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<?php $r = new ReflectionFunction(function (?int $a): ?int {}); var_dump((string) $r->getParameters()[0]->getType()); var_dump((string) $r->getReturnType());
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(4) "?int" string(4) "?int"
Output for 7.4.0 - 7.4.33
Deprecated: Function ReflectionType::__toString() is deprecated in /in/c21Nq on line 4 string(3) "int" Deprecated: Function ReflectionType::__toString() is deprecated in /in/c21Nq on line 5 string(3) "int"
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33
string(3) "int" string(3) "int"
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33
Parse error: syntax error, unexpected '?', expecting variable (T_VARIABLE) in /in/c21Nq on line 3
Process exited with code 255.
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