What are the best practices for handling database queries in PHP to avoid errors like the one mentioned in the thread?

The best practice for handling database queries in PHP to avoid errors like the one mentioned in the thread is to use prepared statements with parameterized queries. This helps prevent SQL injection attacks and ensures that user input is properly sanitized before being executed as a query. 

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

// Prepare a parameterized query
$stmt = $pdo->prepare("SELECT * FROM users WHERE username = :username");

// Bind the parameter values
$stmt->bindParam(':username', $username);

// Execute the query
$stmt->execute();

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

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

Keywords

SQL injection prepared statements PDO error handling data validation

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