Transients

Is it safe to delete unnecessary user metadata?

Is it safe to delete unnecessary user metadata?

Expired transients are transients that are expired and still exist in the database. These ones can be safely cleaned. Transients housekeeping is now part of WordPress core, as of version 4.9, so no need to clean up them manually unless you have specific needs.

Attachment How can i set media attachments to the author of the post or page for already existed posts with attachments
How can i set media attachments to the author of the post or page for already existed posts with attachments
How do I change the attachment page in WordPress? What is attachment sitemap? What is a media attachment? What are attachment URLs? What is the attach...
Category List categories
List categories
How do you show category list? How do I list categories in WordPress? How do I fetch all category names in WordPress? How do I get a list of all categ...
Filter How to pass a variable from Template to add_filter-Function?
How to pass a variable from Template to add_filter-Function?
How many parameters can be passed to Add_filter ()? How do you pass arguments in addaction? What is Apply_filters? How do you apply a filter? What is ...