Works locally (win), remotely says "undefined method mysqli_result::fetch_all()" (CentOS 6)

gistfile1.txt

...
		echo("<PRE>");
		print_r( $conn );// prints out mysqli Object
		echo("</PRE>");
		
		//create SQL query
		$stmt = "SELECT column_name FROM information_schema.columns	WHERE table_name =  '". $tableName ."' ORDER BY ordinal_position";
		$query = $conn->query($stmt);

		//execute query
		$clmNames = $query->fetch_all(MYSQLI_ASSOC); //error log states "PHP Fatal error:  Call to undefined method mysqli_result::fetch_all() in ...
		
		//clear memory
		$query->free();unset($query);
...