Question

I have an old mysql code which I want to convert into PHP data object but I cant find on the web how this can be done, any help?

    $num = mysql_num_rows($result = mysql_query($query));

while($row = mysql_fetch_array($result))
  {

...
}

$query is a SELECT statement.

UPDATE:

My code is only showing the message “could not find driver” and notihng else, it isn’t showing form code or anything like that. What am i doing wrong in my PDO? I know database, hostname, username and password are correct so it should be able to show form and then let me connect to DB.

<?php

session_start(); 

$hostname = 'localhost';
$username="xxx";
$password="xxx";
$database="mobile_app";

try {
    $dbh = new PDO("mysql:host=$hostname;dbname=$database", $username, $password);


?>

,,, //Form Code is in here

<?php
if (isset($_POST['submit'])) {

$query = "
SELECT * FROM Teacher t  
WHERE 
(t.TeacherUsername = '".mysql_real_escape_string($teacherusername)."')
AND
(t.TeacherPassword = '".mysql_real_escape_string($teacherpassword)."')
";

$loged = false;

foreach ($dbh->query($sql) as $row)
  {

,,,, //results for each row



  }

 $dbh = null;

}

    }
catch(PDOException $e)
    {
    echo $e->getMessage();
    }
 ?>

Answer 1

try {
    $dbh = new PDO($dsn, $user, $password);
} catch (PDOException $e) {
    echo 'Connection failed: ' . $e->getMessage();
}

// PDOStatement is traversable, so you could use foreach.
foreach ($dbh->query($sql) as $row) {
  //...
}