Metadata on the WP_Post object
1554
Adding additional data to WP_Post object
73048
$_POST empty on utf-8 characters
62083
Make future posts visible to the public—not just within WP_Query
72704
Stack Overflow is getting a Meta of its own
34660
post meta data clearing on autosave
31333
How can I read PNG Metadata from PHP?
7259
What meta-information is contained in an image file?
85495
Metapost label based on variable value
24772
When should you use WP_Query vs query_posts() vs get_posts()?
139806
What is the right way to handle $_POST data in MVC?
136517
Remove custom metaboxes from custom post type
75130
getting posts and number by specific meta value in multiple meta
13168
Unable to Retrieve Metadata
82737
Using pre_get_posts with WP_Query
24327
Bibliography with Metadata:
50807
Custom post types, taxonomies, and permalinks
139632
With "magic quotes" disabled, why does PHP/WordPress continue to auto-escape my POST data?