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<?php array_walk($jsonArray, function (&$subarray) use ($checkin) { $subarray['check_in_date'] = $checkin; });
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $checkin in /in/1ttpb on line 3 Fatal error: Uncaught TypeError: array_walk(): Argument #1 ($array) must be of type array, null given in /in/1ttpb:3 Stack trace: #0 /in/1ttpb(3): array_walk(NULL, Object(Closure)) #1 {main} thrown in /in/1ttpb on line 3
Process exited with code 255.

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