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<?php $ids = [1, 2, 'string']; array_filter($ids, function ($id) { $pass = is_numeric($id) && $id == (int) $id; assert($pass, $id . ' is not an integer'); return $pass; });
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught AssertionError: string is not an integer in /in/7dae2:7 Stack trace: #0 /in/7dae2(7): assert(false, 'string is not a...') #1 [internal function]: {closure}('string') #2 /in/7dae2(5): array_filter(Array, Object(Closure)) #3 {main} thrown in /in/7dae2 on line 7
Process exited with code 255.

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