo "$x - " .calculateLevels( $x ) . "\n"; $x = 8; echo "$x - " .calculateLevels( $x ) . "\n"; $x = 7; echo "$x - " .calculateLevels( $x ) . "\n"; $x = 1; echo "$x - " .calculateLevels( $x ) . "\n"; $x = 2; echo "$x - " .calculateLevels( $x ) . "\n"; $x = 3; echo "$x - " .calculateLevels( $x ) . "\n";
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
15 - 3 10 - 3 8 - 3 7 - 2 1 - 0 2 - 1 3 - 1