The MySQLi Extension (MySQL Improved) is a relational database driver used in the PHP programming language to provide an interface with MySQL databases. There are three main API options when considering connecting to a MySQL database server: PHP's MySQL Extension. PHP's MySQLi Extension. PHP Data Objects (PDO)

1. *MySQLi
* NOT a different version
of MySQL!
* is a php’s extension
* provides API’s
* MySQL(i-mproved)
*Image Courtesy MySQL

2. *3 API(s) to connect to MySQL
* PHP's MySQL Extension
* PHP's MySQLi Extension
* PHP Data Objects (PDO)

3. *WHY MySQLi?
* Object-oriented interface
* Support for Prepared Statements
* Support for Multiple Statements
* Support for Transactions
* Enhanced debugging capabilities
* Embedded server support

5. *Connection to MySQL via MySQLi
<?php
$ServerName = "localhost";
$UserName = "username";
$password = "password";
// Create connection
$conn = new mysqli($ServerName, $UserName, $password);
// Check connection
if ($conn->connect_error)
{
die("Connection failed: " . $conn->connect_error);
}
echo "Connected successfully";
?>

6. *Result Set
<?php
$sql="SELECT Lastname,Age FROM Persons ORDER BY Lastname";
if ($result=mysqli_query($con,$sql))
{
// Fetch one and one row
while ($row=mysqli_fetch_row($result))
{
printf ("%s (%s)n",$row[0],$row[1]);
}
// Free result set
mysqli_free_result($result);
}
mysqli_close($con);
?>

7. *Prepared Queries
<?php
// Prepare & Bind
$stmt = $conn->prepare("INSERT INTO MyGuests (firstname, lastname, email) VALUES (?, ?, ?)");
$stmt->bind_param("sss", $firstname, $lastname, $email);
// Set parameters and Execute
$firstname = "John";
$lastname = "Doe";
$email = "john@example.com";
$stmt->execute();
$firstname = "Mary";
$lastname = "Moe";
$email = "mary@example.com";
$stmt->execute();
$firstname = "Julie";
$lastname = "Dooley";
$email = "julie@example.com";
$stmt->execute();
echo "New records created successfully";
?>

8. *Transaction Support
<?php
$mysqli = new mysqli("example.com", "user", "passwor
d", "database");
$mysqli->autocommit(false);
$mysqli->query("INSERT INTO test(id) VALUES (1)");
$mysqli->rollback();
$mysqli->query("INSERT INTO test(id) VALUES (2)");
$mysqli->commit();
?>

9. *Courtesies
* The PHP Group
* Wikipedia
* Stack-Overflow
* W3-Schools