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<?php function f(Traversable $t) { foreach ($t as $k => $v) { echo "$k => $v\n"; } } $x = (object)['a','b','c']; f($x);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Fatal error: Uncaught TypeError: f(): Argument #1 ($t) must be of type Traversable, stdClass given, called in /in/XJnNi on line 10 and defined in /in/XJnNi:3 Stack trace: #0 /in/XJnNi(10): f(Object(stdClass)) #1 {main} thrown in /in/XJnNi on line 3
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught TypeError: Argument 1 passed to f() must implement interface Traversable, instance of stdClass given, called in /in/XJnNi on line 10 and defined in /in/XJnNi:3 Stack trace: #0 /in/XJnNi(10): f(Object(stdClass)) #1 {main} thrown in /in/XJnNi on line 3
Process exited with code 255.
Output for 5.5.0 - 5.5.37, 5.6.0 - 5.6.28
Catchable fatal error: Argument 1 passed to f() must implement interface Traversable, instance of stdClass given, called in /in/XJnNi on line 10 and defined in /in/XJnNi on line 3
Process exited with code 255.

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