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<?php $array = array("123", "1244","34124","123"); $dupe_array = array(); foreach($array as $val){ if(++$dupe_array[$val] > 1){ echo "has duplicate"; } } echo "has no duplicate";
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined array key 123 in /in/oOp1r on line 6 Warning: Undefined array key 1244 in /in/oOp1r on line 6 Warning: Undefined array key 34124 in /in/oOp1r on line 6 has duplicatehas no duplicate

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