submitting a form without redirection

AndreF

Is it possible to not be redirected to another page via form submission?

in blah.php I have this:

switch ($_POST['do']) {
case "optimize":
DB_Optimize();
echo '<script language="javascript">
alert("Database has been optimized.");
</script>';
break;

}

then in test.php I have this:
<form name="optimize" method="post" action="blah.php">
<input type="hidden" name="do" value="optimize">
</form>
<a href="#" onclick="document.optimize.submit()">Optimize Database</a>

But by clicking "Optimize Database" I just mean to run DB_Optimize() function then a JS alert pops up. But I don't want to be actually redirected to blah.php which is a blank page and I want to stay in test.php after clicking the link.

Any advice, how I can do it?

NogDog

AJAX, perhaps?

Pehape

include your function in same page and call it with onclick event.
sorry if i have misunderstood.. 🙂

AndreF

@ Pehape:

before I post this thread I did that, but another problem: as the alert thing is up of the code, first I see the alert message on a blank page, then I see the page only after clicking "Ok" on alert window. I did move the alert line to bottom of code then I see:
<script language="javascript">
alert("Database has been optimized.");
</script>

after
</body></html> which is not nice.

@ NogDog:
I don't know anything about Ajax, can you help me further to find the appropriate ajax code for the purpose? I searched and found lots of unrelated things. please help further.

Pehape

before I post this thread I did that, but another problem: as the alert thing is up of the code, first I see the alert message on a blank page, then I see the page only after clicking "Ok" on alert window. I did move the alert line to bottom of code then I see:
<script language="javascript">
alert("Database has been optimized.");
</script>

</body></html> which is not nice.

your alert message shows up because you put your script on the top inside the body tag (before your main body text ) so your browser loads it immediately before your page is entirely loaded.
but you said that you have tried to move it to the bottom and your script is accidentally displayed in browser...
i'm not sure but this is usually caused if our browser doesn't support javascript or it has been disabled perhaps. why don't u try it on different browser?
or maybe you could define your alert in a function, say almsg() - put it in head tag, and later you can call it when your optimize button is clicked.
also for additional, remember that u can actually point to the same page with

action = "$_SERVER['PHP_SELF']"

good luck, CMIIW... 🙂

AndreF

No, JS was enabled in browser and alert was shown when the page is loaded completely but the location of <script> tag is after </html> because I put that code block at the bottom of page.

As about Ajax I found this one:
http://www.modernmethod.com/sajax/
but I don't know how to modify it for my needs and for what I want to do. would someone help me to integrate that sajax thing with what I want to do and mentioned above?
I'll appreciate it.

BlueKai

Is there a reason you're not doing a self-submitting form?

AndreF

Why should it be self-submitting?

BlueKai

I'd use a self-submitting form like this:

<?php

function DB_Optimize() {
echo "function done";
}

if (isset($POST['do'])){
switch ($POST['do']) {
case "optimize":
DB_Optimize();
echo '<script language="javascript">
alert("Database has been optimized.");
</script>';
break;
}
}

echo "<form name='optimize' method='post' action='{$_SERVER['PHP_SELF']}'>
<input type='hidden' name='do' value='optimize'>
</form>
<a href='#' onclick='document.optimize.submit()'>Optimize Database</a>";

OR if it's really important that this doesn't get submitted twice (by someone clicking refresh and saying yes to post data resubmission), I'd do it as you're doing it and at the end of the script have that redirect back with a header("location:test.php").

You can't echo anything before a redirect, so if you want a popup, send a flag header("location:test.php?flag=done") and do it when you come back.

if (isset($POST['flag']) && $POST['flag'] == "done"){
echo popup...
}