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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 |
|---|---|
| 1315 | $return .= '‎'; // Fix bi-directional text display defect in RTL languages. |
| 1316 | $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"; |
| 1317 | $return .= '<span id="editable-post-name-full">' . $post_name . "</span>\n"; |
| 1318 | } |
| 1319 | |
| 1320 | if ( isset( $view_post ) ) { |
| 1321 | if ( 'draft' == $post->post_status ) { |
| 1322 | $preview_link = set_url_scheme( get_permalink( $post->ID ) ); |
| 1323 | /** This filter is documented in wp-admin/includes/meta-boxes.php */ |
| 1324 | $preview_link = apply_filters( 'preview_post_link', add_query_arg( 'preview', 'true', $preview_link ), $post ); |
| 1325 | $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"; |
| 1326 | } else { |
| 1327 | if ( empty( $pretty_permalink ) ) { |
| 1328 | $pretty_permalink = $permalink; |
| 1329 | } |
| 1330 | |
| 1331 | $return .= "<span id='view-post-btn'><a href='" . $pretty_permalink . "' class='button button-small'>$view_post</a></span>\n"; |
| 1332 | } |
| 1333 | } |
| Line | Code |
| 1515 | // Latest content is in autosave |
| 1516 | $nonce = wp_create_nonce( 'post_preview_' . $post->ID ); |
| 1517 | $preview_link = add_query_arg( array( 'preview_id' => $post->ID, 'preview_nonce' => $nonce ), $preview_link ); |
| 1518 | } |
| 1519 | } else { |
| 1520 | $preview_link = ''; |
| 1521 | } |
| 1522 | |
| 1523 | /** This filter is documented in wp-admin/includes/meta-boxes.php */ |
| 1524 | $preview_link = apply_filters( 'preview_post_link', $preview_link, $post ); |
| 1525 | |
| 1526 | /** |
| 1527 | * Filter whether to allow the post lock to be overridden. |
| 1528 | * |
| 1529 | * Returning a falsey value to the filter will disable the ability |
| 1530 | * to override the post lock. |
| 1531 | * |
| 1532 | * @since 3.6.0 |
| 1533 | * |
| Line | Code |
| 1714 | $query_args['preview_nonce'] = wp_create_nonce( 'post_preview_' . $post->ID ); |
| 1715 | |
| 1716 | if ( isset( $_POST['post_format'] ) ) |
| 1717 | $query_args['post_format'] = empty( $_POST['post_format'] ) ? 'standard' : sanitize_key( $_POST['post_format'] ); |
| 1718 | } |
| 1719 | |
| 1720 | $url = add_query_arg( $query_args, get_permalink( $post->ID ) ); |
| 1721 | |
| 1722 | /** This filter is documented in wp-admin/includes/meta-boxes.php */ |
| 1723 | return apply_filters( 'preview_post_link', $url, $post ); |
| 1724 | } |
| 1725 | |
| 1726 | /** |
| 1727 | * Save a post submitted with XHR |
| 1728 | * |
| 1729 | * Intended for use with heartbeat and autosave.js |
| 1730 | * |
| 1731 | * @since 3.9.0 |
| 1732 | * |