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<?php function foo(int $arg) { return $arg; } var_dump(foo('10'));
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, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
int(10)
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Catchable fatal error: Argument 1 passed to foo() must be an instance of int, string given, called in /in/qe8hb on line 7 and defined in /in/qe8hb on line 3
Process exited with code 255.

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