Sanitizing, Validating and Escaping in WordPress Themes and Plugins

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4 likes•5,626 views

How secure is your WordPress theme or plugin? Are you confident that you have protected yourself, your clients or your users against the most common hacks? Validating, sanitizing and escaping are techniques that are foundational to the security of your website, application or software product. Learn how WordPress makes it easy for you to secure your code and start writing better code today!

Technology

Sanitizing, Validating and Escaping
in WordPress Themes and Plugins
by Micah Wood
@wpscholar
wpscholar.com/wpyall2014

Other Sanitization Functions
• sanitize_ﬁle_name()
• sanitize_key()
• sanitize_mime_type()
• sanitize_sql_orderby()
• sanitize_title_for_query()
• sanitize_title_with_dashes()
• sanitize_user()

Escape SQL Queries
Permanent link to this comic: http://xkcd.com/327/

Tips
• Search for echo $ and echo get_
• Use VIP Scanner if you are creating a theme

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Sanitizing, Validating and Escaping in WordPress Themes and Plugins

1. Sanitizing, Validating and Escaping in WordPress Themes and Plugins by Micah Wood @wpscholar wpscholar.com/wpyall2014

2. Sanitization Cleaning user input

3. Sanitization Example

4. Sanitize Text Fields

5. Sanitize URL Slugs

6. Sanitize URLs

7. Sanitize Emails

8. Sanitize HTML Classes

9. Sanitize HTML

10. Other Sanitization Functions • sanitize_ﬁle_name() • sanitize_key() • sanitize_mime_type() • sanitize_sql_orderby() • sanitize_title_for_query() • sanitize_title_with_dashes() • sanitize_user()

11. Validation Checking user input

12. Validation Example

13. Data Type

14. Validate HTML

15. Validate Meta

16. Validate Capability

17. Validate Option

18. Validate Intention

19. Escaping Securing output

20. Escape HTML Attributes

21. Escape HTML Attributes

22. Escape HTML