What are some best practices for allowing users to input data into a MySQL database using PHP?

One best practice for allowing users to input data into a MySQL database using PHP is to use prepared statements to prevent SQL injection attacks. Another best practice is to validate user input before inserting it into the database to ensure data integrity. Additionally, it's important to sanitize user input to prevent any malicious code from being executed. 

<?php
// Establish database connection
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

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

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

// Prepare and bind SQL statement
$stmt = $conn->prepare("INSERT INTO table_name (column1, column2) VALUES (?, ?)");
$stmt->bind_param("ss", $value1, $value2);

// Validate and sanitize user input
$value1 = filter_var($_POST['input1'], FILTER_SANITIZE_STRING);
$value2 = filter_var($_POST['input2'], FILTER_SANITIZE_STRING);

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

echo "New records inserted successfully";

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

Keywords

SQL injection prepared statements PDO data validation error handling

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