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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 |
|---|---|
| 217 | |
| 218 | $post = $post_ID = $p = (int) $_GET['post']; |
| 219 | |
| 220 | if ( !user_can_edit_post($user_ID, $post_ID) ) |
| 221 | die ( __('You are not allowed to edit this post.') ); |
| 222 | |
| 223 | $postdata = &get_post($post_ID); |
| 224 | $content = $postdata->post_content; |
| 225 | $content = format_to_edit($content); |
| 226 | $content = apply_filters('content_edit_pre', $content); |
| 227 | $excerpt = $postdata->post_excerpt; |
| 228 | $excerpt = format_to_edit($excerpt); |
| 229 | $excerpt = apply_filters('excerpt_edit_pre', $excerpt); |
| 230 | $edited_post_title = format_to_edit($postdata->post_title); |
| 231 | $edited_post_title = apply_filters('title_edit_pre', $edited_post_title); |
| 232 | $post_status = $postdata->post_status; |
| 233 | $comment_status = $postdata->comment_status; |
| 234 | $ping_status = $postdata->ping_status; |
| 235 | $post_password = $postdata->post_password; |