Want to select data from database on selecting two dropdown

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I want two drop down in PHP
one is for selecting school standard
second is for selecting admission year
based on that i need two display result please help for that
I am using PHP , MYSQL , AJAX , Javascript
I have using following code

Javascript code :

C#

<script>
function showUser(str,str1)
{
if (str=="")
  {
  document.getElementById("txtHint").innerHTML="";
  return;
  }
if (window.XMLHttpRequest)
  {// code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
  }
else
  {// code for IE6, IE5
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {
    document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
    }
  }
xmlhttp.open("GET","update_new_records_view.php?q="+ str,true);
xmlhttp.send();
}
</script>

and html code is :

XML

<table>
    <tr>
    <td colspan="2">&nbsp;</td><td style="color:red;">Select Current Standard</td>
    <td><select name="select_std"><option selected="selected">Select Division</option>
        <?php
        include('db.php');
        //POPULATE DROP DOWN MENU WITH COUNTRIES FROM A GIVEN standard

        $sql = "SELECT * FROM master_std";
        $standards = mysql_query($sql);

        while($row = mysql_fetch_array($standards))
        {
            echo ("<option id='$row[id] 'value='$row[id]'>$row[name_std]</option>");
        }
        ?></select>
        </tr>
    <tr><td colspan="2">&nbsp;</td><td style="color:red;">Select Academic Year</td>
    <td>

    <select name="year" onchange='showUser(this.value)'><option selected="selected">Select Academic Year</option>
        <?php

        include('db.php');
        //POPULATE DROP DOWN MENU WITH COUNTRIES FROM A GIVEN standard

        $sql = "SELECT * FROM master_year ORDER BY year_id";
        $category = mysql_query($sql);

        while($row = mysql_fetch_array($category))
        {
            $id=$row['adm_year'];
            echo ("<option id='$row[year_id]' value='$row[year_id]' >$row[adm_year]</option>");
        }
        ?>
        </select></td>
    </tr>
    </table>

Posted 29-Mar-14 22:04pm

Rohit Katariya

Updated 29-Mar-14 22:10pm

v3

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Comments

PrissySC 30-Mar-14 7:34am

Where is your connection?

http://www.w3schools.com/php/php_mysql_select.asp

EZW 30-Mar-14 21:10pm

Also just a side-note... MySQL extension (what you're using to access the database) is going to be deprecated in the future and it is recommended to either use MySQLi extension or PDO.

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Rohit Katariya · Answer 1 · 2014-03-30T22:15:00

This is my code in update_new_records_view.php

XML

<?php
            $q = $_GET['q'];
            //$id =$_REQUEST['a_std'];
            echo "$id";
            require_once "db.php";
/*          $result = mysql_query("SELECT mf.total_fees as fees,tf.payment_dt as pdate,mf.paid_fees as paid,mf.bal as bal,mf.prn_no as prn,ad.student_name as name FROM master_fees mf,admission ad,tran_fees tf WHERE mf.fees_clear='1' and mf.bal='0' and mf.prn_no = ad.prn_no and mf.prn_no = tf.prn_no GROUP BY mf.prn_no");
    */
            $result = mysql_query("SELECT distinct t.prn_no as prn,t.sr_no as srno,a.student_name as sname,ms.name_std as std,t.adm_year as year FROM admission a, tran_allstudents t,master_year m, master_std ms where t.prn_no = a.prn_no and t.adm_year=m.adm_year and m.year_id='$q' and ms.id=t.name_std ");

            echo"<table class='table table-bordered' id='sample_1'>
                <thead>
                <tr>
                    <td id='ff'>GR No</td>
                    <td id='ff'>Sr No</td>
                    <td id='ff'>Student Name</td>
                    <td id='ff'>Standard</td>
                    <td id='ff'>Year</td>
                    <td id='ff'>Status</td>
                </tr>
                </thead>
                ";
            echo "";
            while($row = mysql_fetch_array($result))
            {
                echo"
                <tr>
                    <td align='center'><input type='text' name='grno[]' value='".$row['prn']." 'style='width:70px;height:27px;'disabled/></td>
                    <td align='center'><input type='text' name='grno[]' value='".$row['srno']."'style='width:110px;height:27px;'disabled/></td>
                    <td align='center'><input type='text' name='grno[]' value='".$row['sname']."'style='width:250px;height:27px;'disabled/></td>
                    <td align='center'><input type='text' name='grno[]' value='".$row['std']."'style='width:50px;height:27px;'disabled/></td>
                    <td align='center'><input type='text' name='grno[]' value='".$row['year']."'style='width:90px;height:27px;'disabled/></td>
                    <td align='center'><input type = 'Checkbox' name ='srnocheck[]' value ='<?php echo $row[srno]?>'/></td>
                </tr>";
            }

            echo "</table>";

            //mysql_close($con);
        ?>