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<?php function arrayOf(array $stuff, $className){ foreach($stuff as $item){ if(!$item instanceof $className){ return false; } } return true; } /** * @param array|Foo[] $param */ function bar(array $param){ assert(arrayOf($param, Foo::CLASS)); echo "works\n"; } class Foo{} bar([new Foo, new Foo, new Foo, new Foo, new Foo]); bar([new Foo, new Foo, new stdClass, new Foo, new Foo]);
Output for git.master, git.master_jit, rfc.property-hooks
works Fatal error: Uncaught AssertionError: assert(arrayOf($param, Foo::class)) in /in/tddY0:16 Stack trace: #0 /in/tddY0(16): assert(false, 'assert(arrayOf(...') #1 /in/tddY0(22): bar(Array) #2 {main} thrown in /in/tddY0 on line 16
Process exited with code 255.

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