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<?php class Invoker { public function __invoke() { echo 'hello!'; } } class Obj { public static function method() { } } function doClosure(Closure $closure) { echo 'didClosure...'; $closure(); } function doCallable(callable $cb) { echo 'didCallable...'; $cb(); } doCallable(function () {}); // works doCallable(new Invoker()); // works doCallable(['Obj', 'method']); // works doClosure(function () {}); // works doClosure(new Invoker()); // does not work doClosure(['Obj', 'method']); // does not work
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
didCallable...didCallable...hello!didCallable...didClosure... Fatal error: Uncaught TypeError: doClosure(): Argument #1 ($closure) must be of type Closure, Invoker given, called in /in/f1sn8 on line 35 and defined in /in/f1sn8:17 Stack trace: #0 /in/f1sn8(35): doClosure(Object(Invoker)) #1 {main} thrown in /in/f1sn8 on line 17
Process exited with code 255.
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 didCallable...didCallable...hello!didCallable...didClosure... Fatal error: Uncaught TypeError: doClosure(): Argument #1 ($closure) must be of type Closure, Invoker given, called in /in/f1sn8 on line 35 and defined in /in/f1sn8:17 Stack trace: #0 /in/f1sn8(35): doClosure(Object(Invoker)) #1 {main} thrown in /in/f1sn8 on line 17
Process exited with code 255.
Output for 7.2.4, 7.3.24 - 7.3.33, 7.4.12 - 7.4.33
didCallable...didCallable...hello!didCallable...didClosure... Fatal error: Uncaught TypeError: Argument 1 passed to doClosure() must be an instance of Closure, instance of Invoker given, called in /in/f1sn8 on line 35 and defined in /in/f1sn8:17 Stack trace: #0 /in/f1sn8(35): doClosure(Object(Invoker)) #1 {main} thrown in /in/f1sn8 on line 17
Process exited with code 255.
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