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<?php class Foo { } function bar(Foo $foo) { } bar(null);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
Fatal error: Uncaught TypeError: bar(): Argument #1 ($foo) must be of type Foo, null given, called in /in/2hOek on line 9 and defined in /in/2hOek:5 Stack trace: #0 /in/2hOek(9): bar(NULL) #1 {main} thrown in /in/2hOek on line 5
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 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: Argument 1 passed to bar() must be an instance of Foo, null given, called in /in/2hOek on line 9 and defined in /in/2hOek:5 Stack trace: #0 /in/2hOek(9): bar(NULL) #1 {main} thrown in /in/2hOek 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 - 5.6.40
Catchable fatal error: Argument 1 passed to bar() must be an instance of Foo, null given, called in /in/2hOek on line 9 and defined in /in/2hOek on line 5
Process exited with code 255.

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