How to add php content or variable inside javascript alert box?! javascript, php, alertbox

Question

How can i add php content or php variable inside Java-script alert box?! I tried to make it work few ways but it is only popping up a blank box rather than the contents of php variable.

Here is the code:

<script language="javascript">
    $(document).ready(function() {
        $("#a").blur(function() {           
            <?php $b = $_POST['a'];

            if(isset($_POST['update'])) {
            mysql_query("UPDATE tbl_travel set fld_a='".$_POST[$b]."' where fld_id = '".$_POST["id"]."' ") or die(mysql_error());
            } ?>

                alert (<?php $b ?>);
           });
    });
</script>

Thank You for your Help :)

@dianuj: well i guess it is, but i tried to search the question for duplicate entry before posting the question!! — Pooja
– Pooja, Commented Sep 7, 2013 at 10:22

Sergio · Accepted Answer · 2013-09-07 10:07:16Z

8

Change this

alert (<?php $b ?>);

to this

alert ('<?php echo $b; ?>');

You need to output the value of $b and add quotes inside the alert.

About PHP - echo

edited Sep 7, 2013 at 10:07

answered Sep 7, 2013 at 9:59

Sergio

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7 Comments

Pooja Over a year ago

Hey thanks for the answer totally missed using echo before $b. BTW need to put double quotes too alert ("<?php echo $b; ?>");

Sergio Over a year ago

You don't need low reputation to accept answer, just to upvote. You get also +2 when you accept. :)

Sergio Over a year ago

@Pooja, under the score of the answer were you can upvote and downvote there is a check mark, press there in the answer you want to accept and you get +2 reputation. You have some other old questions you asked were you can do that also :)

Sergio Over a year ago

@Pooja, exactly! if you do that on your other questions you will get more reputation also

Pooja Over a year ago

oh yes i found it! Thanks for informing about that...accepted your answer ^_^

|

M Khalid Junaid · Accepted Answer · 2013-09-07 10:17:04Z

3

Have you tried this?

alert ('<?php echo $b ?>');

edited Sep 7, 2013 at 10:17

M Khalid Junaid

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answered Sep 7, 2013 at 9:59

mkas

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Comments

Danh · Accepted Answer · 2016-11-17 02:06:51Z

2

I use it like this

$text="Example PHP Variable Message";
echo '<script type="text/javascript">alert("'.$text.'")</script>';

edited Nov 17, 2016 at 2:06

Danh

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answered Nov 16, 2016 at 18:59

Zafer BAHADIR

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Comments

TLama · Accepted Answer · 2014-01-22 12:16:38Z

1

1.

<script>
  alert("</script><?php $r=5;echo $r;?> <script>")
</script>

you have to script off on when php start

edited Jan 22, 2014 at 12:16

TLama

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answered Jan 22, 2014 at 11:48

jignesh

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Comments

Praveesh P · Accepted Answer · 2018-03-07 16:52:06Z

0

This worked for me :

alert ("<?php echo $b; ?>");

answered Mar 7, 2018 at 16:52

Praveesh P

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