What are the advantages of using prepared statements in PHP mysqli functions for database queries instead of manually escaping user input?

When using prepared statements in PHP mysqli functions for database queries, you can prevent SQL injection attacks by separating SQL logic from user input data. Prepared statements automatically escape input parameters, making it safer and more secure to interact with the database compared to manually escaping user input. 

// Using prepared statements to safely query the database
$mysqli = new mysqli("localhost", "username", "password", "database");

// Prepare a statement
$stmt = $mysqli->prepare("SELECT * FROM users WHERE username = ?");
$stmt->bind_param("s", $username);

// Set parameters and execute
$username = $_POST['username'];
$stmt->execute();

// Get results
$result = $stmt->get_result();
while ($row = $result->fetch_assoc()) {
    // Process results
}

// Close statement and connection
$stmt->close();
$mysqli->close();

Keywords

PHP mysqli functions prepared statements database queries user input

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