Embedding php in javascripts

Question

I was trying to embed some PHP into a javscript function that gets called from an onChange in a drop down list. the javascript function is in a .js file, I can get the DDL to call the function, however i cannot get the function to work with the php... eventually i am going to use the value selected in the DDL to access a DB and populate other fields from there, right now i am trying to get it to work with the php:

    function controllerType(){

       alert('outside php');
       <?php
       $message = "inside php";
       echo "alert('$message');";
       ?>

     }

The function prints the first alert but not the alert called in the php.

When you examine the JavaScript, do you see the PHP "as is" ? — alex
– alex, Commented May 9, 2011 at 3:57

Austin · Accepted Answer · 2011-05-09 03:49:57Z

4

Your webserver probably isn't looking for PHP code in .js files by default. You'll have to tell it to either look for PHP in those files or change the file extension to .php.

If you you want to try the former and you're running an Apache web server, try adding the following line to your .htaccess file:

AddHandler application/x-httpd-php .js

answered May 9, 2011 at 3:49

Austin

4753 silver badges8 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

dbo Over a year ago

is there a way to make an onChange call a PHP function in a php file?

Austin Over a year ago

@user744480 That's a complicated topic and should be posted in a separate question.

Justin · Accepted Answer · 2011-05-10 02:19:57Z

1

Try the following

function controllerType() {
    alert('outside php');
    alert('<?php echo $message; ?>');
}

edited May 10, 2011 at 2:19

Justin

87.3k49 gold badges231 silver badges374 bronze badges

answered May 9, 2011 at 3:49

Atticus

6,75211 gold badges39 silver badges59 bronze badges

4 Comments

alex Over a year ago

There shouldn't be a difference from JavaScript's point of view.

Atticus Over a year ago

I wouldn't think so either :-\

Nicklas A. Over a year ago

Now you're create PHP code with javascript, I think OP's idea was to create JS code with PHP :)

Atticus Over a year ago

What are you talking about? You can't create PHP code with javascript, at least definietly not this way -- one would need an asycn/syncrhonous request to do that.... This is simply putting a PHP variable into his javascript code... So yes, I am creating JS code with PHP.. i dont know where you see it otherwise..

alex · Accepted Answer · 2011-05-09 03:48:30Z

0

You can't call an alert() in PHP.

PHP can just echo text the JavaScript interpreter can interpret as JavaScript.

As for the code you posted, that should all be ran by JavaScript fine. CodePad.

answered May 9, 2011 at 3:48

alex

492k205 gold badges891 silver badges992 bronze badges

Comments

Nicklas A. · Accepted Answer · 2011-05-09 03:51:34Z

0

I think the problem might be that your javascript is not being evaluated by your PHP parser. You might have to create a separate document for that function which ends in .php or using a .htaccess (assuming you're using apache) to tell your php handler to parse .js files

answered May 9, 2011 at 3:51

Nicklas A.

7,0717 gold badges44 silver badges67 bronze badges

Comments

Kane Wallmann · Accepted Answer · 2011-05-09 05:24:09Z

0

From your following sentence:

eventually i am going to use the value selected in the DDL to access a DB and populate other fields from there

It really sounds like you are trying to have the PHP code execute at runtime within the browser. PHP is a server side language and you cannot simply use it in a javascript file as you are trying to.

You will need to have the javascript function post the value from the drop down list to a PHP page through a HTML form or through AJAX.

Forgive me if I misunderstood you.

answered May 9, 2011 at 5:24

Kane Wallmann

2,32215 silver badges10 bronze badges

2 Comments

dbo Over a year ago

It sounds like you understood what i was trying to get at, i basically need the page to reload displaying information retrieved from the database based on the value selected... so you are suggesting i create a javascript that sends the selected value to a new php page?

Kane Wallmann Over a year ago

That is correct. You could do it simply by using window.location.href = "page.php?item=" + ddl_value; That would redirect the user to php page. The other way to do it without reloading the page is to use AJAX, have a look at the JQuery javascript library, it makes dealing with AJAX a lot easier.

score 0 · Accepted Answer · 2012-08-12 02:31:50Z

0

<?php
   $message = "inside php";
?>
<script type="text/javascript">
function controllerType(){
       alert('outside php');
       alert(<?=$message;?>);
     }
</script>

edited Aug 12, 2012 at 2:31

answered May 9, 2011 at 3:50

user744116

Collectives™ on Stack Overflow

Embedding php in javascripts

6 Answers 6

2 Comments

4 Comments

Comments

Comments

2 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

6 Answers 6

2 Comments

4 Comments

Comments

Comments

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related