3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = "10 kB"; $b = "10 kB"; $c = $a-$b; echo $c; ?>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: A non-numeric value encountered in /in/nUq7K on line 4 Warning: A non-numeric value encountered in /in/nUq7K on line 4 0
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: A non well formed numeric value encountered in /in/nUq7K on line 4 Notice: A non well formed numeric value encountered in /in/nUq7K on line 4 0
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.3.32 - 7.3.33
0

preferences:
191.49 ms | 402 KiB | 287 Q