PDO How to echo how many updated - php

How can I echo how many records were updated with this code?
I know that I can do this in a common update:
echo $stmt->rowCount() . " records UPDATED successfully";
But the question here is, how to do it when there is multiple updates at the same time.
NOTE ABOUT POSSIBLE DUPLICATE: I already have explained that my question is different than: PDO were rows affected during execute statement
That solution is for a single update and it does not work in this code. What I ask is how to count when there is multiple updates.
try {
require_once 'connexion.php';
$stmt = $conn->prepare("UPDATE bookmarks
SET podcast=:podcast, text=:text
WHERE id=:id");
$stmt->bindParam(':podcast', $podcast);
$stmt->bindParam(':text', $text);
$stmt->bindParam(':id', $id);
$podcast = 1;
$text = "text 1";
$id = 147;
$stmt->execute();
// another row:
$podcast = 2;
$text = "text 2";
$id = 265;
$stmt->execute();
// echo " records UPDATED successfully";
}
catch(PDOException $e){
echo $e->getMessage();
}

Try this.
As you are doing multiple ->execute() you will have to capture the count of each ->execute() as you do it and then show the accumulated total count at the end
try {
require_once 'connexion.php';
$update_count = 0;
$stmt = $conn->prepare("UPDATE bookmarks
SET podcast=:podcast, text=:text
WHERE id=:id");
$stmt->bindParam(':podcast', $podcast);
$stmt->bindParam(':text', $text);
$stmt->bindParam(':id', $id);
$podcast = 1;
$text = "text 1";
$id = 147;
$stmt->execute();
$update_count += $stmt->rowCount();
// another row:
$podcast = 2;
$text = "text 2";
$id = 265;
$stmt->execute();
$update_count += $stmt->rowCount();
echo "$update_count records UPDATED successfully";
}
catch(PDOException $e){
echo $e->getMessage();
}

Try $stm->rowCount(). Source here: http://php.net/manual/en/pdostatement.rowcount.php
The question was already asked here as well: https://stackoverflow.com/a/10522575/2853903

Related

No Update done with PDO php

I have problem without any error in my code that update row ..
if(!isset($error)){
try {
$sql = "UPDATE `invoice` SET `client`='".$client."', `company`='".$company."' , `clientemail`='".$clientemail."' , `mobailclient`='".$mobailclient."' , `startdate`='".$startdate."' , `enddate`='".$enddate."' WHERE `id` ='".$id."'";
$count = $db->exec($sql);
//redirect to invoice page
header('Location: invoice.php');
exit;
//else catch the exception and show the error.
} catch(PDOException $e) {
$error[] = $e->getMessage();
}
}
This is my code , i try to get variable $sql and go to mysql phpmyadmin and its work good ,, but in file not work and i dont get any error
==== Update ====
i try this and not work
try {
$sql = 'UPDATE invoice SET client = :client, company = :company, clientemail = :clientemail, mobailclient = :mobailclient, startdate = :startdate, enddate = :enddate WHERE id = :id';
$statement = $db->prepare($sql);
$statement->bindParam(":client", $client);
$statement->bindParam(":company", $company);
$statement->bindParam(":clientemail", $clientemail);
$statement->bindParam(":mobailclient", $mobailclient);
$statement->bindParam(":startdate", $startdate);
$statement->bindParam(":enddate", $enddate);
$statement->bindParam(":id", intval($_GET['id']) );
$statement->execute();
if($statement->rowCount() > 0) // will return 1 if any row is updated
{
echo "<script>alert('".$statement->rowCount()."')</script>";
}
else
{
echo "<script>alert('No record updated')</script>";
}
Your query is opened for SQL Injection. You should use parameterized query which provide a kind of protection against SQL injection but will not provide 100% of protection. Kindly visit this Post for more details.
Try the following code by replacing table and column names.
$client = "my name";
$company = "my-company";
$id= 2;//make sure your table has a record with that specific id
$sql = 'UPDATE invoice SET client = :client, company = :company WHERE id = :id'; // here i am updating only two columns
//You can add more column that you want to upate like ColumnName = :ParameterIdentifier
//Where ParameterIdentifier Is the name of parameter used in bindParam as in my example company
$statement = $db->prepare($sql);
$statement->bindParam("client", $client); //Binding parameter for client
$statement->bindParam("company", $company); //Binding parameter for company
$statement->bindParam("id", $id);
$statement->execute();
if($statement->rowCount() > 0) // will return 1 if any row is updated
{
echo "Record updated successfully";
}
else
{
echo "No record updated";
}

