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Comparison of usage of php pdo and mysqli to connect to mysql

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Release： 2016-07-25 08:51:42
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  3. // pdo

  4. $pdo = new pdo("mysql:host=localhost;dbname=database", 'username', 'password');

  6. $mysqli = mysqli_connect('localhost','username','password','database');

  7. // mysqli, object-oriented

  8. $mysqli = new mysqli('localhost','username','password','database');

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3. Database support pdo supports multiple databases, but mysqli only supports mysql

4. Name parameter name parameter pdo method:

  2. $params = array(':username' => 'test', ':email' => $mail, ':last_login' => time() - 3600);
  3. $pdo- >prepare('
  4. select * from users
  5. where username = :username
  6. and email = :email
  7. and last_login > :last_login');
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MySQL is more troublesome and does not support this. Only:

  2. $query = $mysqli->prepare('
  3. select * from users
  4. where username = ?
  5. and email = ?
  6. and last_login > ?');
  7. $query->bind_param(' sss', 'test', $mail, time() - 3600);
  8. $query->execute();
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In this case, it will be more troublesome to sequence the question marks one by one. Not very convenient.

5. ORM mapping support For example, there is a class user, for example:

  2. class User
  3. {
  4. public $id;
  5. public $first_name;
  6. public $last_name;
  7. public function info()
  8. {
  9. return '#' . $this->id . ': ' . $this->first_name . ' ' . $this->last_name;
  10. }
  11. }
  12. $query = "SELECT id, first_name, last_name FROM users";
  13. // PDO
  14. $result = $pdo->query ($query);
  15. $result->setFetchMode(PDO::FETCH_CLASS, 'User');
  16. while ($user = $result->fetch())
  17. {
  18. echo $user->info() . "n";
  19. }
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mysqli uses a process-oriented approach: " n";

　　}
}
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  4. 6. Prevent sql injection (analysis of PHP methods to prevent sql injection): pdo manual setting
$username = pdo::quote($_get['username']);
$pdo->query("select * from users where username = $username");

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  1. Use mysqli:
$username = mysqli_real_escape_string($_get['username']);
$mysqli->query("select * from users where username = '$username'");

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  1. 7.preparestament pdo mode:
$pdo->prepare('select * from users where username = :username');
$pdo->execute(array(':username' => $_get['username'] ));

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  1. mysqli way:
$query = $mysqli->prepare('select * from users where username = ?');
$query->bind_param('s', $_get['username']);

$query->execute();

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Related labels：
php pdo与mysqli连接mysql用法对比
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