3v4l.org

run code in 500+ PHP versions simultaneously
<?php class A { const B = C; } class C {} const C = new C; const A = 'Z'; // unused echo A::class::B::class; echo (A::class)::B::class; echo A::B::class;

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

VersionSystem time (s)User time (s)Memory (MiB)
8.5.70.0150.00616.82

preferences:
44.09 ms | 480 KiB | 5 Q