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run code in 300+ PHP versions simultaneously
<?php class X {} class Y extends X {} class A { function f(): X {} } class B extends A { function f(): Y {} }
Output for 7.4.3 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 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 7.0.0 - 7.0.2, 7.2.29 - 7.2.33, 7.3.16 - 7.3.33
Fatal error: Declaration of B::f(): Y must be compatible with A::f(): X in /in/TlYNG on line 11
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.31, 5.6.8 - 5.6.17
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/TlYNG on line 7
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected ':', expecting '{' or ';' in /in/TlYNG on line 7
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected ':', expecting '{' in /in/TlYNG on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected ':', expecting '{' in /in/TlYNG on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/TlYNG on line 7
Process exited with code 255.

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