New snippets for hacktoberfest

[Mte90]

This is a call to improve the list with new snippets. So what you have to do as wordpress developer?

• Suggest interesting snippets about wordpress development in real plugins
• Read the list
• Do a pr for new snippets

[Bobeta]

I'll add some snippets that I have found to be very handy 👍

[LiamBailey]

I have a good snipped on rewrite rules if you are still looking for some for this?

[Mte90]

pretty cool!

[DigitalDesignerOnline]

Adding a pull request shortly with a few snippets that always take my WordPress Projects to the next level.

[DigitalDesignerOnline]

What about a snippet for custom solutions, I have a wp snippet I use that adds an extra validation to the login script based on a seperate custom database table. For instance if under the column active if the specific user has the value no then the user cannot log in, I have had to use this when working with a variety of corporate accounts whereas they want to integrate their external (and must always be external) members list with the WordPress login functionality. This was something that I was not easily able to find a solution online for nor was I able to get much assistance when needed so I was thinking it may be worthy of your criteria. Your thoughts? I have added a couple simple snippets to a pull request as they are staples for all projects I work on and thought it would allow for easy access to those experienced and don't want to store yet another snippet as well as those reading your repo wanting to learn and advance their theme development regarding dashboard customization.

[Mte90]

For me is good, everything that is something advanced fit in the criteria :-D