3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(iconv_substr('20', 2, 1));
Output for 7.0.11 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.32, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
string(0) ""
Output for 7.3.32 - 7.3.33, 7.4.33, 8.0.13
Fatal error: Uncaught Error: Call to undefined function iconv_substr() in /in/upruF:2 Stack trace: #0 {main} thrown in /in/upruF on line 2
Process exited with code 255.
Output for 5.6.0 - 5.6.28, 7.0.0 - 7.0.10
bool(false)

preferences:
158.98 ms | 401 KiB | 188 Q