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<?php function reflectCallable($arg): ReflectionFunctionAbstract { if (is_array($arg)) { $ref = new ReflectionMethod(...$arg); } elseif (is_callable($arg)) { $ref = new ReflectionFunction($arg); } return $ref; } function definedFunc(Foo $foo) {} $callable = function(Foo $foo) {}; class Bar { public function baz(Foo $foo) {} } foreach (['definedFunc', $callable, ['Bar', 'baz']] as $callable) { $reflected = reflectCallable($callable); if ((string) $reflected->getParameters()[0]->getType() === 'Foo') { echo 'Callable takes Foo', PHP_EOL; } }
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Callable takes Foo Callable takes Foo Callable takes Foo
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Callable takes Foo Callable takes Foo Callable takes Foo
Output for 7.4.0 - 7.4.33
Deprecated: Function ReflectionType::__toString() is deprecated in /in/c5vmM on line 19 Callable takes Foo Deprecated: Function ReflectionType::__toString() is deprecated in /in/c5vmM on line 19 Callable takes Foo Deprecated: Function ReflectionType::__toString() is deprecated in /in/c5vmM on line 19 Callable takes Foo
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