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<?php $a = ['array' => 1]; var_dump(array_walk($a, 'is_array'));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught ArgumentCountError: is_array() expects exactly 1 argument, 2 given in /in/2JthJ:5 Stack trace: #0 [internal function]: is_array(1, 'array') #1 /in/2JthJ(5): array_walk(Array, 'is_array') #2 {main} thrown in /in/2JthJ on line 5
Process exited with code 255.

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