Using WordPress ‘add_plugins_page()’ PHP function
The `add_plugins_page()` function in WordPress allows developers to add a submenu page to the "Plugins" main menu, requiring specific capabilities and checking them before inclusion
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Using WordPress ‘convert_chars()’ PHP function
Converts lone & characters into & (a.k.a. &)
Using WordPress ‘add_filter()’ PHP function
The article explains how to use the `add_filter()` function in WordPress to modify internal data at runtime by binding a callback to a filter hook
Using WordPress ‘add_existing_user_to_blog()’ PHP function
Adds a user to a blog based on details from maybe_add_existing_user_to_blog() .