I'am currently working on a project and want to make a simple page where I can edit groups. I had everything working fine in XAMPP and tried uploading it to the server, but it won't affect any rows in the database.This is the statement:
UPDATE user_groups
SET name = 'TEST',
name_short = 'test',
color = 'green',
category = 'MMORPG'
WHERE id = 2
and:
Affected rows (UPDATE): 0
Is the answer. Creating new groups works fine (Local creating and editing works and I did not change anything in the statements since I uploaded both)
This is what the row looks like that I am trying to affect
EDIT:
$sql_update_info = "UPDATE user_groups SET name = '$new_title', name_short = '$new_short', color = '$new_color', category = '$new_cat' WHERE id = $group_id";
$query_update_info = mysqli_query($mysqli, $sql_update_info);
printf("Affected rows (UPDATE): %d\n", mysqli_affected_rows($mysqli));
echo '<br><span style="color:white;">'.$sql_update_info.'</span>';
Is what the PHP part looks like when clicked on the button.
1st : Try to use prepared statement to avoid sql injection.
2nd : Execute() will return true or false so based on that you need to handle the error like below.
$stmt = $mysqli->prepare("UPDATE user_groups SET name = ?, name_short = ?, color = ?, category = ? WHERE id = ?");
$stmt->bind_param('ssssi', $new_title, $new_short, $new_color, $new_cat, $group_id);
//The argument may be one of four types:
//i - integer
//d - double
//s - string
//b - BLOB
//change it by respectively
$r = $stmt->execute();
if(!$r){
echo $stmt->error;
}else{
$row_count= $stmt->affected_rows;
}
$stmt->close();
$mysqli->close();
Related
My problem is that:
I have a users table in MySQL. I made a query with MySQLi which looks like:
if($stmt = $mysqli->prepare("SELECT condition,name,money FROM users WHERE fbid = ?")){
$stmt->bind_param('s',$_SESSION['FBID']);
$stmt->execute();
$stmt->store_result();
$num_of_rows = $stmt->num_rows;
$stmt->bind_result($condition,$name,$money);
while ($stmt->fetch()) {
And here's my problem, because I want different users to add equal usernames to their ids. So, my code is the following:
if($_GET['name']!='' && $money>'500'){
$stmt2 = $mysqli->prepare("UPDATE users SET `condition` = `condition` + 5, `money` = `money` - 5 WHERE fbid = ? AND name = ?");
$stmt2->bind_param("ss", $_SESSION['FBID'],$_GET['name']);
$stmt2->execute();
$stmt2->close();
I want to update only that value in the database where user ID = $_SESSION[fbid] and name = $_GET[name]. So if I have an account with id 1922838445 and I have three names, for example, John, Joe, and Jill and $_GET[name]=='Joe' then update only that value at the same ids. It works until that point that update only the got value, but it does that 3 times... Because of while () maybe??? How can I fix it?
The two code samples have to come one after!! Because of checking the value of money..
There's no need for the first SELECT and the loop, just put the condition on money into the UPDATE query itself.
if ($_GET['name'] != '') {
$stmt = $mysqli->prepare("
UPDATE users
SET condition = condition + 5, money = money - 5
WHERE fbid = ? AND name = ?
AND money > 500")
$stmt->bind_param("ss", $_SESSION['FBID'], $_GET['name']);
$stmt->execute();
}
Try this instead to get only one record:
It gets only the record you need because it has a WHERE clause on both parameters that you plan to update, instead of only a partial match on the fbid like you had before.
Before you were getting 3 records because you had a partial key search, then looping through the records and updating the same record over and over against, regardless of the value of the second part of the key in the record you were looping against.
if($stmt = $mysqli->prepare("SELECT condition,name,money FROM users WHERE fbid = ? AND name = ?")){
$stmt->bind_param("ss", $_SESSION['FBID'],$_GET['name']);
$stmt->execute();
I have a really simple procedure I need to do, and no matter how much I debug or simplify, the record is not updating in the dbase. Assume everything is correct in terms of connection, etc. Pulling this from php and doing a MySQL call in PHPMyAdmin results in a correct record update on the table. I've tried using/not using quotes around adminId.
Any ideas?
