I'm trying to load an image (created with PHP) with jQuery and passing a few variables with it (for example: picture.php?user=1&type=2&color=64
). That's the easy part.
The hard part is that I've a dropdown which enables me to select background (the type parameter) and I'll have an input for example to select a color.
Here're the problems I'm facing:
- If a dropdown/input hasn't been touched, I want to leave it out of the URL.
- If a dropdown/input has been touched, I want to include it in the url. (This won't work by just adding a variable "
&type=2
" to the pre-existing string as if I touch the dropdown/input several times they'll stack (&type=2&type=2&type=3
)). - When adding a variable ("
&type=2
" - see the code below) to the pre-existing URL, the &-sign disappears (it becomes like this: "signature.php?user=1type=2
").
Here's the code for the jQuery:
<script>
var url = "signatureload.php?user=<?php echo $_SESSION['sess_id']; ?>";
$(document).ready(function() {
window.setTimeout(LoadSignature, 1500);
});
$("#signature_type").change(function() {
url += "&type="+$(this).val();
LoadSignature();
});
function LoadSignature()
{
$("#loadingsignature").css("display", "block");
$('#loadsignature').delay(4750).load(url, function() {
$("#loadingsignature").css("display", "none");
});
}
</script>
Here's the code where I load the image:
<div id="loadsignature">
<div id="loadingsignature" style="display: block;"><img src="img/loading-black.gif" alt="Loading.."></div>
</div>
I don't know how more further I could explain my problem. If you have any doubts or need more code, please let me know.
Thank you for your help!
EDIT:
Here's the current code:
<script>
var url = "signatureload.php?user=<?php echo $_SESSION['sess_id']; ?>";
$(document).ready(function() {
window.setTimeout(LoadSignature, 1500);
});
$("#signature_type").change(function() {
url = updateQueryStringParameter(url, 'type', $(this).val());
LoadSignature();
});
function LoadSignature()
{
$("#loadingsignature").css("display", "block");
$('#loadsignature').delay(4750).load(url, function() {
$("#loadingsignature").css("display", "none");
});
}
function updateQueryStringParameter(uri, key, value)
{
var re = new RegExp("([?&])" + key + "=.*?(&|$)", "i"),
separator = uri.indexOf('?') !== -1 ? "&" : "?",
returnUri = '';
if (uri.match(re))
{
returnUri = uri.replace(re, '$1' + key + "=" + value + '$2');
}
else
{
returnUri = uri + separator + key + "=" + value;
}
return returnUri;
}
</script>
EDIT2:
Here's the code for signatureload.php
<?php
$url = "signature.php?";
$count = 0;
foreach($_GET as $key => $value)
{
if($count > 0) $url .= "&";
$url .= "{$key}={$value}";
}
echo "<img src='{$url}'></img>";
?>