Attachment Pages Redirect

There are three possible scenarios where this plugin does something. In all cases, the attachment page must exists, the plugin will not run for deleted attachments: A) A visitor lands on an attachment page and the parent post is available (not in trash or deleted). A 301 redirect will be issued to redirect the visitor to the parent post. B) A visitor lands on an attachment page and the parent post was already deleted from trash. A 302 redirect is issued to home page (this can be changed to 301 if you want, see FAQ for more details). C) A visitor lands on an attachment page and the parent post is in trash, therefore not available for the visitor. It returns a 404 error code to prevent endless redirection loop in old WP releases and redirecting to trashed/not available posts. There is no options page, simply activate it and will do the job. If you're happy with the plugin please don't forget to give it a good rating, it will motivate me to keep sharing and improving this plugin (and others). 必需条件

• WordPress 4.8 or higher.

1.1.2

• Changed code for 404 scenario to use the theme's 404 template if it's available.

1.1.1

• Minor changes to make code 100% compliant with WordPress Coding Standards. This doesn't means any change in the plugin functionality, it's just code cosmetic.

1.1

• Minor coding standards improvements.
• Added ATTACHMENT_REDIRECT_CODE and ORPHAN_ATTACHMENT_REDIRECT_CODE constants to allow change the HTTP redirection codes (e.g. change 302 to 301 for orphan attachments)
• Prevent endless redirection loop in old WP releases and redirecting to trashed/not available posts if an attachment page is visited when parent post is in trash. Returning a 404 error in this case.

1.0

• Initial release.