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<?php $regions = [ 'int' => 1, 'nl' => 2, 'be' => 4, 'us' => 8, 'as' => 16, 'za' => 32, ]; for ($i = 0; $i < (1 << count($regions)); $i++) array_walk(@array_filter($regions, function ($x) use ($i) { return $x & $i; }), function ($x, $region) use (&$list) { isset($list[$region]) and $list[$region] .= ","; $list[$region] .= $x; } ); var_dump($list);
Output for git.master_jit, git.master, rfc.property-hooks
Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Warning: Undefined array key "int" in /in/TegUe on line 14 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Warning: Undefined array key "nl" in /in/TegUe on line 14 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Warning: Undefined array key "be" in /in/TegUe on line 14 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Warning: Undefined array key "us" in /in/TegUe on line 14 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Warning: Undefined array key "as" in /in/TegUe on line 14 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Warning: Undefined array key "za" in /in/TegUe on line 14 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 Notice: Only variables should be passed by reference in /in/TegUe on line 13 array(6) { ["int"]=> string(63) "1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1" ["nl"]=> string(63) "2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2" ["be"]=> string(63) "4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4" ["us"]=> string(63) "8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8" ["as"]=> string(95) "16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16" ["za"]=> string(95) "32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32" }

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