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<?php function a(bool $a) { var_dump($a); } a(1); a(true); a("");
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
bool(true) bool(true) bool(false)
Output for 5.6.0 - 5.6.28
Catchable fatal error: Argument 1 passed to a() must be an instance of bool, integer given, called in /in/ZClQ9 on line 8 and defined in /in/ZClQ9 on line 3
Process exited with code 255.

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