What potential pitfalls should be considered when creating a PHP script to handle student grades and data input?

One potential pitfall to consider when creating a PHP script to handle student grades and data input is the risk of SQL injection attacks if user input is not properly sanitized. To prevent this, always use prepared statements or parameterized queries when interacting with a database to avoid malicious code execution. 

// Example of using prepared statements to prevent SQL injection

// Assuming $conn is the database connection object

// Prepare a SQL statement
$stmt = $conn->prepare("INSERT INTO grades (student_id, grade) VALUES (?, ?)");

// Bind parameters
$stmt->bind_param("is", $student_id, $grade);

// Set parameters and execute
$student_id = $_POST['student_id'];
$grade = $_POST['grade'];
$stmt->execute();

Keywords

SQL injection data validation error handling secure coding input sanitization

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