How to update MySQL db from two associative array in php

Question

I received two associative array and I want to update it's values in mysql db. So, I did this:

// for all other contacts
if(isset($_POST['otherAddress']) || isset($_POST['otherComments']))
{
    $otherAddress = $_POST['otherAddress'];
    $otherComments = $_POST['otherComments'];

    foreach (array_keys($otherAddress + $otherComments) as $key) 
    {
        $query = "UPDATE `boardcontacts` SET
        `address`='$otherAddress[$key]',`comments`='$otherComments[$key]'
        WHERE `memberID` = '$nID' AND `addressType`='other'";

        mysql_query($query);
    } // for end
} // if end

Problem is: It duplicate all updated rows with the last index of each array. Any help ?

Answer 1

Just curious are you updating the value of $nID ??
Because if the foreach executes without updating $nID the query will update the values in the same row every time because the where condition is same every time.