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<?php $arr = [ ['a','b'], ['c','d'], ['e','f'], ]; var_export( array_merge( ...array_map( 'array_fill_keys', $arr, array_keys($arr) ) ) );
Output for git.master, git.master_jit, rfc.property-hooks
array ( 'a' => 0, 'b' => 0, 'c' => 1, 'd' => 1, 'e' => 2, 'f' => 2, )

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