What are common errors when using SQL queries in PHP, and how can they be resolved?

One common error when using SQL queries in PHP is not properly escaping user input, which can lead to SQL injection attacks. To resolve this, you should use prepared statements with parameterized queries to safely handle user input. 

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

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

// Bind the parameter value
$stmt->bindParam(':username', $_POST['username']);

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

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

Keywords

SQL queries PHP errors resolution troubleshooting

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