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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 |
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713 | // Apply the same filters as when calling wp_insert_post(). |
714 |
|
715 | /** This filter is documented in wp-includes/post.php */ |
716 | $menu_item_value['title'] = wp_unslash( apply_filters( 'title_save_pre', wp_slash( $menu_item_value['title'] ) ) ); |
717 |
|
718 | /** This filter is documented in wp-includes/post.php */ |
719 | $menu_item_value['attr_title'] = wp_unslash( apply_filters( 'excerpt_save_pre', wp_slash( $menu_item_value['attr_title'] ) ) ); |
720 |
|
721 | /** This filter is documented in wp-includes/post.php */ |
722 | $menu_item_value['description'] = wp_unslash( apply_filters( 'content_save_pre', wp_slash( $menu_item_value['description'] ) ) ); |
723 |
|
724 | if ( '' !== $menu_item_value['url'] ) { |
725 | $menu_item_value['url'] = esc_url_raw( $menu_item_value['url'] ); |
726 | if ( '' === $menu_item_value['url'] ) { |
727 | return new WP_Error( 'invalid_url', __( 'Invalid URL.' ) ); // Fail sanitization if URL is invalid. |
728 | } |
729 | } |
730 | if ( 'publish' !== $menu_item_value['status'] ) { |
731 | $menu_item_value['status'] = 'draft'; |