send php variable value via javascript in url

Question

I've read this post(how do i send a variable in the url in javascript), but can't get it to work. I must add that I don't know javascript at all. I'm trying to open an new "printer friendly" page in php, but in order for that I need to send the userid with the url, my code looks like this:

Page1

<?php
session_start();
$userid = $_SESSION['userid'];
?>
<head>
<script type="text/javascript">
function open_win()
{
window.open("http://www.mysite.com/exams/print.php?uid_print=$userid",'','width=200,height=100')
}
</script>
</head>
<?php
if ($_SESSION['auth']) {  
include 'datalogin.php';

echo "<input type='button' value='Print this page' onclick='open_win()' />";

Page2(print.php)

<?php
session_start();
include 'datalogin.php';
$uid_print1 = $_GET['uid_print'];

echo $uid_print1;

But my ouput is: $userid

animuson · Accepted Answer · 2012-03-09 19:52:42Z

4

window.open("http://www.mysite.com/exams/print.php?uid_print=&lt;?php echo $userid; ?>",'','width=200,height=100')

edited Mar 9, 2012 at 19:52

animuson♦

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answered Mar 6, 2012 at 9:29

Sudhir Bastakoti

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Comments

SecStone · Accepted Answer · 2012-03-06 09:33:50Z

2

At the moment the variable in your javascript tag is not replaced because it is not enclosed by PHP tags. You can easily do it like this:

window.open("http://www.mysite.com/exams/print.php?uid_print=<?php echo $userid; ?>",'', 'width=200,height=100')

answered Mar 6, 2012 at 9:33

SecStone

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Comments

hsz · Accepted Answer · 2012-03-06 09:29:10Z

2

Modify your window.open line to looks like this:

window.open("http://www.mysite.com/exams/print.php?uid_print=<?php echo $userid; ?>",'','width=200,height=100');

You have to 'enter' PHP block, and print out $userid variable to HTML (JavaScript) output.

answered Mar 6, 2012 at 9:29

hsz

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Comments

Ynhockey · Accepted Answer · 2012-03-06 09:29:41Z

2

This line in your JS script:

window.open("http://www.mysite.com/exams/print.php?uid_print=$userid",'','width=200,height=100')

Outputs '$userid' directly. You need to replace $userid with something like:

<?php echo $userid; ?>

answered Mar 6, 2012 at 9:29

Ynhockey

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Comments

Sarfraz · Accepted Answer · 2012-03-06 09:29:42Z

2

Use <?php....?> tags:

...print.php?uid_print=<?php echo $userid;?>

answered Mar 6, 2012 at 9:29

Sarfraz

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Comments

Community · Accepted Answer · 2023-11-17 19:37:06Z

2

Replacing:

window.open("http://www.mysite.com/exams/print.php?uid_print=$userid",'','width=200,height=100')

With:

window.open("http://www.mysite.com/exams/print.php?uid_print=<?php echo $userid; ?>",'','width=200,height=100')

Should probably do the trick.

You can also use the shorthand <?= $userid ?> which, to my eyes is more readable.

edited Nov 17, 2023 at 19:37

CommunityBot

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answered Mar 6, 2012 at 9:30

Kristoffer Sall-Storgaard

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Comments

Moiz Shafqat Husain · Accepted Answer · 2012-03-06 09:31:13Z

2

please concatenate $userid in your javascript.

it can be concatenated like uid_print='.$userid.' and you will get the value in $_GET["uid_print"]

you can also echo the $userid in string like

answered Mar 6, 2012 at 9:31

Moiz Shafqat Husain

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