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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 3080 | if ( $this->is_preview && $this->posts && current_user_can( $edit_cap, $this->posts[0]->ID ) ) { |
| 3081 | /** |
| 3082 | * Filters the single post for preview mode. |
| 3083 | * |
| 3084 | * @since 2.7.0 |
| 3085 | * |
| 3086 | * @param WP_Post $post_preview The Post object. |
| 3087 | * @param WP_Query $this The WP_Query instance (passed by reference). |
| 3088 | */ |
| 3089 | $this->posts[0] = get_post( apply_filters_ref_array( 'the_preview', array( $this->posts[0], &$this ) ) ); |
| 3090 | } |
| 3091 | } |
| 3092 | |
| 3093 | // Put sticky posts at the top of the posts array |
| 3094 | $sticky_posts = get_option( 'sticky_posts' ); |
| 3095 | if ( $this->is_home && $page <= 1 && is_array( $sticky_posts ) && ! empty( $sticky_posts ) && ! $q['ignore_sticky_posts'] ) { |
| 3096 | $num_posts = count( $this->posts ); |
| 3097 | $sticky_offset = 0; |
| 3098 | // Loop over posts and relocate stickies to the front. |