This is how i pass a variable called NewEmployee from Add_Employee.php to Insert_Employee.php... hope it helps
**Add_Employee.php**
<form action="Insert_Employee.php" method="post" name="" id="">
<p>
<strong>Employee Name:</strong>
<input name="NewEmployee" type="text" id="NewEmployee" />
</p>
<input name="submit" type="submit" id="Insert Employee" value="Insert Employee" />
</form>
then in *******Insert_Employee.php
<?php
echo $NewEmployee; //show variable NewEmployee
//add NewEmployee to Database
$sql="INSERT INTO EmployeeNames VALUES('$NewEmployee')";
$rs=odbc_exec($conn,$sql);
odbc_close($conn);
?>