Question
I am trying to execute a js action that automatically sends informations to the URL for future use with php. To do so, I added a "onload" event on the window object and modified the URL in the listener. This is what it looks like so far:
https://stackoverflow.com/questions/20845951
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Russianwindow.addEventListener("load", function() {
window.location = "?test=test";
}, false);
When I load the page, the URL changes, but this is repeated over and over until the browser crashes. I was just wondering if there was a way to only execute it once.
Solution
If you don't want to use AJAX, and don't want to write JS functions to parse query strings, why not a simple:
<?php if(!isset($_GET['test'])): ?>
<script>
window.addEventListener("load", function() {
window.location = "?test=test";
}, false);
</script>
<?php else: ?>
<!--No JS written on the page, so no redirect -->
<?php endif;?>
But you really should look into AJAX, try using some JS framework like jQuery to help you in the process: http://api.jquery.com/jquery.ajax/
OTHER TIPS
Check to see if you're already ON that page, before redirecting.
Add a simple flag on the URL like so: window.location = "?test=test&second=true";
As suggested in How can I get query string values in JavaScript?
Write a function to check get the URL params in JS GetQueryStringParams()
Then as suggested by others pass a send param in while reload
window.location = "?test=test&second=true";
Use the function in JS to check if you have a URL query string second and if its not there then reload the page
if you want to pass variables do this:
<?php
if(!isset($_GET['page'])){ //this line check if the variable field is available
$a = "Blank";
}else{
$a = $_GET['page'];
}
?>
that is it.
You could just erase the onLoad method once it's run, like so:
<script>
function doLoadStuff()
{
doSomeStuff();
//Clear onLoad contents
body.onLoad = function() {};
}
</script>
<body onLoad="doLoadStuff();">MyContent</body>
