如何在opencart中为基于重量的运输添加运费

Actually I want to add shipping rates based on region,I added shipping rates like below,

800:40.00,1250:60.00,1700:80.00,2200:100.00,2700:120.00,99999:40.00

If weight is 800 gms it should take 40 and also it should take from 800-1250gms 40 rs but even 1000gms it is taking 60 rs but it shouldn't take how to resolve this?

Use this code to check in range:

function in_range($number, $min, $max)
{
    if (is_int($number) && is_int($min) && is_int($max))
    {
        return ($number >= $min && $number < $max);
    }

    return FALSE;
}

Also you have create array like this:

$array = array(
  [0] => array(
    minw : 1,
    maxw : 1249,
    rate : 40
  ),
  [1] => array(
    minw : 1250,
    maxw : 1699,
    rate : 60
  )
);

After that to get rate use this loop function:

$weight = 500;

function get shipping_rate($array, $weight) {

    foreach($array as offset => $arr) {
        $minw = $arr['minw'];
        $maxw = $arr['maxw'];
        $rate = $arr['rate'];

        if(in_range($weight, $minw, $maxw)) {
            return $rate;
        }
    }

}