Changing from mysqli to PDO did not work? - php

Question

I previously used mysqli and now i would like to use PDO instead but I did not echo any result from my database. I have read so many articles about PDO tutorial but they teach different things. I tried to pick piece by piece and came up with this code, but i did not echo any result from my database or throw any error.
try{
$stmt = $conn->query("SELECT * FROM memberpost ORDER BY poststart DESC LIMIT $start_from,$num_rec_per_page");
$stmt->setFetchMode(PDO::FETCH_ASSOC);
$row = $stmt->fetch();
if(count($row)>0){
while($row = $stmt->fetch()) {
echo $row['title']."<br>";
}
}
else{
echo "NO result found";
}
} catch(PDOException $e) {
echo 'ERROR: ' . $e->getMessage();
}
Here is my database connect code:
try {
$conn = new PDO('mysql:host=localhost;dbname=mydatabase;charset=utf8', $username, $password); //new PDO
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch(PDOException $e) {
echo 'ERROR: ' . $e->getMessage();
}

Answer 1

Edit your database connection code to this:
<?php
$dsn = 'mysql:dbname=testdb;host=127.0.0.1';
$user = 'dbuser';
$password = 'dbpass';
try {
$dbh = new PDO($dsn, $user, $password);
$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch (PDOException $e) {
echo 'Connection failed: ' . $e->getMessage();
}
?>
And try this code in your .php file :
$sth = $conn->prepare(SELECT * FROM memberpost)
$sth->execute();
$red = $sth->fetchAll();
print_r($red);

Answer 2

I found this on the internet, it might help:
// defining query
$sql = 'SELECT name, surname, zip FROM table';
// showing results
foreach($db->query($sql) as $row){
echo $row['name']. '<br>';
echo $row['surname']. '<br>';
echo $row['zip']. '<br>';
}
Source (ita): http://www.mrwebmaster.it/php/guida-utilizzo-pdo_7594_4.html