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<?php class A { public function f() { return false; } } $a = new A(); function ff(A $a = null) { if ($a->f()) { echo 1; } else { echo 0; } } ff(5);
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: ff(): Argument #1 ($a) must be of type ?A, int given, called in /in/1DojL on line 20 and defined in /in/1DojL:11 Stack trace: #0 /in/1DojL(20): ff(5) #1 {main} thrown in /in/1DojL on line 11
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Fatal error: Uncaught TypeError: ff(): Argument #1 ($a) must be of type ?A, int given, called in /in/1DojL on line 20 and defined in /in/1DojL:11 Stack trace: #0 /in/1DojL(20): ff(5) #1 {main} thrown in /in/1DojL on line 11
Process exited with code 255.
Output for 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught TypeError: Argument 1 passed to ff() must be an instance of A or null, int given, called in /in/1DojL on line 20 and defined in /in/1DojL:11 Stack trace: #0 /in/1DojL(20): ff(5) #1 {main} thrown in /in/1DojL on line 11
Process exited with code 255.
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33
Fatal error: Uncaught TypeError: Argument 1 passed to ff() must be an instance of A or null, integer given, called in /in/1DojL on line 20 and defined in /in/1DojL:11 Stack trace: #0 /in/1DojL(20): ff(5) #1 {main} thrown in /in/1DojL on line 11
Process exited with code 255.
Output for 7.0.0 - 7.0.20
Fatal error: Uncaught TypeError: Argument 1 passed to ff() must be an instance of A, integer given, called in /in/1DojL on line 20 and defined in /in/1DojL:11 Stack trace: #0 /in/1DojL(20): ff(5) #1 {main} thrown in /in/1DojL on line 11
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Catchable fatal error: Argument 1 passed to ff() must be an instance of A, integer given, called in /in/1DojL on line 20 and defined in /in/1DojL on line 11
Process exited with code 255.

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