Hooks are an essential part of WordPress development projects, enabling developers to insert their own code at specific points in the execution process without modifying the core WordPress files. They come in two forms: action hooks and filter hooks. Action hooks allow developers to insert custom functions (actions) at specific points, while filter hooks allow them to modify data (like text) at specific points.

Debugging in WordPress is facilitated through the WP_DEBUG constant, which is located in the wp-config.php file. When set to “true”, WP_DEBUG displays all PHP errors, notices, and warnings. Additionally, there’s WP_DEBUG_LOG, which records all errors into a debug.log file in the wp-content directory, and WP_DEBUG_DISPLAY, which controls whether debug messages are shown within the HTML of pages or not.

Several rules should be followed for WordPress plugin development, including: adhering to WordPress coding standards; ensuring security by validating, sanitizing, and escaping data; avoiding naming collisions by prefixing everything; using proper file structure and organizing code effectively; leveraging WordPress APIs and built-in functions; and finally, testing thoroughly in various environments.

If a WordPress file gets hacked, the following steps must be taken: Identify and verify the hack (unusual website behavior, warnings from search engines or security providers); take the site offline or restrict access to prevent further damage; backup the website, but keep it separate from clean backups; scan and remove the malicious code (plugins like Wordfence or Sucuri can help); identify and fix the vulnerability that was exploited; update and strengthen your website’s security (strong passwords, updated plugins, and themes, reliable security plugin); and report the incident to proper authorities, if necessary.

You might get locked out of your WordPress admin section for several reasons such as: incorrect password entries, forgotten login details, a problem with your user account in the database, or due to a security plugin that may have blocked your IP. Depending on the cause, solutions might involve password reset, deactivating plugins via FTP, restoring a previous backup, or directly editing the database to correct user account issues.