Programming With PHP by Edet Theophilus

Author:Edet, Theophilus
Language: eng
Format: epub
Publisher: CompreQuest Books
Published: 2023-09-22T00:00:00+00:00

Connecting to MySQL Database with PHP

Connecting to a MySQL database is a fundamental step in PHP web development, allowing you to store and retrieve data efficiently. PHP provides various functions and libraries to establish and manage database connections seamlessly.

Using mysqli_connect(): PHP's mysqli extension is a popular choice for connecting to MySQL databases. To establish a connection, use the mysqli_connect() function, providing the database server hostname, username, password, and database name as arguments.

$servername = "localhost";

$username = "user";

$password = "password";

$dbname = "mydatabase";

$conn = mysqli_connect($servername, $username, $password, $dbname);

if (!$conn) {

die("Connection failed: " . mysqli_connect_error());

}

Executing SQL Queries: Once the connection is established, you can execute SQL queries using functions like mysqli_query(). This allows you to perform operations such as inserting, updating, deleting, and retrieving records from the database.

$sql = "INSERT INTO users (username, email) VALUES ('john', '[email protected]')";

if (mysqli_query($conn, $sql)) {

echo "Record inserted successfully.";

} else {

echo "Error: " . mysqli_error($conn);

}

Closing the Connection: It's essential to close the database connection when you're done with it to free up resources. Use mysqli_close() for this purpose.

mysqli_close($conn);

Connecting to a MySQL database with PHP enables you to create dynamic web applications that interact with data. It's a crucial skill for developers who want to build feature-rich and data-driven websites or web services.

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