3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump( bin2hex( htmlspecialchars( "\xf4\x90\xbf\xbf", ENT_COMPAT | ENT_HTML401, 'UTF-8' ) ) );
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.36, 5.6.0 - 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) ""
Output for 5.3.4 - 5.3.29
Notice: Use of undefined constant ENT_HTML401 - assumed 'ENT_HTML401' in /in/2EkNl on line 3 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
Notice: Use of undefined constant ENT_HTML401 - assumed 'ENT_HTML401' in /in/2EkNl on line 3 string(8) "f490bfbf"
Output for 4.3.0 - 4.3.1
Notice: Use of undefined constant ENT_HTML401 - assumed 'ENT_HTML401' in /in/2EkNl on line 3
Process exited with code 139.

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204.3 ms | 401 KiB | 362 Q