Store a formula in a table and use the formula in a javascript/PHP function

Posted by Muhaimin Abdul on Pro Webmasters See other posts from Pro Webmasters or by Muhaimin Abdul
Published on 2014-06-11T06:50:16Z Indexed on 2014/06/11 9:42 UTC
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php

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JavaScript

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mysql

I have a MySql database where part of it handles instrument's depth of water. Each instrument has its own formula of calculation how depth the water when the operator collect the reading I stored the formula for each instrument in database/MySql.

Example formula: [55-57]

this is the simple minus operation, where the number is actually represent the id of a row. How do I represent those number with id of a row and later convert it to javascript readable code. I simply want to do keyup event where everytime user key in something into text field then the other part of HTML would reflect changes based on formula that I fetched from database

FYI, I'm using BackboneJS together with RequireJS

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