3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Dog {} interface DogFeeder { function feed(Dog $dog); } function feedChihuahua(DogFeeder $feeder) { $feeder->feed(new Chihuahua()); // this code is OK } class BulldogFeeder implements DogFeeder { function feed(Bulldog $dog) { } } feedChihuahua(new BulldogFeeder()); //
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Fatal error: Could not check compatibility between BulldogFeeder::feed(Bulldog $dog) and DogFeeder::feed(Dog $dog), because class Bulldog is not available in /in/WjOFg on line 14
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Fatal error: Could not check compatibility between BulldogFeeder::feed(Bulldog $dog) and DogFeeder::feed(Dog $dog), because class Bulldog is not available in /in/WjOFg on line 14
Process exited with code 255.
Output for 7.1.26 - 7.1.33, 7.2.17 - 7.2.33, 7.3.0 - 7.3.33
Fatal error: Declaration of BulldogFeeder::feed(Bulldog $dog) must be compatible with DogFeeder::feed(Dog $dog) in /in/WjOFg on line 12
Process exited with code 255.
preferences:
184.99 ms | 402 KiB | 164 Q