More efficient way of inserting using PDO? - php

Hi I am inserting image data into a database each time an image is uploaded to my server. The code I am using looks a bit 'chunky' especially the binds. Can it be done differently to reduce the amount of text and execute more quickly or should I not worry about it?
Here is the code I am using:
function($file_name, $cat, $year, $desc, $title, $image_size, $image_width, $image_height){
//test the connection
try {
//connect to the database
$dbh = new PDO("mysql:host=localhost;dbname=mjbox","root", "usbw");
//if there is an error catch it here
} catch( PDOException $e ) {
//display the error
echo $e->getMessage();
}
$stmt = $dbh->prepare("INSERT INTO mjbox_images(img_file_name,img_cat,
img_year,img_desc,img_title,img_size,img_width,img_height)
VALUES(?,?,?,?,?,?,?,?)");
$stmt->bindParam(1,$file_name);
$stmt->bindParam(2,$cat);
$stmt->bindParam(3,$year);
$stmt->bindParam(4,$desc);
$stmt->bindParam(5,$title);
$stmt->bindParam(6,$image_size);
$stmt->bindParam(7,$image_width);
$stmt->bindParam(8,$image_height);
$stmt->execute();
}

Depending on how much code you want to rewrite, you could always swap from using pure PDO to something like RedBean (which is actually quite nice, being a zero-config ORM).
http://www.redbeanphp.com/
Worth a look, even if you won't use it now; it's definitely a great tool.
Inserts would then take just modifying bean properties, reducing the overall amount of code you'd use.

You could do it like this, passing an array of values and use the keys as place holders, that way you can use the same function to insert into different tables:
<?php
$insert = array('img_file_name'=>'',
'img_cat'=>'',
'img_year'=>'',
'img_desc'=>'',
'img_title'=>'',
'img_size'=>'',
'img_width'=>'',
'img_height'=>'');
insert('mjbox_images',$insert);
function insert($table,$values=array()){
//test the connection
try{
//connect to the database
$dbh = new PDO("mysql:host=localhost;dbname=mjbox","root", "usbw");
//if there is an error catch it here
} catch( PDOException $e ) {
//display the error
echo $e->getMessage();
}
$fieldnames = array_keys($values);
$sql = "INSERT INTO $table";
$fields = '( ' . implode(' ,', $fieldnames) . ' )';
$bound = '(:' . implode(', :', $fieldnames) . ' )';
$sql .= $fields.' VALUES '.$bound;
$stmt = $dbh->prepare($sql);
$stmt->execute($values);// whoops
}
//INSERT INTO mjbox_images( img_file_name ,img_cat ,img_year ,img_desc ,img_title ,img_size ,img_width ,img_height ) VALUES (:img_file_name, :img_cat, :img_year, :img_desc, :img_title, :img_size, :img_width, :img_height )
?>

Related

php/pdo insert into database mssql with arrays

I need some help
Is there a way to make this in PDO? https://stackoverflow.com/a/1899508/6208408
Yes I know I could change to mysql but I use a mssql server and can't use mysql. I tried some things but I'm not as good with PDO as mysql... It's hard to find some good examples of inserting array's into database with PDO. So quickly said I have a PDO based code connected to a mssql webserver.
best regards joep
I tried this before:
//id
$com_id = $_POST['com_id'];
//array
$mon_barcode = $_POST['mon_barcode'];
$mon_merk = $_POST['mon_merk'];
$mon_type = $_POST['mon_type'];
$mon_inch = $_POST['mon_inch'];
$mon_a_date = $_POST['mon_a_date'];
$mon_a_prijs = $_POST['mon_a_prijs'];
$data = array_merge($mon_barcode, $mon_merk, $mon_type, $mon_inch, $mon_a_date, $mon_a_prijs);
try{
$sql = "INSERT INTO IA_Monitor (Com_ID, Barcode, Merk, Type, Inch, Aanschaf_dat, Aanschaf_waarde) VALUES (?,?,?,?,?,?,?)";
$insertData = array();
foreach($_POST['mon_barcode'] as $i => $barcode)
{
$insertData[] = $barcode;
}
if (!empty($insertData))
{
implode(', ', $insertData);
$stmt = $conn->prepare($sql);
$stmt->execute($insertData);
}
}catch(PDOException $e){
echo $sql . "<br>" . $e->getMessage();
}
$conn = null;
The code below should fix your problems.
$db_username='';
$db_password='';
$conn = new \PDO("sqlsrv:Server=localhost,1521;Database=testdb", $db_username, $db_password,[]);
//above added per #YourCommonSense's request to provide a complete example to a code fragment
if (isset($_POST['com_id'])) { //was com_id posted?
//id
$com_id = $_POST['com_id'];
//array
$mon_barcode = $_POST['mon_barcode'];
$mon_merk = $_POST['mon_merk'];
$mon_type = $_POST['mon_type'];
$mon_inch = $_POST['mon_inch'];
$mon_a_date = $_POST['mon_a_date'];
$mon_a_prijs = $_POST['mon_a_prijs'];
$sql = "INSERT INTO IA_Monitor (Com_ID, Barcode, Merk, Type, Inch, Aanschaf_dat, Aanschaf_waarde) VALUES (?,?,?,?,?,?,?)";
try {
$stmt = $conn->prepare($sql);
foreach ($mon_barcode as $i => $barcode) {
$stmt->execute([$com_id, $barcode, $mon_merk[$i], $mon_type[$i], $mon_inch[$i], $mon_a_date[$i], $mon_a_prijs[$i]]);
}
} catch (\PDOException $e) {
echo $sql . "<br>" . $e->getMessage();
}
}
$conn = null;

