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<?php $str = "foo"; $str = array_flip($str); echo $str[$i];;
Output for rfc.property-hooks, git.master, git.master_jit
Fatal error: Uncaught TypeError: array_flip(): Argument #1 ($array) must be of type array, string given in /in/MKZf9:1 Stack trace: #0 /in/MKZf9(1): array_flip('foo') #1 {main} thrown in /in/MKZf9 on line 1
Process exited with code 255.

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