Getting error "No database selected" [closed] - php

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Trying to query database table. I'm getting a connection successful result when I run the connection script but can't figure out whats wrong with the query. Sorry I'm new to php
<?php
$servername = "localhost";
$database = "laravel";
$username = "root";
$password = "root";
try {
$conn = new PDO("mysql:host=$servername;dbname=$database", $username, $password);
// set the PDO error mode to exception
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
echo "Connected successfully";
}
catch(PDOException $e)
{
echo "Connection failed: " . $e->getMessage();
}
$result = mysql_query("SELECT * FROM users WHERE id=1") or die(mysql_error());
if(mysql_num_rows($result) > 0): ?>
<table>
<tr>
<th>name</th>
<th>lastname</th>
<tr>
<?php while($row = mysql_fetch_assoc($result)): ?>
<tr>
<td><?php echo $row['name']; ?></td>
<td><?php echo $row['lastname']; ?></td>
</tr>
<?php endwhile; ?>
</table>
<?php endif; ?>
?>

Answer 1

No, don't MIX them, just use PDO all the way through. Use methods ->query() and ->fetch() accordingly.
<?php
$servername = "localhost";
$database = "laravel";
$username = "root";
$password = "root";
try {
$conn = new PDO("mysql:host=$servername;dbname=$database", $username, $password);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); // set the PDO error mode to exception
} catch(PDOException $e) {
echo "Connection failed: " . $e->getMessage();
}
$query = $conn->query('SELECT * FROM users');
?>
<table>
<tr>
<th>name</th>
<th>lastname</th>
<tr>
<?php while($row = $query->fetch(PDO::FETCH_ASSOC)): ?>
<tr>
<td><?php echo $row['name']; ?></td>
<td><?php echo $row['lastname']; ?></td>
</tr>
<?php endwhile; ?>
</table>