How can SQL Injections be avoided using Prepared Statements in PDO?

SQL Injections can be avoided using Prepared Statements in PDO by separating the SQL query from the user input. This way, the user input is treated as data rather than executable SQL code, preventing malicious code injection. 

// Using Prepared Statements in PDO to avoid SQL Injections

// Establish a connection to the database
$pdo = new PDO("mysql:host=localhost;dbname=mydatabase", "username", "password");

// Prepare a SQL statement with a placeholder for user input
$stmt = $pdo->prepare("SELECT * FROM users WHERE username = :username");

// Bind the user input to the placeholder in the SQL statement
$stmt->bindParam(':username', $username);

// Execute the prepared statement
$stmt->execute();

// Fetch the results
$results = $stmt->fetchAll();

// Loop through the results
foreach ($results as $row) {
    // Process the data
}

Keywords

SQL Injections Prepared Statements PDO PHP Security

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