How to Pass a JS Variable to a PHP Variable
- by dmullins
Hello:
I am working on a web application that currently provides a list of documents in a MySql database. Each document in the list has an onclick event that is suppose to open the specific document, however I am unable to do this.
My list gets popluated using Ajax. Here is the code excerpt (JS):
function stateChanged()
{
if (xmlhttp.readyState==4)
{
//All documents//
document.getElementById("screenRef").innerHTML="<font id='maintxt'; name='title'; onclick='fileopen()'; color='#666666';>" + xmlhttp.responseText + "</font>";
}
}
}
The onclick=fileopen event above triggers the next code excerpt, which downloads the file (JS):
function stateChanged()
{
if (xmlhttp.readyState==4)
{
//Open file
var elemIF = document.createElement("iframe");
elemIF.src = url;
elemIF.style.display = "none";
document.body.appendChild(elemIF);
}
}
}
Lastly, the openfile onclick event triggers the following php code to find the file for downloading (php):
$con = mysql_connect("localhost", "root", "password");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("Documents", $con);
$query = mysql_query("SELECT name, type, size, content FROM upload WHERE name = NEED JS VARIABLE HERE");
$row = mysql_fetch_array($query);
header ("Content-type: ". $row['type']);
header ("Content-length: ". $row['size']);
header ("Content-Disposition: attachement; filename=". $row['name']);
echo $row['content'];
This code works well, for downloading a file. If I omit the WHERE portion of the Sql query, the onclick event will download the first file. Somehow, I need to get the screenRef element text and change it into a variable that my php file can read. Does anyone know how to do this? Also, without any page refreshes.
I really appreciate everyone's feedback and thank you in advance.
DFM
