3v4l.org

run code in 500+ PHP versions simultaneously
<?php class Foo { protected static $a = 1; protected $b = 2; public function func() { echo 'foo' . static::$a . $this->b; } } class Bar extends Foo { protected static $a = 3; protected $b = 4; public function func() { echo 'bar' . static::$a . $this->b; } } $obj = new Bar(); $obj->func(); // Prints 'bar' $parentClassString = get_parent_class($obj); $newObj = new $parentClassString; // Gotta love PHP for magic like this $newObj->func(); // Prints 'foo'
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
bar34foo12

preferences:
101.62 ms | 1922 KiB | 4 Q