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<?php function reduce_array(array $source) { $picked_mark=array(); $result=array(); foreach($source as $key=>$subarray) { if(in_array(end($subarray),$picked_mark)) continue; $result[$key]=$subarray; $picked_mark[]=end($subarray); } return $result; } print_r(reduce_array(json_decode("[[1,2,3,4],[2,3,4],[100,101,102,103],[101,102,103]]")));
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 ) [2] => Array ( [0] => 100 [1] => 101 [2] => 102 [3] => 103 ) )

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