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PHP Security

PHP Security - Important Points


1. What is SQL Injection?

A. A type of Cross-Site Scripting attack

B. A vulnerability that allows an attacker to execute SQL statements against a database

C. A method to bypass CAPTCHA

D. A type of Denial-of-Service attack

Discuss Work Space

Answer: option b

Explanation:

SQL injection is a type of vulnerability that occurs when user input is not properly sanitized and allows an attacker to inject malicious SQL statements into the application's database.

2. What is Cross-Site Scripting (XSS)?

A. A type of SQL Injection attack

B. A vulnerability that allows an attacker to inject scripts into a website viewed by other users

C. A method to bypass firewalls

D. A type of Social Engineering attack

Discuss Work Space

Answer: option b

Explanation:

Cross-Site Scripting (XSS) is a vulnerability that allows an attacker to inject malicious scripts into a web page viewed by other users, allowing the attacker to steal sensitive information or perform other malicious actions.

3. Which of the following is a PHP function used to prevent SQL Injection?

A. mysql_query()

B. pg_query()

C. mysqli_real_escape_string()

D. sqlite_query()

Discuss Work Space

Answer: option c

Explanation:

The mysqli_real_escape_string() function is used to escape special characters in a string to prevent SQL injection.

4. Which of the following is a method to prevent Cross-Site Scripting attacks in PHP?

A. Sanitizing user input

B. Using a CAPTCHA

C. Disabling JavaScript in the browser

D. Using SSL encryption

Discuss Work Space

Answer: option a

Explanation:

Sanitizing user input by removing or encoding special characters is a common method to prevent Cross-Site Scripting attacks.

5. What is a Session Hijacking attack?

A. A type of Cross-Site Scripting attack

B. A method to bypass firewalls

C. A vulnerability that allows an attacker to steal a user's session ID and take over their session

D. A type of Denial-of-Service attack

Discuss Work Space

Answer: option c

Explanation:

Session hijacking is a type of attack where an attacker steals a user's session ID, allowing them to take over the user's session.


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