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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 |
|---|---|
| 75 | |
| 76 | if ($post->post_status == 'static') |
| 77 | include('edit-page-form.php'); |
| 78 | else |
| 79 | include('edit-form-advanced.php'); |
| 80 | |
| 81 | ?> |
| 82 | <div id='preview' class='wrap'> |
| 83 | <h2 id="preview-post"><?php _e('Post Preview (updated when post is saved)'); ?> <small class="quickjump"><a href="#write-post"><?php _e('edit ↑'); ?></a></small></h2> |
| 84 | <iframe src="<?php echo clean_url(apply_filters('preview_post_link', add_query_arg('preview', 'true', get_permalink($post->ID)))); ?>" width="100%" height="600" ></iframe> |
| 85 | </div> |
| 86 | <?php |
| 87 | break; |
| 88 | |
| 89 | case 'editattachment': |
| 90 | $post_id = (int) $_POST['post_ID']; |
| 91 | |
| 92 | check_admin_referer('update-attachment_' . $post_id); |
| 93 | |