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<?php $sum = function($l):integer { return function($r) use ($l) { return $l + $r; }; }; echo $sum(4)(2);
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
Warning: "integer" will be interpreted as a class name. Did you mean "int"? Write "\integer" to suppress this warning in /in/ZvT5s on line 2 Fatal error: Uncaught TypeError: {closure}(): Return value must be of type integer, Closure returned in /in/ZvT5s:5 Stack trace: #0 /in/ZvT5s(9): {closure}(4) #1 {main} thrown in /in/ZvT5s on line 5
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 Warning: "integer" will be interpreted as a class name. Did you mean "int"? Write "\integer" to suppress this warning in /in/ZvT5s on line 2 Fatal error: Uncaught TypeError: {closure}(): Return value must be of type integer, Closure returned in /in/ZvT5s:5 Stack trace: #0 /in/ZvT5s(9): {closure}(4) #1 {main} thrown in /in/ZvT5s on line 5
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, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught TypeError: Return value of {closure}() must be an instance of integer, instance of Closure returned in /in/ZvT5s:5 Stack trace: #0 /in/ZvT5s(9): {closure}(4) #1 {main} thrown in /in/ZvT5s on line 5
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28
Parse error: syntax error, unexpected ':', expecting '{' in /in/ZvT5s on line 2
Process exited with code 255.

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