using onclick to run php and java

hwttdz

I'm trying to make a button that when clicked first calls a function in php then does window.open() with another file. Right now what I have is:

<input type="submit" value="issue notam" onclick="phpfunction($id)">

function phpfunction($id)
{
$_SESSION['id']=$id;
?>window.open('notam1.php','','height=100,width=530,resizable=yes')<?php
}

I've tried a few different ones but can't seem to both set the session value and then do the window.open action. Thanks for any help.

planetsim

You'll find that HTML cannot call a PHP function. Try have the PHP page your calling do the session work.

hwttdz

The php page needs the info in the session so that won't work. Is there a way to make the javascript to edit the session data?

thorpe

i must say these words at least ten times a day. php is server-side while javascript is client-side and never the two shall meet.

the only way you can get a value from javascript to php is by making a request to the server.

basically, for an onlick() event to call a php function, you will need to put that function in a file, then make your onclick() submit to that file. of course there is always more than one way to do something. if you want to get right into the thick of client/server interaction start googling for tutorials on ajax

Jasp182

instead of using the submit button's onclick event, why not just use a hidden field with the id number and use the form's action to reload the page. Then, test for the $_POST variable and assign the session id and parse the javascript function if it exists.

For example:

<?php { ?>
  <form method="post" action="thispage.php">
    <input type="hidden" name="id" value="<?= $id ?>">
    <input type="submit" value="issue notam">
  </form>
<? } ?>

Then, also on the page, you can test for the $_POST['id'] and run both the php code to save the session id and parse the Javascript function to the browser if it exists. If it does not exist, neither occurs.

For example:

<?php

if (isset($_POST['id']))
{
  $_SESSION['id']=$_POST['id']; 
?>

<script language="Javascript" type="text/javascript">
  window.open('notam1.php','','height=100,width=530,resizable=yes');
</script>

<? } ?>

My syntax might be incorrect or I may be missing something (I'm still very new to all this), but this should do the trick if you don't mind reloading the page (which is really your only option when you need to call php functions based on JS events).

Richardtagger

well cant you just have it open a different page which calls the function and then redirects to the page you want..?

thorpe

Richardtagger wrote:
well cant you just have it open a different page which calls the function and then redirects to the page you want..?

yeah.... what i said.

Richardtagger

lol, i never read your comment 😛

johnix

i am a beginner in this field of web programming. as what i read from those post that html cant call a php function. i have read also your post... what if i will going to use image to be my button how can i pass the data to session? as of now im trying to make simple events... what i want to see is if i click the image thats should be the time to call or start working my php code and what i did is like this which is incorrect

<img src="power.gif" onClick="click()">
<?
function click()
{
"codes"
}
?>
.. do you have any idea on how to do the proper way?
hope you can help me with this..
you can email me at johnche_12@yahoo.com

scrupul0us

you cant do that

any function calls within the HTML environment will only work with javascript

if u want to interface that with PHP you need to either:
-post data with a form using $POST/$GET
-use AJAX (not for beginners)