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<?php $arr = [ 5 => 'b', 10 => 'c', ]; var_export($arr); echo PHP_EOL; array_unshift($arr, 'a'); var_export($arr); echo PHP_EOL;
Output for git.master, git.master_jit, rfc.property-hooks
array ( 5 => 'b', 10 => 'c', ) array ( 0 => 'a', 1 => 'b', 2 => 'c', )

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