Stuck at making a database insert class function

Iam trying to make a OOP based forum in PHP and currently im stuck at making the Database class. Specifically Iam stuck at making a "general purpose" insert class function for the Datatable class (using PDO btw).
class DB
{
private $dbconn;
public function __construct(){
}
protected function connect($dbname, $dbhost='127.0.0.1', $dbuser='root', $dbpass=''){
try{
$this->dbconn = new PDO("mysql:host=$dbhost;dbname=$dbname;", $dbuser, $dbpass, array(PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES 'UTF8'"));
}
catch(PDOException $e){
echo 'Connection failed: '.$e->getMessage()."<br />";
}
}
protected function disconnect(){
$this->dbconn = null;
}
public function insert($dbname, ){
$this->connect($dbname);
try{
# prepare
$sql = "INSERT INTO pdodemotable (firstname, lastname, age, reg_date)
VALUES (?, ?, ?, now())";
$stmt = $dbconn->prepare($sql);
# the data we want to insert
$data = array($firstname, $lastname, $age);
# execute width array-parameter
$stmt->execute($data);
echo "New record created successfully";
}
catch(PDOException $e){
echo $sql . "<br>" . $e->getMessage();
}
}
}
The insert function is as you see unfinished. I cant figure out how to get the insert function to adapt to ANY amount of arguments, ANY amount of database columns and ANY table. The code thats in the function right now is taken from one of my other projects where I used procedural programming. Its by first time using OOP with Databases.
Im a newbie to both OOP and PDO. There must be some sort of method or function that could help me that Im missing. The only solution I see right now is to use a ridicoulus amount of string handling and if statement... it cant be the best solution... there must be a easier way...
First notice - you don't need the $dbname parameter for insert method, instead it should be a constructor parameter:
class DB {
private $dbconn;
public function __construct($dbname, $dbhost='127.0.0.1', $dbuser='root', $dbpass='') {
// also don't catch the error here, let it propagate, you will clearly see
// what happend from the original exception message
$this->dbconn = new PDO("mysql:host=$dbhost;dbname=$dbname;", $dbuser, $dbpass, array(PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES 'UTF8'"));
}
...
}
As for the insert method - first try to imagine how it will be used.
For example, it can be like this:
$db = new DB('mydb');
$db->insert('mytable', array('firstname'=>'Pete', 'lastname'=>'Smith'));
Then you can pass the table name and data (keys/values) into the method:
public function insert($table, $data) {
// again, no need to try / catch here, let the exceptions
// do their job
// handle errors only in the case you are going to fix them
// and not just to ingnore them and 'echo', this can lead to much worse problems
// see the explanation below regarding the `backtick` method
$table = $this->backtick($table);
$fields = array();
$placeholders = array();
$values = array();
foreach($data as $key=>$value) {
$fields[] = $this->backtick($key);
// you can also process some special values like 'now()' here
$placeholders[] = '?';
}
$fields = implode($fields, ','); // firstname, lastname
$placeholders = implode($placeholders, ','); // ?, ?
$sql = "INSERT INTO $table ($fields) values ($placeholders)";
$stmt = $this->dbconn->prepare($sql);
$stmt->execute(array_values($data));
}
public function update($table, $id, $data) {
$table = $this->backtick($table);
$fields = array();
foreach($data as $key=>$value) {
$fields[] = $this->backtick($key) . " = ?";
}
$fields = implode($fields, ','); // firstname=?, lastname=?
$sql = "UPDATE $table SET $fields where id=?";
$stmt = $this->dbconn->prepare($sql);
$data['id'] = $id;
$stmt->execute(array_values($data));
if ($stmt->execute(array_values($data)) === false) {
print 'Error: ' . json_encode($stmt->errorInfo()). PHP_EOL;
}
while ($row = $stmt->fetchAll()) {
print json_encode($row) . PHP_EOL;
}
}
private function backtick($key) {
return "`".str_replace("`","``",$key)."`";
}
Another alternative is to create the separate object which will represent one table row (the ActiveRecord pattern).
The code which uses such object could look like this:
$person = new Person($db);
$person->firstName = 'Pete';
$person->lastName = 'Smith';
$person->save(); // insert or update the table row
Update on possible SQL injection vulnerability
I also added the update and backtick methods to illustrate the possible SQL injection.
Without the backtick, it is possible that update will be called with something like this:
$db->updateUnsafe('users', 2, array(
"name=(SELECT'bad guy')WHERE`id`=1#"=>'',
'name'=>'user2', 'password'=>'text'));
Which will lead to the SQL statement like this:
UPDATE users SET name=(SELECT'bad guy')WHERE`id`=1# = ?,name = ?,password = ? where id=?
So instead of updating the data for user with id 2, we it will change the name for the user with id 1.
Due to backtick method, the statement above will fail with Unknown column 'name=(SELECT'bad guy')WHEREid=2#' in 'field list'.
Here is the full code of my test.
Anyway, this probably will not protect you from any possible SQL injection, so the it is much better not to use the user input for known parameters like table name and field names.
Instead of doing something like $db->insert('mytable', $_POST), do $db->insert('mytable', array('first'=>$_POST['first'])).
Try to pass the arguments has an array, then, inside the method insert, do a foreach.
Something like:
$data['first_name'] = 'your name';
...
$data['twentieth_name'] = 'twentieth name';
foreach( $data as $key => $value )
$final_array[':'.$key] = $value;
$stmt->execute( $final_array );

