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<?php $arr = array(12,43,66,21,56,43,43,78,78,100,43,43,43,21); foreach($arr as $key=>$item){ if(array_count_values($arr)[$item] > 1){ echo "Found Matched value : ".$item."\n"; } }
Output for git.master, git.master_jit, rfc.property-hooks
Found Matched value : 43 Found Matched value : 21 Found Matched value : 43 Found Matched value : 43 Found Matched value : 78 Found Matched value : 78 Found Matched value : 43 Found Matched value : 43 Found Matched value : 43 Found Matched value : 21

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