3v4l.org

run code in 500+ PHP versions simultaneously
<?php class C { public ?int $v = 123; } $x = new C; unset($x->v); $y = new C; $y->v = null; print array_key_exists('v', (array)$x); print array_key_exists('v', (array)$y);
Output for 7.3.0 - 7.3.33
Parse error: syntax error, unexpected '?', expecting function (T_FUNCTION) or const (T_CONST) in /in/7L3qP on line 3
Process exited with code 255.
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.4, 8.3.6 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
1
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 1
preferences:
34.78 ms | 1507 KiB | 12 Q