3v4l.org

run code in 500+ 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 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
string(1) "X" string(1) "X"

preferences:
28.69 ms | 1152 KiB | 7 Q