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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