3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = true; --$a; if($a == true){ echo "đã true"; }else{ echo "vẫn false"; } echo PHP_EOL.$a.PHP_EOL; $b = null; echo ++$b;
Output for 8.3.0 - 8.3.23, 8.4.1 - 8.4.10
Warning: Decrement on type bool has no effect, this will change in the next major version of PHP in /in/fi4t7 on line 5 đã true 1 1
Output for 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 - 8.1.33, 8.2.0 - 8.2.29
đã true 1 1
preferences:
48.08 ms | 409 KiB | 5 Q