Update one database table column with different values

I want to update table with max three value and minimum with two values.How it would be possible to update table. I Get values from form, there are three fields for three students. Now all of them having same value when i update them in the database. Now i am trying this why. Dont know it works or not
See my page
$s1_name=$_POST['s1_name'];
$s2_name=$_POST['s2_name'];
$s3_name=$_POST['s3_name'];
$query="update students SET Name=:Name
WHERE ProjectID='$id'
";
try
{
$stmt = $conn->prepare( $query );
$stmt->bindParam(':Name', $s1_name);
$stmt->bindParam(':Name', $s2_name);
$stmt->bindParam(':Name', $s3_name);
$result = $stmt->execute();
$msg = "Record updated";
}
catch(PDOException $ex)
{
$msg = $ex -> getMessage();
}
}
It does not work this way. The way you are doing it will result in the query only updating it for $s3_name.
You will have to do your try/catch statement for each query:
<?php
$names = [$_POST['s1_name'], $_POST['s2_name'], $_POST['s3_name']];
$query = "update students SET Name=:Name WHERE ProjectID='$id'";
foreach ($names as $name) {
try
{
$stmt = $conn->prepare($query);
$stmt->bindParam(':Name', $name);
$result = $stmt->execute();
$msg = "Record updated";
}
catch(PDOException $ex)
{
$msg = $ex -> getMessage();
}
}

How to delete and update using php

Hello guys I have been trying to delete a file using php and I want it to delete the main post, reply's and like then update to the author -10 in his/her point.
Here is my code, using PDO:
<?php session_start();
if(isset($_POST['id'])){
include($root . 'dbconn.php');
$form = $_POST;
$id = $form['id'];
try {
$db_conn = new PDO('mysql:host='.DB_HOST.';dbname='.DB_NAME,DB_USERNAME,DB_PASSWORD);
$db_conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$stmt = $db_conn->prepare("DELETE FROM code WHERE cid= {$id}");
$stmt = $db_conn->prepare("DELETE FROM comment WHERE id = {$id}");
$stmt = $db_conn->prepare("DELETE FROM likes_map WHERE lid = {$id}");
$stmt = $db_conn->prepare("UPDATE users SET point -1 WHERE username = {$u}");
$stmt->bindParam(':id', $id);
$stmt->bindParam(':cid', $id);
$stmt->bindParam(':lid ', $id);
$stmt->bindParam(':u ', $_SESSION['username']);
$stmt->execute();
echo "deleted"
} catch(PDOException $e) {
echo "Error:" . $e->getMessage();
}
$db_conn = null;
}else{
echo "You are not allow to delete this";
}
?>
Your first problem is that you are preparing more than one query on the same statement handle and therefore loosing the link to that prepared statement when you prepare the next query.
You are also only executing the queries once and not once per statement!
Also your prepared sql statement do not have the parameters set with the correct syntax
It would also be a good idea to run this code inside a transaction, so if any update of the database fails you are not left with just bits of this process comepleted. This assumes the database is an INNODB database and not an MYISAM one, as transactions dont work on MYISAM
<?php
session_start();
if(!isset($_POST['id'])){
echo "You are not allow to delete this";
exit;
}
include($root . 'dbconn.php');
$form = $_POST;
$id = $form['id'];
try {
$db_conn = new PDO('mysql:host='.DB_HOST.';dbname='.DB_NAME,DB_USERNAME,DB_PASSWORD);
$db_conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
// start a transaction
$db_conn->beginTransaction();
$d_code = $db_conn->prepare("DELETE FROM code WHERE cid= :id");
$d_code->bindParam(':id', $id);
$d_comment = $db_conn->prepare("DELETE FROM comment WHERE id = :id");
$d_comment->bindParam(':id', $id);
$d_like = $db_conn->prepare("DELETE FROM likes_map WHERE lid = :id");
$d_like->bindParam(':id ', $id);
$u_user = $db_conn->prepare("UPDATE users SET point -1 WHERE username = :u");
$u_user->bindParam(':u ', $_SESSION['username']);
$d_code->execute();
$d_comment->execute();
$d_like->execute();
$u_user->execute();
$db_conn->commit();
echo "deleted";
} catch(PDOException $e) {
$db_conn->rollBack();
echo "Error:" . $e->getMessage();
}
$db_conn = null;
?>

