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<?php $array1 = array('blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4); $array2 = array('green' => 5, 'blue' => 6, 'yellow' => 7, 'cyan' => 8); var_dump(array_diff_key($array1, $array2)); ?>
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { ["red"]=> int(2) ["purple"]=> int(4) }

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