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<?php function foo($aaa):?object { return new StdClass; } var_dump(foo(123));
Output for 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
object(stdClass)#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(stdClass)#1 (0) { }
Output for 7.1.0 - 7.1.33
Fatal error: Uncaught TypeError: Return value of foo() must be an instance of object or null, instance of stdClass returned in /in/n7PZI:3 Stack trace: #0 /in/n7PZI(6): foo(123) #1 {main} thrown in /in/n7PZI on line 3
Process exited with code 255.
Output for 7.0.0 - 7.0.33
Parse error: syntax error, unexpected '?' in /in/n7PZI on line 2
Process exited with code 255.
Output for 5.6.0 - 5.6.40
Parse error: syntax error, unexpected ':', expecting '{' in /in/n7PZI on line 2
Process exited with code 255.

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