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Uploaded byJaydeep Kale
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Comprehensive Guide to PHP-MySQL Connection Using MySQLi Extension

Learn how to connect PHP with MySQL databases using MySQLi, including setup, syntax, connection steps, and closing connections for efficient web development.

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PHP–MySQL Connection using MySQLi Prepared By:- Kale J. N. Assistant Professor, Computer Engineering, Sanjivani College of Engineering, Kopargaon Prepared By: Kale J. N.
1. Introduction • Most websites need to store and retrieve data such as: • Student records • User login information • Registration details • Product information • This data is stored in a database. PHP can interact with a database using MySQLi. • Therefore, PHP–MySQL connection is required so that PHP programs can communicate with the MySQL database. Prepared By: Kale J. N.
2. What is MySQLi? • MySQLi stands for: • MySQL Improved • It is a PHP extension used to connect PHP with MySQL database. • Features of MySQLi: • Faster than old MySQL extension • Supports prepared statements • Supports transactions • Supports both procedural and object-oriented programming Prepared By: Kale J. N.
3. Requirements for PHP–MySQL Connection • Before connecting PHP with MySQL, the following are required: • Web Server (Apache) • PHP installed • MySQL Database • Common development environments include: • XAMPP • WampServer • These packages contain Apache + PHP + MySQL. Prepared By: Kale J. N.
4. Steps to Connect PHP with MySQL Prepared By: Kale J. N.
5. Syntax of MySQLi Connection • mysqli_connect(servername, username, password, database) Parameter Description servername Location of database server username MySQL username password MySQL password database Name of database Prepared By: Kale J. N.
6. PHP–MySQL Connection Program <?php $servername = "localhost"; $username = "root"; $password = ""; $database = "college"; $conn = mysqli_connect($servername, $username, $password, $database); Prepared By: Kale J. N. if(!$conn) { die("Connection Failed"); } else { echo "Database Connected Successfully"; } ?>
• Step 1: Server Name • Step 2: Username • Step 3: Password • Step 4: Database Name • Step 5: Creating Connection • Step 6: Checking Connection • die() stops the program and prints the message. • Step 7: Successful Connection Prepared By: Kale J. N.
7. Closing Database Connection • After finishing database operations, the connection should be closed. • mysqli_close($conn); • Example: • mysqli_close($conn); Prepared By: Kale J. N.