如何将Javascript变量插入PHP代码[重复]

Question

This question already has an answer here:

• javascript variable into php 3 answers

i have php code like this

<?php
        $queryitemkits="select item_id, cost_price, unit_price from items where item_id='JAVASCRIPTVARIABLE'";


        $resultqueryitemkit = mysql_query($queryitemkits) or die('Query failed item kits!'); 
        while($rowitem = mysql_fetch_assoc($resultqueryitemkit))
                    { 
                        $itemcostprice=$rowitem['cost_price'];
                        $itemunitprice=$rowitem['unit_price'];
                    }
?>

and i have javascript variable named ui.item.value

how to insert that ui.item.value javascript variable to replace JAVASCRIPTVARIABLE in above PHP code?

</div>

Answer 1

Remember PHP is on the server, and the variable "JAVASCRIPTVARIABLE" in the client, you need to submit the variable to the server, also you need input validation, JAVASCRIPTVARIABLE it can be empty when is received on the server.