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<?php $a = ["foo"]; function bar($b) { $b[0] = "bar"; } array_walk( $a, "bar"); print_r( $a);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Only the first byte will be assigned to the string offset in /in/U6b9p on line 5 Array ( [0] => foo )

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