Help! Our navigation menu keeps mysteriously disappearing WordPress

Dbranes answers:

How many items do you have in the nav-menu ?

I've seen this issue appearing recently, for few menu items, for example reported here:

- [[LINK href="http://wordpress.stackexchange.com/questions/145811/menu-items-all-menus-being-deleted-randomly-on-their-own"]]http://wordpress.stackexchange.com/questions/145811/menu-items-all-menus-being-deleted-randomly-on-their-own[[/LINK]]

- [[LINK href="http://wordpress.stackexchange.com/questions/145583/all-menu-items-disappear-seemingly-at-random"]]http://wordpress.stackexchange.com/questions/145583/all-menu-items-disappear-seemingly-at-random[[/LINK]]

- [[LINK href="http://wordpress.stackexchange.com/questions/145953/wp-delete-auto-drafts-deletes-links-in-menus"]]http://wordpress.stackexchange.com/questions/145953/wp-delete-auto-drafts-deletes-links-in-menus[[/LINK]]

- [[LINK href="http://wordpress.stackexchange.com/questions/64487/nav-menu-items-disappearing-but-not-immediately"]]http://wordpress.stackexchange.com/questions/64487/nav-menu-items-disappearing-but-not-immediately[[/LINK]]

Some ideas have come forward there, for example:

- create a logger, check for example [[LINK href="http://wordpress.stackexchange.com/a/65355/26350"]]this idea[[/LINK]].
- create a dev blog without any plugins and the default theme and change it step by step, but this may take some time.

<strong>Update:</strong>

If you want to know when the <em>nav menu items</em> change, then here's an example of a <em>nav menu items</em> count logger:

/**
* A logger for nav menu items count
*
* @link http://www.wpquestions.com/question/showChronoLoggedIn/id/9618
*/

function wpq_debug_nav_menu_items( $items, $menu, $args ) {

$file = '/full/path/to/debug-menu-items.log'; // Edit this filepath to your needs.

if( file_exists( $file )
&& is_writeable( $file )
) {
$s = sprintf( " %s - menu: %s - count: %d %s" , date( "c" ),
$menu->slug,
$menu->count,
PHP_EOL
);
file_put_contents( $file, $s, FILE_APPEND | LOCK_EX );
}

return $items;
}

add_filter( 'wp_get_nav_menu_items', 'wpq_debug_nav_menu_items', 99, 3 );


You can modify this to your needs, just make sure to change <em>$file</em> settings and that the log file is writeable.

You could also consider logging your SQL queries:

/**
* Dump all SQL queries to a file.
*
* @link http://www.wpquestions.com/question/showChronoLoggedIn/id/9618
*/

function wpq_debug_sql_queries() {

$file = '/full/path/to/debug-sql-queries.log'; // Edit this filepath to your needs.

if( file_exists( $file )
&& is_writeable( $file )
&& isset( $GLOBALS['wpdb']->queries )
) {
file_put_contents(
$file,
date( 'c' ) . PHP_EOL . print_r( $GLOBALS['wpdb']->queries, TRUE ),
FILE_APPEND | LOCK_EX
);
}

}

add_action( 'shutdown', 'wpq_debug_sql_queries' );


You just have to modify the <em>$file</em> settings and remember to add the following line:

define( 'SAVEQUERIES', TRUE );


to your <em>wp-config.php</em> file.

Notice this might add extra load to your site, but for moderate traffic, it shouldn't be that heavy.

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