- array_unique: documentation ( source)
<?php
$month=Array
(
"1" => Array
(
"0" => "2013-07",
"1" => "4",
"2" => "4",
"3" => "3060",
"4" => "1"
),
"2" => Array
(
"0" => "2013-07",
"1" => "270",
"2" => "757",
"3" => "13812810",
"4" => "4"
)
);
$month = array_unique($month);
?>