Validating form data and preventing common security vulnerabilities Mocktest

Validating form data helps prevent security vulnerabilities such as SQL injection, cross-site scripting (XSS), and form tampering.

SQL Injection is a type of attack where malicious SQL statements are inserted into an entry field for execution, leading to unauthorized access to the database.

The mysqli_real_escape_string() function in PHP escapes special characters in a string to prevent SQL injection attacks when inserting data into a MySQL database.

XSS (Cross-Site Scripting) is a security vulnerability that allows attackers to inject malicious scripts into web pages viewed by other users.

The htmlspecialchars() function in PHP converts special characters to HTML entities, preventing XSS attacks by rendering injected scripts harmless.

CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) presents challenges that are easy for humans to solve but difficult for bots, preventing automated form submissions.

Tokenization is a technique used for securing sensitive data by replacing it with unique tokens, but it's not typically used for form data validation.

Prepared statements in PHP prevent SQL Injection by separating SQL logic from user input, ensuring that input data is treated as data and not executable code.

Hashing passwords involves converting them into irreversible hashed values, making it secure even if the database is compromised.

CSRF Tokens are unique tokens generated for each session or form submission, ensuring that the request originates from the intended user and not an attacker.