3v4l.org

run code in 300+ PHP versions simultaneously
<?php class C { function __toString(): string { return 'instance of C'; } } class D extends C { function __toString() /* should `: string` be implicit? */ { return 'instance of D'; } }
Output for 8.0.10, 8.1.23 - 8.1.28, 8.2.10 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
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
Output for 7.4.0 - 7.4.23
Fatal error: Declaration of D::__toString() must be compatible with C::__toString(): string in /in/hTMvA on line 10
Process exited with code 255.
Output for 7.2.0 - 7.2.29, 7.3.0 - 7.3.17
Fatal error: Declaration of D::__toString() must be compatible with C::__toString(): string in /in/hTMvA on line 13
Process exited with code 255.
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