3v4l.org

run code in 300+ PHP versions simultaneously
<?php $s = 'hello'; var_dump($s[0]); // "h" var_dump($s[0][0]); // "h"
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 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, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
string(1) "h" string(1) "h"
Output for 5.0.0 - 5.0.5, 5.1.1 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
string(1) "h" Fatal error: Cannot use string offset as an array in /in/dBOsK on line 5
Process exited with code 255.
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/dBOsK on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
string(1) "h" NULL
preferences:
97.82 ms | 410 KiB | 5 Q