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

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 :)

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 :)

• php
• javascript

Share Improve this question Follow asked Sep 7, 2013 at 9:57 PoojaPooja 17011 gold badge11 silver badge1010 bronze badges 6

• 1 alert(<?php print($b); ?>); will do – Shankar Narayana Damodaran Commented Sep 7, 2013 at 10:00
• Thanks shankar..it works very well :) – Pooja Commented Sep 7, 2013 at 10:11
• Cool.Yw. Happy Coding ! – Shankar Narayana Damodaran Commented Sep 7, 2013 at 10:12
• possible duplicate of Passing a PHP variable to JavaScript – M Khalid Junaid Commented Sep 7, 2013 at 10:21
• @dianuj: well i guess it is, but i tried to search the question for duplicate entry before posting the question!! – Pooja Commented Sep 7, 2013 at 10:22

 |  Show 1 more comment

5 Answers 5

Sorted by: Reset to default 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

Have you tried this?

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

I use it like this

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

1.

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

you have to script off on when php start

This worked for me :

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