3v4l.org

run code in 300+ PHP versions simultaneously
<?php $s='123 123 12345'; echo $lenght = strlen($s); for($i=0;$i<=$lenght;$i++){ echo $s[$i]; }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
13123 123 12345 Warning: Uninitialized string offset 13 in /in/BRhbV on line 8
Output for 5.2.10 - 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 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.33
13123 123 12345 Notice: Uninitialized string offset: 13 in /in/BRhbV on line 8
Output for 7.3.32 - 7.3.33
13123 123 12345
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 - 5.2.9
13123 123 12345 Notice: Uninitialized string offset: 13 in /in/BRhbV on line 8
preferences:
250.25 ms | 402 KiB | 354 Q