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<?php class HiddenUser { } class User { } class Foo { public function bar(User $u) {} } $foo = new Foo(); $user = new User(); $user = new HiddenUser(); $foo->bar($user);
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::bar(): Argument #1 ($u) must be of type User, HiddenUser given, called in /in/8HJQp on line 16 and defined in /in/8HJQp:10 Stack trace: #0 /in/8HJQp(16): Foo->bar(Object(HiddenUser)) #1 {main} thrown in /in/8HJQp on line 10
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Fatal error: Uncaught TypeError: Foo::bar(): Argument #1 ($u) must be of type User, HiddenUser given, called in /in/8HJQp on line 16 and defined in /in/8HJQp:10 Stack trace: #0 /in/8HJQp(16): Foo->bar(Object(HiddenUser)) #1 {main} thrown in /in/8HJQp on line 10
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught TypeError: Argument 1 passed to Foo::bar() must be an instance of User, instance of HiddenUser given, called in /in/8HJQp on line 16 and defined in /in/8HJQp:10 Stack trace: #0 /in/8HJQp(16): Foo->bar(Object(HiddenUser)) #1 {main} thrown in /in/8HJQp on line 10
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
Catchable fatal error: Argument 1 passed to Foo::bar() must be an instance of User, instance of HiddenUser given, called in /in/8HJQp on line 16 and defined in /in/8HJQp on line 10
Process exited with code 255.

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