mysql - how to do calculation in jqgrid PHP -

mysql - how to do calculation in jqgrid PHP -

i have problem

i have 3 column in jqgrid.

let’s a,b,c.

when insert data, have fill info column a , b.

column c automatically inserted value of a+b.

i'm using jqgrid php , i’m using form insert data

is there way on how assign , insert value of c?

you can calculate value of c custom formatter without php

<table id="#grid-table"></table> jquery("#grid-table").jqgrid({ colnames: ['id', 'a', 'b', 'c'], colmodel: [ {name: 'id', key: true, index: 'id', hidden: true}, {name: 'a', index: 'a'}, {name: 'b', index: 'b'}, {name: 'c', formatter: function(cellvalue, options, rowdata) { homecoming rowdata.a + rowdata.b; }} ] })

php mysql jqgrid