3v4l.org

run code in 300+ PHP versions simultaneously
<?php Interface I{ public static function init(?string $url): self; } class C implements I{ public static function init(?string $url): self{ return new self(); } } $o = C::init("foo"); var_dump($o);
Output for 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 - 8.3.4, 8.3.6 - 8.3.25, 8.4.1 - 8.4.12
object(C)#1 (0) { }
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 object(C)#1 (0) { }
Output for 7.3.0 - 7.3.33
Fatal error: Declaration of C::init(?string $url): C must be compatible with I::init(?string $url): I in /in/VYbGn on line 5
Process exited with code 255.
Output for 7.0.33
Parse error: syntax error, unexpected '?', expecting variable (T_VARIABLE) in /in/VYbGn on line 3
Process exited with code 255.
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