PDO_OCI - into a clob field

I want to insert some base64 encoded data (up to 500.000 characters per field) in an Oracle DB.
Since i havn't used Oracle with PHP before i started using PDO and set fields to CLOB.
Shortversion of my code (class Db extends \PDO):
<?php
[..snip..]
$dbh = new Db( "oci:dbname=" . DB_TNS, DB_USER, DB_PASS );
$Query = ' INSERT INTO "SENTINEL"."SYSTEM_ERRORS"
( BACKTRACE )
VALUES
( :backtrace )
';
$stmt = $dbh->db_prepare( $Query );
$stmt->bindParam( ':backtrace', $backtrace, \PDO::PARAM_LOB );
$backtrace = $someobject->get_backtrace();
$stmt->execute();
print_r($stmt->errorInfo());
$stmt->closeCursor();
I get:
Array ( [0] => HY000 [1] => 932 [2] => OCIStmtExecute: ORA-00932: Inkonsistente Datentypen: CLOB erwartet, BLOB erhalten (ext\pdo_oci\oci_statement.c:148) )
Anyone know how to solve that with PDO, so i don't have to use the oci driver?
I have found a solution here:
https://bugs.php.net/bug.php?id=57095
[2009-08-11 11:27 UTC] lehresman at gmail dot com
wrote:
A coworker discovered the solution. When dealing with CLOBs in Oracle using PDO,
don't treat it as a LOB. You need to bind it as a PDO::PARAM_STR, and give it the
length of the string (that 4th parameter is the key, it fails with an error message
about LONG type otherwise).
Here is an example of how to successfully insert into a CLOB in Oracle:
<?php
/*
CREATE TABLE clob_test (my_clob CLOB)
*/
$big_string = "";
for ($i=0; $i < 10000; $i++)
$big_string .= rand(100000,999999)."\n";
try {
$pdo = new PDO("oci:dbname=TESTDB", "TESTUSER", "TESTPW");
$stmt = $pdo->prepare("INSERT INTO healthbit.clob_test (my_clob) VALUES (:cl)");
$stmt->bindParam(":cl", $big_string, PDO::PARAM_STR, strlen($big_string));
$pdo->beginTransaction();
if (!$stmt->execute()) {
echo "ERROR: ".print_r($stmt->errorInfo())."\n";
$pdo->rollBack();
exit;
}
$pdo->commit();
$stmt = $pdo->prepare("SELECT my_clob FROM healthbit.clob_test");
$stmt->execute();
$row = $stmt->fetch();
$str = "";
while ($tmp = fread($row[0],1024))
$str .= $tmp;
echo strlen($str); // prints 70000
} catch (Exception $e) {
echo "ERROR: ";
echo $e->getMessage();
$pdo->rollBack();
}
Works perfectly fine for me...

