3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Test { private $x = 123; public function printX($test) { print $test->x; } } $test1 = new Test; $test2 = new Test; $test1->printX($test2);
Output for 7.1.25 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
123

preferences:
137.42 ms | 407 KiB | 5 Q