get the javacript value php

raven1001

Any one knows how can I get the javascript value in php when I onclick the button within the same page?

for example

<script>
function a(){

var abc="hello";

}

</script>


<?  $cde =   // this should be the value from javacript  ?>

ANyone done that before? thanks!

Logged

paulnaj

Hi raven,

It ain't gonna happen, at least in the way you hope.

PHP is run at the server and results in (usually) HTML being delivered to the client browser, where javascript can be used.

They are not 'active' at the same point in the whole process.

You could do ...

<script language="javascript" type="text/javascript">
function abc(str){ 
  window.location = "<?php echo $_SERVER['PHP_SELF']; ?>?abc=" + str; 
} 
</script>
<a href="javascript:abc('Hello');">Click me</a>
<?
if(isset($_REQUEST['abc'])){
   echo '<h1>'.$_REQUEST['abc'].'</h1>';
}
?>

... but that's probably not what you want.

Paul 🙂

TruckStuff

Pass the javasrcipt value through a form to the next PHP page. Like Paul said, PHP is a server-side language, meaning everything is done by PHP on the server before it is sent to the client. After the data is sent to the client, its all JS.

If you want more client/software interaction, you'll need to look at some other language like Java.

f8ball

I thought I understood this, but I'm thinking I really don't. I understand (again I'm assuming) the difference between server side and client side .. but why wouldn't something like this work?

<script language="JavaScript" type="text/javascript">
function change_text(){
    var message="<?php $my_text = "NICE";?>"; 
}
// instead of "NICE" couldn't you pull data from the db here?
function text_two(){
var message="<?php $my_text = "TWO";?>"; 
}
// same here ...
</script>

<?php print $my_text; ?>
<a href="javascript:change_text();">change text</a></div><br><br>
<a href="javascript:text_two();">change again</a></div>

thorpe

the code you just posted would work. it is passing php variables to javascript. not js to php.

think of it this way. you write html dynamically with php, this html is sent to the client and then interpreted by the browser on the client. javascript is exactly the same. you can create it with php, send it to the client, the client then interperets it. (running the javascript)

paulnaj

Remember to include the 'print' function/statement ...

 <script language="JavaScript" type="text/javascript"> 
function change_text(){ 
    var message="<?php print $my_text = "NICE";?>"; 
} 
// instead of "NICE" couldn't you pull data from the db here? 
function text_two(){ 
var message="<?php print $my_text = "TWO";?>"; 
} 
// same here ... 
</script> 

<?php print $my_text; ?> 
<a href="java script:change_text();">change text</a></div><br><br> 
<a href="java script:text_two();">change again</a></div>

Paul 🙂