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<?php function foo(int $x = NUM) {} foo(12); foo(null);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Fatal error: Uncaught TypeError: foo(): Argument #1 ($x) must be of type int, null given, called in /in/7N3R0 on line 6 and defined in /in/7N3R0:3 Stack trace: #0 /in/7N3R0(6): foo(NULL) #1 {main} thrown in /in/7N3R0 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: foo(): Argument #1 ($x) must be of type int, null given, called in /in/7N3R0 on line 6 and defined in /in/7N3R0:3 Stack trace: #0 /in/7N3R0(6): foo(NULL) #1 {main} thrown in /in/7N3R0 on line 3
Process exited with code 255.
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant NUM - assumed 'NUM' (this will throw an Error in a future version of PHP) in /in/7N3R0 on line 3 Fatal error: Uncaught TypeError: Argument 1 passed to foo() must be of the type int, null given, called in /in/7N3R0 on line 6 and defined in /in/7N3R0:3 Stack trace: #0 /in/7N3R0(6): foo(NULL) #1 {main} thrown in /in/7N3R0 on line 3
Process exited with code 255.
Output for 7.2.0 - 7.2.33
Warning: Use of undefined constant NUM - assumed 'NUM' (this will throw an Error in a future version of PHP) in /in/7N3R0 on line 3 Fatal error: Uncaught TypeError: Argument 1 passed to foo() must be of the type integer, null given, called in /in/7N3R0 on line 6 and defined in /in/7N3R0:3 Stack trace: #0 /in/7N3R0(6): foo(NULL) #1 {main} thrown in /in/7N3R0 on line 3
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33
Notice: Use of undefined constant NUM - assumed 'NUM' in /in/7N3R0 on line 3 Fatal error: Uncaught TypeError: Argument 1 passed to foo() must be of the type integer, null given, called in /in/7N3R0 on line 6 and defined in /in/7N3R0:3 Stack trace: #0 /in/7N3R0(6): foo(NULL) #1 {main} thrown in /in/7N3R0 on line 3
Process exited with code 255.
Output for 5.6.4 - 5.6.28
Catchable fatal error: Argument 1 passed to foo() must be an instance of int, integer given, called in /in/7N3R0 on line 5 and defined in /in/7N3R0 on line 3
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.3
Fatal error: Default value for parameters with a class type hint can only be NULL in /in/7N3R0 on line 3
Process exited with code 255.

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