mysqli update not updating although no error

I am trying to adapt my code, which works in a SELECT, to perform an UPDATE. Here, there is no error, but it does not update anything, it even does not even enter the loop. It is supposed to update the room type for the chosen days ($value).
I echoed all values to check them up and they are correct.
$bdd = mysqli_connect('localhost', 'root', '', 'webpage')
$roomty = 1;
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
}
foreach ($_SESSION['datesBooked_1_month'] as $key => $value)
{
$stmt = mysqli_stmt_init($bdd);
if ( mysqli_stmt_prepare( $stmt , "UPDATE '".$_SESSION['tab_from_month_year']."'
SET '".$_SESSION['roomtype_x']."'='".$_SESSION['roomtype_x']."' + ? WHERE day = ?"))
{
mysqli_stmt_bind_param( $stmt ,'is', $roomty , $value );
mysqli_stmt_execute( $stmt );
mysqli_stmt_close($stmt);
echo " Booked !<br /> ";
}
}
Please try the following code with the new MySql driver of PHP.
you put the quote for a integer value, that is wrong
do you named column with numbers? That is not comfortable.
Are you sure that $value is a string?
Why did you use $key => $value in the foreach loop?
Here the code:
/* Connect to an ODBC database using driver invocation */
$dsn = 'mysql:dbname=webpage;host=127.0.0.1';
$user = 'root';
$password = 'dbpass'; #put here yor password
try {
$dbh = new PDO($dsn, $user, $password);
} catch (PDOException $e) {
echo 'Connection failed: ' . $e->getMessage();
}
foreach $_SESSION['datesBooked_1_month'] as $value) {
#I hope that following variables don't contain space
$query = "UPDATE " .$_SESSION['tab_from_month_year'];
$temp = $_SESSION['roomtype_x'] + $roomty ;
#you wrote that $value is a string, are you sure?
$query .= " SET ".$_SESSION['roomtype_x']. "=$temp WHERE day='$value'" ;
$dbh->query($query);
}
I found out, the problem was the single quotes before the double quotes. It seems to be working very well with only double quotes like this :
if ( mysqli_stmt_prepare( $stmt , "UPDATE ".$_SESSION['tab_from_month_year']." SET ".$_SESSION['roomtype_x']." = ".$_SESSION['roomtype_x']." + ? WHERE day = ?"))
If this is the full code you need to select a database, currently the statement is being sent to the server but not to any database, there for you get no errors. You should use:
mysqli_select_db("You database goes here");

Insert data to mysql doesn't work from php

I have the following PHP code:
if($_SERVER['REQUEST_METHOD'] == 'POST')
{
$insert_query = mysql_query("INSERT INTO articles(articleTitle, articleContent, typeID)
VALUES
('$_POST[articleTitle]','$_POST[articleContent]',$_POST[articleType])");
}
typeID => is number, the other values are text.
There is no error in this code, but the insert query doesn't work (I have no idea why because I don't get any error message).
How can I fix it?
There are a number of problems with your code.
It's open to SQL injectoion
mysql_* functions have been deprecated
This code is untested but should give you an idea:
try
$dbh = new PDO('mysql:host=localhost;dbname=your_database_name', $user, $password);
$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$sth = $dbh->prepare('INSERT INTO Persons (articleTitle, articleContent, typeID) VALUES (:articleTitle, :articleContent, :articleType)');
$sth->execute($_POST);
$dbh = null;
} catch (PDOException $e) {
print "Error!: " . $e->getMessage() . "<br/>";
}
Have a look at this article on Why you Should be using PHP’s PDO for Database Access
Try this
if(isset($_POST[articleTitle])) {
$insert_query = mysqli_query("INSERT INTO Persons (articleTitle, articleContent,typeID)
VALUES
('$_POST[articleTitle]','$_POST[articleContent]',$_POST[articleType])");
}

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