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<?php $array = [ 'DC, Maryland, Northern-Virginia', 'North-Carolina, Virginia', ]; $result = []; foreach ($array as $string) { array_push($result, ...explode(', ', $string)); } var_export($result);
Output for git.master_jit, git.master, rfc.property-hooks
array ( 0 => 'DC', 1 => 'Maryland', 2 => 'Northern-Virginia', 3 => 'North-Carolina', 4 => 'Virginia', )

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