WordPress Theme Development

  1. Security Best Practices
    1. Data Validation and Sanitization
      1. Input Validation
        1. Data Sanitization Functions
          1. Output Escaping
          2. Escaping Output
            1. esc_html() Function
              1. esc_attr() Function
                1. esc_url() Function
                  1. wp_kses() Function
                  2. Using Nonces
                    1. Creating Nonces
                      1. Verifying Nonces
                        1. Nonce Security
                        2. Preventing Code Injection
                          1. SQL Injection Prevention
                            1. Cross-Site Scripting Prevention
                              1. Cross-Site Request Forgery Prevention
                              2. File Security
                                1. File Upload Security
                                  1. Directory Permissions
                                    1. Preventing Direct File Access

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                                  16. Accessibility in Theme Development

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                                  18. Internationalization and Localization