Array Program

function getDuplicateValue($checkArray){
	$tempArray = array();
    $duplicateValue = array();
    
    foreach($checkArray as $values){
    	
    	if(!in_array($values, $tempArray)){
        	$tempArray[] = $values;
           
        }else{
        	$duplicateValue[] = $values;
        }
    }

	return sizeof($checkArray) != sizeof($tempArray) ?  $duplicateValue : -1;
}

$original_array = array(1,2,4,5,5);

getDuplicateValue($original_array);

print_r(getDuplicateValue($original_array));