3v4l.org

run code in 500+ PHP versions simultaneously
<?php class Example { private int $_nextNumber; public int $nextNumber { get { $this->_nextNumber ??= 0; return $this->_nextNumber++; } } } $foo = new Example; var_dump($foo->nextNumber, $foo->nextNumber, $foo->nextNumber); $foo->nextNumber = 42;

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)
8.3.50.0030.00516.78

preferences:
49.7 ms | 493 KiB | 4 Q