3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(ini_get('mbstring.internal_encoding')); var_dump(mb_internal_encoding());
Output for 5.6.8 - 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, 8.3.0 - 8.3.6
string(0) "" string(5) "UTF-8"
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35
string(0) "" string(10) "ISO-8859-1"
Output for 5.2.7 - 5.2.17
bool(false) string(10) "ISO-8859-1"
Output for 4.3.3 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.6
string(10) "ISO-8859-1" string(10) "ISO-8859-1"
Output for 4.3.0 - 4.3.2
string(4) "none" string(4) "pass"

preferences:
221.13 ms | 401 KiB | 328 Q