saving multiple check-boxes as different records in php

Am trying to save the result of multiple check-boxes as separate records. my code is not functioning. please help!
<?php
session_start();
$id = $_SESSION['user_id'];
$db = new PDO('mysql:host=localhost;dbname=idp;charset=utf8','root', '');
foreach($_POST['comp'] as $val){
$tmp['user_id'] = $id;
$tmp['comp_id'] = $val;
$vars[] = $tmp;
}
$qry = "INSERT INTO compentency_result (user_id, result) VALUES (:user_id, :comp_id)";
try
{
$sql = $db->prepare($qry);
$numRows = 0;
foreach($vars as $insert){
$numRows += $sql->execute($insert);
}
print("<p>There were {$numRows} inserted into the database!</p>");
}
catch(PDOException $e)
{
print("<p>Oops! There was an issue - this is the message: {$e->getMessage()}</p>");
}
?>
The result is showing me that nothing is added to the database.
To bind the parameters individually you would do this:
try
{
$sql = $db->prepare($qry);
$numRows = 0;
foreach($vars as $insert){
$sql->bindParam(':user_id', $insert['user_id'], PDO::PARAM_STR);
$sql->bindParam(':comp_id', $insert['comp_id'], PDO::PARAM_STR);
$sql->execute();
$numRows += $sql->rowCount(); // get the rows affected this way
}
echo "<p>There were {$numRows} inserted into the database!</p>";
}
In addition, I added a more proper and reliable method of getting the affected rows, using rowCount().
If you don't want to bind the elements individually you can use execute() with an array as shown in Demystifying PDO

How to put PDO bindParam in if statement?

How to put PDO bindParam in if statement? I tried to do a different variations, but none of them worked.
function get_all_pages($subject_id, $public = true)
{
$db = new PDO('mysql:host=localhost;dbname=name;charset=utf8', 'root', 'whatewer');
$query = "SELECT * ";
$query.= "FROM pages ";
$query.= "WHERE subject_id =:id ";
if ($public)
{
$query.= " AND visible =:visible ";
}
$query.= "ORDER BY position ASC";
$query.= "ORDER BY position ASC";
$stmt = $db->prepare($query);
if ($public)
{
$stmt->bindParam(':id', $subject_id, PDO::PARAM_INT);
$stmt->bindValue(':visile', 2, PDO::PARAM_INT);
}
else
{
$stmt->bindParam(':id', $subject_id, PDO::PARAM_INT);
}
$stmt->execute();
$affected_rows = $stmt->rowCount();
if ($affected_rows == 1)
{
$subject = $stmt->fetch(PDO::FETCH_ASSOC);
return $subject;
}
}
else
{
return null;
}
}
Ok there was misunderstanding I got my cod "Wright" it was stackoverflow that messed my code up. i was struggling to put code in code area. In reality it looks like this.
http://imagizer.imageshack.us/v2/800x600q90/593/zvf8.png
$affected_rows = $stmt->rowCount(); might give you unexpected results as according to the manual:
For most databases, PDOStatement::rowCount() does not return the
number of rows affected by a SELECT statement.
You should fetch a row directly and see what the result is:
$stmt->execute();
if ($subject = $stmt->fetch(PDO::FETCH_ASSOC))
{
return $subject;
}
else
{
return null;
}
And I would recommend opening your database connection as I mentioned in my comment:
$db = new PDO('mysql:host=localhost;dbname=name;charset=utf8', 'root',
'whatewer', array(PDO::ATTR_ERRMODE => PDO::ERRMODE_WARNING));
That will cause PDO to throw exceptions and that will give you a clear error message whenever something goes wrong on any of the db calls.

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