What are the best practices for handling SQL queries in PHP arrays?

When handling SQL queries in PHP arrays, it is best practice to use prepared statements to prevent SQL injection attacks and ensure data integrity. Prepared statements separate the SQL query from the user input, making it safer to execute queries with user-supplied data. Additionally, using parameterized queries can improve performance by allowing the database to cache query execution plans. 

// Connect to the database
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

$conn = new mysqli($servername, $username, $password, $dbname);

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

// Bind parameters to the placeholders
$username = "john_doe";
$stmt->bind_param("s", $username);

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

// Get the results
$result = $stmt->get_result();

// Fetch data from the result set
while ($row = $result->fetch_assoc()) {
    // Process the data
}

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

Keywords

SQL queries PHP arrays data manipulation prepared statements SQL injection

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