WordPress.org

This plugin is used to validate custom fields and post taxonomies .Custom field can be organised under metaboxes. Meta boxes settings include location(normal,side),priority(high,low) and the post type to display them for.With it you can create custom fields using the following type of input:

• Single line input text
• Multi line text
• WYSIWYG editor
• Drop down list
• Checkbox
• Checkbox list
• Date

With the input also comes validations

• Required field validation (text,textarea,WYSIWYG)
• String length (max and min)
• Maximum selection (checkboxes,hierarchical taxonomies)
• Minimum selection (checkboxes,hierarchical taxonomies)
• Maximum entry (non hierarchical taxonomies)
• Minimum entry (non hierarchical taxonomies)
• No selection ,usefull for drop down list when the is a value that must not be selected