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<?php $a = function (int $a = null) : int { $a = 1; if ($a == 2) {return $a;} return null; }; $a();
Output for 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: Uncaught TypeError: {closure}(): Return value must be of type int, null returned in /in/eVYAl:3 Stack trace: #0 /in/eVYAl(5): {closure}() #1 {main} thrown in /in/eVYAl on line 3
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: Uncaught TypeError: {closure}(): Return value must be of type int, null returned in /in/eVYAl:3 Stack trace: #0 /in/eVYAl(5): {closure}() #1 {main} thrown in /in/eVYAl on line 3
Process exited with code 255.
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught TypeError: Return value of {closure}() must be of the type int, null returned in /in/eVYAl:3 Stack trace: #0 /in/eVYAl(5): {closure}() #1 {main} thrown in /in/eVYAl on line 3
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33
Fatal error: Uncaught TypeError: Return value of {closure}() must be of the type integer, null returned in /in/eVYAl:3 Stack trace: #0 /in/eVYAl(5): {closure}() #1 {main} thrown in /in/eVYAl on line 3
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Parse error: syntax error, unexpected ':', expecting '{' in /in/eVYAl on line 3
Process exited with code 255.

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