jQuery and MySQL - php

Question

I have taken a jQuery script which would remove divs on a click, but I want to implement deleting records of a MySQL database. In the delete.php:
<?php
$photo_id = $_POST['id'];
$sql = "DELETE FROM photos
WHERE id = '" . $photo_id . "'";
$result = mysql_query($sql) or die(mysql_error());
?>
The jQuery script:
$(document).ready(function() {
$('#load').hide();
});
$(function() {
$(".delete").click(function() {
$('#load').fadeIn();
var commentContainer = $(this).parent();
var id = $(this).attr("id");
var string = 'id='+ id ;
$.ajax({
type: "POST",
url: "delete.php",
data: string,
cache: false,
success: function(){
commentContainer.slideUp('slow', function() {$("#photo-" + id).remove();});
$('#load').fadeOut();
}
});
return false;
});
});
The div goes away when I click on it, but then after I refresh the page, it appears again...
How do I get it to delete it from the database?
EDIT: Woopsie... forgot to add the db.php to it, so it works now >.<

Answer 1

There's no way the php could even come close to working. Where is the database? Check out http://www.php.net/manual/en/mysql.examples-basic.php from which you can see there's more to the database than just a query.
<?php
// Connecting, selecting database
$link = mysql_connect('mysql_host', 'mysql_user', 'mysql_password')
or die('Could not connect: ' . mysql_error());
echo 'Connected successfully';
mysql_select_db('my_database') or die('Could not select database');
// Performing SQL query
$query = 'SELECT * FROM my_table';
$result = mysql_query($query) or die('Query failed: ' . mysql_error());
// Printing results in HTML
echo "<table>\n";
while ($line = mysql_fetch_array($result, MYSQL_ASSOC)) {
echo "\t<tr>\n";
foreach ($line as $col_value) {
echo "\t\t<td>$col_value</td>\n";
}
echo "\t</tr>\n";
}
echo "</table>\n";
// Free resultset
mysql_free_result($result);
// Closing connection
mysql_close($link);
?>

Answer 2

You have your data as a GET string, but you are using a POST request, try changing your string variable to an object. Like :
$(document).ready(function() {
$('#load').hide();
});
$(function() {
$(".delete").click(function() {
$('#load').fadeIn();
var commentContainer = $(this).parent();
var id = $(this).attr("id");
var string = { id : id };
$.ajax({
type: "POST",
url: "delete.php",
data: string,
cache: false,
success: function(){
commentContainer.slideUp('slow', function() {$("#photo-" + id).remove();});
$('#load').fadeOut();
}
});
return false;
});
});
Plus I am hoping you are preparing your MySQL connection properly in your PHP, you cannot just call mysql_query and hope it will know which database you mean, and how to connect to it by itself :)
Look at #Quotidian answer! :)