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run code in 300+ PHP versions simultaneously
<?php class A { static function foo() { echo " self refers to " . self::class . "\n" . " static refers to " . static::class . "\n"; } } class B extends A {} echo "Calling A::foo():\n"; A::foo(); echo "Calling B::foo():\n"; B::foo();
Output for 5.6.38, 7.0.33, 7.1.0 - 7.1.25, 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
Calling A::foo(): self refers to A static refers to A Calling B::foo(): self refers to A static refers to B

preferences:
114.03 ms | 1498 KiB | 4 Q