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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 |
|---|---|
| 2147 | * @return mixed False on failure |
| 2148 | */ |
| 2149 | function wp_untrash_post($post_id = 0) { |
| 2150 | if ( !$post = wp_get_single_post($post_id, ARRAY_A) ) |
| 2151 | return $post; |
| 2152 | |
| 2153 | if ( $post['post_status'] != 'trash' ) |
| 2154 | return false; |
| 2155 | |
| 2156 | do_action('untrash_post', $post_id); |
| 2157 | |
| 2158 | $post_status = get_post_meta($post_id, '_wp_trash_meta_status', true); |
| 2159 | |
| 2160 | $post['post_status'] = $post_status; |
| 2161 | |
| 2162 | delete_post_meta($post_id, '_wp_trash_meta_status'); |
| 2163 | delete_post_meta($post_id, '_wp_trash_meta_time'); |
| 2164 | |
| 2165 | wp_insert_post($post); |