posting data into two database tables - php

Question

I am trying to post data into two databases namely add_product and ledger but I keep getting the following error message:
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'desc, amount)values('mnbvx', 'opening stock', '5')' at line 1
Below is my PHP code:
<?php
include ('session.php');
if($_GET["name"] && $_GET["opening"]&& $_GET["re"])
{
$servername="localhost";
$username="root";
$db="multiple";
$pass="";
mysql_connect($servername,$username)or die(mysql_error());
mysql_select_db($db) or die(mysql_error());
$name=$_GET["name"];
$op=$_GET["opening"];
$re=$_GET["re"];
mysql_query("insert into add_product (product, opening, current, reorder)values('$name', '$op', '$op', '$re')");
mysql_query("insert into ledger (product, desc, amount)values('$name', 'opening stock', '$op')")or die(mysql_error());
print "<h4>product added to database</h4>";
print "<p><a href='add_pdt.html'>add another?</a></p>";
print "<a href='index_admin.php'>home</a>";
}
else{
print "please fill all fields correctly";
print " ";
print "<p><a href='add_pdt.html'>back</a></p>";
print "<p><a href='index_admin.php'>home</a></p>";
}
?>
below is - Table structure for table `ledger`
CREATE TABLE IF NOT EXISTS `ledger` (
`product` varchar(60) NOT NULL,
`desc` varchar(60) NOT NULL,
`amount` varchar(15) NOT NULL,
`date` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
below --
-- Table structure for table `add_product`
CREATE TABLE IF NOT EXISTS `add_product` (
`product` varchar(30) NOT NULL,
`id` int(30) NOT NULL,
`opening` int(100) NOT NULL,
`current` int(100) NOT NULL,
`reorder` int(6) NOT NULL,
`updateon` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=93 ;
--

Answer 1

Use this query instead of your second query.
mysql_query("insert into ledger (`product`, `desc`, `amount`)values('$name', 'opening stock', '$op')")or die(mysql_error());

Answer 2

DESC is a reserved keyword. Either use backticks around it:
`desc`
or rename it.

Answer 3

desc is resevered ... and mysql is depricated...
use
$con = ('localhoat','root','','database_name');
mysqli_query($con,"insert into ledger (`product`, `desc`, `amount`)values('$name','opening stock', '$op')")or die(mysql_error()");