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<?php class Foo { public static function isItInt(string $i) { var_dump(is_int($i)); } } Foo::isItInt("1");
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, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
bool(false)
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Catchable fatal error: Argument 1 passed to Foo::isItInt() must be an instance of string, string given, called in /in/l5e8R on line 9 and defined in /in/l5e8R on line 4
Process exited with code 255.

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