The document explains the mysqli extension for PHP, which enhances MySQL database interactions through improved APIs, supporting object-oriented interfaces, prepared statements, and transactions. It includes practical code examples demonstrating how to establish connections, perform queries, and manage transactions using mysqli. The content also emphasizes its features for debugging and handling multiple statements.

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