3v4l.org

run code in 300+ PHP versions simultaneously
<?php foreach (array(0.1, -0.1, 1.0, 123.4, -123.4, -5.45, 5.46) as $i) { $b=sprintf("%.1e\n", $i); echo $i.' => '.(float)$b. "\n"; }
Output for 5.2.1 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
0.1 => 0.1 -0.1 => -0.1 1 => 1 123.4 => 120 -123.4 => -120 -5.45 => -5.5 5.46 => 5.5
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0
0.1 => 0.1 -0.1 => -0.1 1 => 1 123.4 => 100 -123.4 => -100 -5.45 => -5 5.46 => 5
preferences:
317.75 ms | 402 KiB | 457 Q