$sampleString = "343r34c3cc43";
//Need to store the customer ID from sub system
$stmt2 = $mysqli->prepare("
UPDATE
admins
SET
chargebeeId = '?'
WHERE
adminId='22'
");
$stmt2->bind_param('s',
$mysqli->real_escape_string($sampleString)
);
$stmt2->execute();
For reference, adminId will be dynamic, with a bind_param 'i' in the application.
change this
chargebeeId = '?'
to
chargebeeId = ?
try this
$sampleString = "343r34c3cc43";
$sampleString = $mysqli->real_escape_string($sampleString) ;
$stmt2 = $mysqli->prepare("UPDATE admins
SET chargebeeId = ?
WHERE adminId='22' ");
$stmt2->bind_param('s', $sampleString);
$stmt2->execute();
I am using the following to update a table in my db with various values (I have shortened this example to two). Given an array of users ($user_set) I check to see if settings for the user exist... if they do I update the users row... if they do not then I create a row for the user.
The code below works fine, however, I need to return an array of the rows I just changed so I can update the page display with js.
Essentially what I want to do is $result_array[] = $stmt->execute($binding); (all values of the row updated/inserted)
This way I could echo json_encode($result_array); and have an array of all rows I just updated/inserted for use with js.
Is something like this possible or will I need to create the array on my own in php to return?
<?php
//set bindings
$binding = array(
'one' => $settings['one'],
'two' => $settings['two'],
'user_id' => $user['user_id']
);
foreach($user_set as $key)
{
// check if program settings exist or not
$stmt = $db->prepare("SELECT * FROM settings WHERE user_id = ?");
$stmt->execute(array($key['user_id']));
// program_settings result is
$result = $stmt->fetch(PDO::FETCH_ASSOC);
// if result then settings exist and update... if not insert one
if($result)
{
//prepare update statement
$stmt = $db->prepare("UPDATE settings SET one = :one, two = :two WHERE user_id = :user_id");
}
else
{
//prepare insert statement
$stmt = $db->prepare("INSERT INTO settings (user_id, one, two) VALUES (:user_id, :one, :two)");
}
//set comp id
$binding['user_id'] = $key['user_id'];
// execute the update
$stmt->execute($binding);
}
?>
After you use a stmt->execute(); to execute some sql, you can use stmt->fetchAll(); to take all of the rows that has been affected by your sql statement.
I try to make prepared statament using pdo. It is possible to put several updates atonce?
Ex:
sql1 = "Update product set large = '1large' where id = 1";
sql2 = "Update product set large = '2large' where id = 2";
sql3 = "Update product set large = '3large' where id = 3";
How to prepare sql1,sql2....sqlN in Pdo to execute faster?
I found an example but it works line by line (sql1, sql2 ....)
<?php
$stmt = $dbh->prepare("UPDATE product SET large = ':large' WHERE id = ':id'");
$stmt->bindParam(':id', $id, PDO::PARAM_STR);
$stmt->bindParam(':large', $large, PDO::PARAM_STR);
$stmt->execute();
?>
Unlike inserts, which can be grouped into a single statement, updates are specific to an existing entry in the database.
Dependant on the broader context of what you are doing you may find a question like this of interest for bulk updates using CASE, WHEN, THEN:
Question: Update multiple rows with one query?
I should have made such that it is +1 up database instance every time you write a status on its away
problem: right now when writing +1 then the whole time 1
solved: this is how I want when I have 1 point in advance so it must just above the old numbers thus making it for 2 and 3, etc.
if ($stmt = $this->mysqli->prepare('UPDATE bruger SET point=? WHERE id=?')) {
$stmt->bind_param('si', $point, $id);
$point = +1;
$id = $_SESSION["id"];
$stmt->execute();
$stmt->close();
}
You should either do a select query first, then add 1 using PHP and then do an update query, or change the update query so that it automatically adds 1 without using PHP, which is better.
Changing the query would result in the following code:
if ($stmt = $this->mysqli->prepare('UPDATE bruger SET point=point + 1 WHERE id=?')) {
$stmt->bind_param('si', $id);
$id = $_SESSION["id"];
$stmt->execute();
$stmt->close();
}