Pass a script variable from HTML to PHP

Question

I tried to find a solution but nothing is working for me, or too complicated.

I'm trying to send a variable from a script in my HTML to my php file.

Here my HTML script

<script type="text/javascript">
    function DetectAndServe() {
        urlp=[];u=location.search.replace("?","").split("&").forEach(function(d){e=d.split("=");urlp[e[0]]=e[1];})
        var redirectlink = "https://www.mywebsite.com/redirect_app?utm_medium=" + urlp.utm_medium + "&utm_source=" + urlp.utm_source + "&utm_campaign=" + urlp.utm_campaign;
    }   
</script>

What's the easiest way to use the redirectlink variable in my PHP file

Ok thanks, can you be more specific, how to use it in my case, I'm beginner — Joris
– Joris, Commented Jan 22, 2019 at 14:25
Please do some research into using AJAX, and then come back here when you have a specific question -- SO is not a drive-thru code generation service. — BenM
– BenM, Commented Jan 22, 2019 at 14:26
You can also make a form to post you're URL into the php file — executable
– executable, Commented Jan 22, 2019 at 14:27
do you need to invoke that link so you can capture urlp.utm_medium, urlp.utm_source and urlp.utm_campaign as $_GET['utm_medium'], $_GET['utm_source'] and $_GET['utm_campaign'] respectively? — coderodour
– coderodour, Commented Jan 22, 2019 at 14:31

executable · Accepted Answer · 2019-01-22 14:54:07Z

2

You actually need to create a form to send the result of your function into the PHP file.

Example of form with JavaScript:

<form method="post" action="#">
    <input type="text" id="redirectlink" name="redirectlink">
    <button type="submit">Send</button>
</form>
<script>
function DetectAndServe() {
    urlp=[];u=location.search.replace("?","").split("&").forEach(function(d){e=d.split("=");urlp[e[0]]=e[1];})
    var redirectlink = "https://www.mywebsite.com/redirect_app?utm_medium=" + urlp.utm_medium + "&utm_source=" + urlp.utm_source + "&utm_campaign=" + urlp.utm_campaign;
    return redirectlink;
}  
document.getElementById('redirectlink').value = DetectAndServe();
</script>

In your PHP you retreive with:

<?php
if(isset($_POST['redirectlink'])){
    $link = $_POST['redirectlink'];
    echo $link;
}

edited Jan 22, 2019 at 14:54

answered Jan 22, 2019 at 14:43

executable

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4 Comments

coderodour Over a year ago

DetectAndServe is not returning anything.

executable Over a year ago

Yep, just fixed it

Joris Over a year ago

Thank you so much it's working well, I just have an other issue now I'm unable to reset the form with document.frm.reset(); I have the error "document.frm.reset is not a function", I maybe need to post an other question

executable Over a year ago

You need to use it like this document.getElementById("idform").reset();

Pascal Tovohery · Accepted Answer · 2019-01-22 14:51:35Z

0

In your html file

<script type="text/javascript">
window.location.href = 'https://www.mywebsite.com/myfile.php?variable1=value1&variable2=value2';
</script>

In your php file you can get the value pass to the url via $_GET request

echo $_GET['variable1'] // print value1
echo $_GET['variable2'] // print value2

answered Jan 22, 2019 at 14:51

Pascal Tovohery

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