3v4l.org

run code in 300+ PHP versions simultaneously
<?php eval('namespace X; class Cl { public const n = __NAMESPACE__; }'); $cl = eval('namespace X; return new class() { public const n = __NAMESPACE__; };'); var_dump(X\Cl::n); var_dump(get_class($cl)::n);
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
string(1) "X" string(1) "X"

preferences:
77.45 ms | 406 KiB | 5 Q