Are there any security considerations to keep in mind when saving data in multiple tables in PHP?

When saving data in multiple tables in PHP, it is important to consider security measures to prevent SQL injection attacks. One way to mitigate this risk is to use prepared statements with parameterized queries to sanitize user inputs before executing SQL queries. This helps to prevent malicious code from being inserted into the database. 

// Establish a database connection
$connection = new mysqli('localhost', 'username', 'password', 'database');

// Prepare a SQL statement with placeholders for user inputs
$stmt = $connection->prepare("INSERT INTO table1 (column1, column2) VALUES (?, ?)");
$stmt->bind_param('ss', $value1, $value2);

// Sanitize user inputs and execute the query
$value1 = filter_var($_POST['value1'], FILTER_SANITIZE_STRING);
$value2 = filter_var($_POST['value2'], FILTER_SANITIZE_STRING);
$stmt->execute();

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

Keywords

SQL injection prepared statements PDO data validation cross-site scripting

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