Store a session variable in html/javascript

Question

I'm trying to grab a session variable in my javascript, but have some problems getting it right.. I didn't get that to work, so instead i tried to store it in a hidden variable in HTML first, but i dont know how to store a session variable there.. Can anyone guide me to the right path?

The code (HTML file): ($_SESSION["price1"] is equal to "20.00")

<input type="hidden" id="price" value="$_SESSION["price"]"/>

The code in javascript:

    var sessionValue = document.getElementById("price").value;

What to do?

use price1 instead of price in your html

Aditya Singh
– Aditya Singh

2013-10-09 04:27:29 +00:00
Commented Oct 9, 2013 at 4:27 — Aditya Singh
– Aditya Singh, Commented Oct 9, 2013 at 4:27
try document.getElementById("price").defaultValue

Daniel
– Daniel

2013-10-09 04:31:36 +00:00
Commented Oct 9, 2013 at 4:31 — Daniel
– Daniel, Commented Oct 9, 2013 at 4:31

Sudhir Bastakoti · Accepted Answer · 2013-10-09 04:31:12Z

3

you missed PHP tags <?php and echo, change to:

<input type="hidden" id="price" value="<?php echo $_SESSION["price"]; ?>"/>

answered Oct 9, 2013 at 4:31

Sudhir Bastakoti

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Comments

Stefan · Accepted Answer · 2013-10-09 04:38:05Z

2

What everyone bellow mentioned is perfectly true, inside HTML you can just wrap stuff in <?php echo $_SESSION['price']; ?> and it will work (notice the <?php tags)

However, the right way to do this -- considering you want to pass a PHP variable (in your case a session variable) to javascript is to directly insert it into a javascript variable instead of accessing the DOM. This way, you also have it instantly and don't have to wait for the DOM to be loaded

<script>
var price = '<?php echo $_SESSION["price"]; ?>';
alert('The price is: ' + price);
</script>

answered Oct 9, 2013 at 4:38

Stefan

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Comments

Emilio Gort · Accepted Answer · 2013-10-09 04:33:01Z

1

This line:

<input type="hidden" id="price" value="$_SESSION["price"]"/>

Should be:

<input type="hidden" id="price" value="<?php echo $_SESSION["price"];?>"/>

You are missing the php tags

answered Oct 9, 2013 at 4:33

Emilio Gort

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vaibhavmande · Accepted Answer · 2013-10-09 04:33:29Z

1

change,

<input type="hidden" id="price" value="$_SESSION["price"]"/>

To,

<input type="hidden" id="price" value='<?php echo $_SESSION["price"]; ?>'/>

answered Oct 9, 2013 at 4:33

vaibhavmande

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Comments

Lloyd Banks · Accepted Answer · 2013-10-09 04:40:06Z

1

Grab your session variable in JavaScript using this:

var my_session_price = "<?php echo $_SESSION["price"]; ?>";

answered Oct 9, 2013 at 4:40

Lloyd Banks

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