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<?php $values = [10, 10, 5, 8]; $found = []; foreach ($values as $index => $value) { if (!isset($found[$value])) { $found[$value] = $index; } else { unset($values[$index], $values[$found[$value]]); } } var_export($values);
Output for git.master, git.master_jit, rfc.property-hooks
array ( 2 => 5, 3 => 8, )

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