What are some best practices for efficiently handling and processing data stored in a database in PHP?

When handling and processing data stored in a database in PHP, it is important to use prepared statements to prevent SQL injection attacks and improve performance. Additionally, fetching data in batches rather than all at once can help optimize memory usage and processing speed. Finally, consider using indexes on frequently queried columns to speed up database queries. 

// Example of using prepared statements to fetch data from a database in PHP
// Assuming $conn is the database connection object

// Prepare a statement
$stmt = $conn->prepare("SELECT * FROM users WHERE id = ?");
$stmt->bind_param("i", $userId);

// Execute the statement
$userId = 1;
$stmt->execute();

// Bind the result variables
$stmt->bind_result($id, $name, $email);

// Fetch the data
while ($stmt->fetch()) {
    echo "ID: $id, Name: $name, Email: $email <br>";
}

// Close the statement
$stmt->close();

Keywords

SQL injection PDO prepared statements indexing data sanitization

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