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thank you very much

Just found out that doing unlink(__FILE__) will delete the file you're in, and will cause no errors.

@ just supresses any errors so they're unaware that you're mailing yourself if it goes wrong.

You can't delete the file you're using (i.e the one you're mailing from) but you can delete every other file if you know their filename in relation to that using unlink.

unlink(dirname(__FILE__) . '/otherfile.php');

As for getting past not being able to delete the current file, just make it create a file like I said to do to stop it constantly mailing and do

if(file_exists('path/to/file')) die();

Only thing I can think of atm is making it either connecting to a remote db, or sending an email to you with the request url to find the script. So for example:

$server = $_SERVER['SERVER_NAME'];
if($server != 'localhost') # You don't want to send anything if it's their localhost
{
    $url = 'http://' . $server. $_SERVER['REQUEST_URI']; #Eg http://theirsite.com/index.php
    @mail('myemailaddress@host.com', 'Your script was used!', 'Your script <script name> was used at the following address "' . $url . '"', 'From:scriptchecker@host.com\n\r');
}

That script isn't perfect, as they may not be allowed to mail if they use a free webhost. Or if mail is not configured. Also it will only send if it run, not when uploaded. Also it will send an email everytime. So you might want to make it generate a file on their server. And it checks if that file was made before it sends an email, or adds an entry to your db.

thanks, what the difference between @mail() and mail()? after knowing the url, I want to delete the uploaded files that I give, is it possible?

Only thing I can think of atm is making it either connecting to a remote db, or sending an email to you with the request url to find the script. So for example:

$server = $_SERVER['SERVER_NAME'];
if($server != 'localhost') # You don't want to send anything if it's their localhost
{
    $url = 'http://' . $server. $_SERVER['REQUEST_URI']; #Eg http://theirsite.com/index.php
    @mail('myemailaddress@host.com', 'Your script was used!', 'Your script <script name> was used at the following address "' . $url . '"', 'From:scriptchecker@host.com\n\r');
}

That script isn't perfect, as they may not be allowed to mail if they use a free webhost. Or if mail is not configured. Also it will only send if it run, not when uploaded. Also it will send an email everytime. So you might want to make it generate a file on their server. And it checks if that file was made before it sends an email, or adds an entry to your db.

I give a php script to my friend then I want to know the url if he upload it. is it possible? what will I put in the script that I will give?
could you please help me?

THANKS MILLION TRILLION

TBH The select box can be populated with php like so

<?php

//$result is a result set made by a previous query. With two fields, id and category_name

$select = "<select id='my_ajax_select'>";

while($row = mysql_fetch_assoc($result))
{
   $select .= "<option value=\"{$row['id']}\">{$row['category_name']}</option>";
}
$select .= "</select>";

echo $select;
?>

Then the ajax you just need to use an onchange.

Code:

window.onload = function()
{
    var select = document.getElementById('my_ajax_select');
    select.onchange = function()
    {
       var id = select.value;
       //make request object, make params out of the id variable to request correct category info etc.
       request.onreadystatechange = function()
       {
               if(request.readyState == 4)
               {
                     //populate w/e with returned data.
               }
       }
    }
}

 i dont know how to do it in ajax.

so need any tutorial as i searhed but didnt got it..

Have you tried to do it, or are you expecting someone to do it for you? Post your code if have something that is not working so we people can help if they able to.