Fetch db data depending on selected drop down value

[cainam29]

I want to pull up the data that corresponds to the value of the drop down and show it to a text area within a fieldset, I want my page to just initially show the drop down then after selecting a value it will show the data in a text area without refreshing the page, here is the code:

<div id="mainContent">
<table width="619" border="0" align="center">
<td align="center"><form id="form1" name="form1" method="post" action="" >
<fieldset>
<legend><strong>EA</strong></legend>
<p> 
<select name="ea_name" id="ea_name">
<option value="" selected="selected">Please select...</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
</select>
</p>
</fieldset>
</form></td>
</table>

<div id="results"></div>
</div>

Here is the code that I've tried that will pull up data and show to a text area but all im getting is No results found.

<?php
require 'include/DB_Open.php';

$ea_name = $_POST['ea_name'];

$sql="SELECT * FROM ea_error WHERE ea_name = '" . $ea_name . "'";

$myData = mysql_query($sql);

//to count if there are any results
$numrow = mysql_num_rows($myData);

if($numrow == 0)
{
    echo "No results found.";
}
else
{
echo '<fieldset><legend><strong>Information</strong></legend><p>
<table width="auto" height="172" border="0">
<tr><th>Error</th></tr>
<tr><th>Resolution</th></tr>
<tr><th>Contact/s</th></tr>';

while($info = mysql_fetch_array($myData)) 
{
echo "<form action='retrieve.php' method='post'>";

echo"<tr>"; 
echo  "<td align='center'>" . $info['error'] . "<input type=hidden name=error value=" . $info['error'] . " </td>";
echo  "<td align='center'>" . $info['resolution'] . "<input type=hidden name=resolution value=" . $info['resolution'] . " size='11' maxlength='11' /> </td>"; 
echo  "<td align='center'>" . $info['contacts'] . "<input type=hidden name=contacts value=" . $info['contacts'] . "' /> </td>"; 
echo "</tr>"; 
echo "</form>";
}
}
echo "</fieldset>"; 

include 'include/DB_Close.php';
?>

[Barand]

Your form has no submit button so how are you sending the selected value?

[cainam29]

through a jquery...

[fastsol]

Just do some basic diagnostics then, first you need to sanitize the value of your post.  According to your select menu it's an integer but I assume that is just an example, so you need to use mysql_real_escape_string() and then add mysql_error() after the query to see why the query is failing.

$ea_name = mysql_real_escape_string($_POST['ea_name']);
$myData = mysql_query($sql);
echo mysql_error();