how to fetch data from mysql database using php pdo code example

Example 1: php mysql select data pdo

$host = 'localhost'; // URL to the server
$user = 'root'; // Username (xampp = root)
$pw = ''; // Password (xampp = )
$dbname = 'database'; // The name of your database 
$dsn = "mysql:host=$host;dbname=$dbname";
$options = [PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8']; // If you want to use utf-8 use this line

$db = new PDO($dsn, $user, $pw, $options); // Database Object
$db -> setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC); // Use this if you want an associate array
// $db -> setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC); Use this if you want an indexed array

$qry = 'select * from table;'; // Your query
$result = $db -> query($qry); // execute query

while ($row = $result -> fetch()) {
    $id = $row[/*column-name*/];
}

Example 2: php pdo fetch from db

$dbhost = @mysql_connect($host, $user, $pass) or die('Unable to connect to server');

@mysql_select_db('divebay') or die('Unable to select database');
$search = $_GET['searchdivebay'];
$query = trim($search);

$sql = "SELECT * FROM auction WHERE name LIKE '%" . $query . "%'";



if(!isset($query)){
echo 'Your search was invalid';
exit;
} //line 18

$result = mysql_query($trim);
$numrows = mysql_num_rows($result);
mysql_close($dbhost);