3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(bin2hex(htmlspecialchars("A\xf4\x90\x80\x80B", ENT_NOQUOTES, 'UTF-8')));
Output for 5.3.4 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
string(0) ""
Output for 4.3.2 - 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 - 5.3.3
string(12) "41f490808042"
Output for 4.3.0 - 4.3.1

Process exited with code 139.

preferences:
316.44 ms | 401 KiB | 456 Q