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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.
This hook occurs 3 times in this file.
| Line | Code |
|---|---|
| 1236 | $return .= '‎'; // Fix bi-directional text display defect in RTL languages. |
| 1237 | $return .= '<span id="edit-slug-buttons"><a href="#post_name" class="edit-slug button button-small hide-if-no-js" onclick="editPermalink(' . $id . '); return false;">' . __( 'Edit' ) . "</a></span>\n"; |
| 1238 | $return .= '<span id="editable-post-name-full">' . $post_name . "</span>\n"; |
| 1239 | } |
| 1240 | |
| 1241 | if ( isset( $view_post ) ) { |
| 1242 | if( 'draft' == $post->post_status ) { |
| 1243 | $preview_link = set_url_scheme( get_permalink( $post->ID ) ); |
| 1244 | /** This filter is documented in wp-admin/includes/meta-boxes.php */ |
| 1245 | $preview_link = apply_filters( 'preview_post_link', add_query_arg( 'preview', 'true', $preview_link ), $post ); |
| 1246 | $return .= "<span id='view-post-btn'><a href='" . esc_url( $preview_link ) . "' class='button button-small' target='wp-preview-{$post->ID}'>$view_post</a></span>\n"; |
| 1247 | } else { |
| 1248 | $return .= "<span id='view-post-btn'><a href='" . get_permalink( $post ) . "' class='button button-small'>$view_post</a></span>\n"; |
| 1249 | } |
| 1250 | } |
| 1251 | |
| 1252 | /** |
| 1253 | * Filter the sample permalink HTML markup. |
| 1254 | * |
| Line | Code |
| 1420 | // Latest content is in autosave |
| 1421 | $nonce = wp_create_nonce( 'post_preview_' . $post->ID ); |
| 1422 | $preview_link = add_query_arg( array( 'preview_id' => $post->ID, 'preview_nonce' => $nonce ), $preview_link ); |
| 1423 | } |
| 1424 | } else { |
| 1425 | $preview_link = ''; |
| 1426 | } |
| 1427 | |
| 1428 | /** This filter is documented in wp-admin/includes/meta-boxes.php */ |
| 1429 | $preview_link = apply_filters( 'preview_post_link', $preview_link, $post ); |
| 1430 | |
| 1431 | /** |
| 1432 | * Filter whether to allow the post lock to be overridden. |
| 1433 | * |
| 1434 | * Returning a falsey value to the filter will disable the ability |
| 1435 | * to override the post lock. |
| 1436 | * |
| 1437 | * @since 3.6.0 |
| 1438 | * |
| Line | Code |
| 1619 | $query_args['preview_nonce'] = wp_create_nonce( 'post_preview_' . $post->ID ); |
| 1620 | |
| 1621 | if ( isset( $_POST['post_format'] ) ) |
| 1622 | $query_args['post_format'] = empty( $_POST['post_format'] ) ? 'standard' : sanitize_key( $_POST['post_format'] ); |
| 1623 | } |
| 1624 | |
| 1625 | $url = add_query_arg( $query_args, get_permalink( $post->ID ) ); |
| 1626 | |
| 1627 | /** This filter is documented in wp-admin/includes/meta-boxes.php */ |
| 1628 | return apply_filters( 'preview_post_link', $url, $post ); |
| 1629 | } |
| 1630 | |
| 1631 | /** |
| 1632 | * Save a post submitted with XHR |
| 1633 | * |
| 1634 | * Intended for use with heartbeat and autosave.js |
| 1635 | * |
| 1636 | * @since 3.9.0 |
| 1637 | * |