3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = 'a'; echo --$str; $str = 'b'; echo --$str;
Output for 8.3.0 - 8.3.6
Deprecated: Decrement on non-numeric string has no effect and is deprecated in /in/MrNUk on line 3 a Deprecated: Decrement on non-numeric string has no effect and is deprecated in /in/MrNUk on line 6 b
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 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 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
ab
preferences:
224.22 ms | 406 KiB | 371 Q