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<?php $result = []; foreach ([NULL, TRUE, FALSE, 0, 1, 'none'] as $v) { $eq = ($v == 'none'); $neq = ($v != 'none'); if ($eq && !$neq) { $result['== "none"'][] = $v; } elseif (!$eq && $neq) { $result['!= "none"'][] = $v; } else { // Hope this never occurs. $result['???'][] = $v; } } var_export($result);
Output for git.master, git.master_jit, rfc.property-hooks
array ( '!= "none"' => array ( 0 => NULL, 1 => false, 2 => 0, 3 => 1, ), '== "none"' => array ( 0 => true, 1 => 'none', ), )

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