How can one efficiently handle SQL queries in PHP to avoid errors like the one mentioned in the thread?

To efficiently handle SQL queries in PHP and avoid errors, it's important to use prepared statements with parameterized queries. This helps prevent SQL injection attacks and ensures that data is properly sanitized before being executed in the database. 

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

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

// Bind the parameter values
$username = $_POST['username'];
$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) {
    echo $row['username'] . "<br>";
}

Keywords

SQL injection prepared statements PDO error handling data validation

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