plugins - What's causing this error? "Warning: Invalid argument"

I noticed today that my error logs are littered with this information. I'm not quite sure what's causing it. Has anyone seen this before?

[Mon Mar 25 17:24:23 2013] [error] [client] PHP Warning: Invalid argument supplied for foreach() in /var/www/html/mysite/wp-admin/includes/plugin.php on line 1290, referer: http://mysite/contact/

Line 1290 is the foreach in the following code. I am not sure what's referencing this or where to begin looking.

/**
 * Remove a top level admin menu
 *
 * @since 3.1.0
 *
 * @param string $menu_slug The slug of the menu
 * @return array|bool The removed menu on success, False if not found
 */

function remove_menu_page( $menu_slug ) {
global $menu;

foreach ( $menu as $i => $item ) {
    if ( $menu_slug == $item[2] ) {
        unset( $menu[$i] );
        return $item;
    }
}

return false;
}

I'm not hooking into admin_menu as far as I can tell.

Any ideas?

I noticed today that my error logs are littered with this information. I'm not quite sure what's causing it. Has anyone seen this before?

[Mon Mar 25 17:24:23 2013] [error] [client] PHP Warning: Invalid argument supplied for foreach() in /var/www/html/mysite/wp-admin/includes/plugin.php on line 1290, referer: http://mysite/contact/

Line 1290 is the foreach in the following code. I am not sure what's referencing this or where to begin looking.

/**
 * Remove a top level admin menu
 *
 * @since 3.1.0
 *
 * @param string $menu_slug The slug of the menu
 * @return array|bool The removed menu on success, False if not found
 */

function remove_menu_page( $menu_slug ) {
global $menu;

foreach ( $menu as $i => $item ) {
    if ( $menu_slug == $item[2] ) {
        unset( $menu[$i] );
        return $item;
    }
}

return false;
}

I'm not hooking into admin_menu as far as I can tell.

Any ideas?

• plugins
• admin
• errors
• admin-menu
• core

Share Improve this question asked Mar 25, 2013 at 21:32 PatPat 68122 gold badges1010 silver badges2929 bronze badges 4

• 1 This is most likely caused by a plugin. Deactivate them all, and reactivate one by one. – vancoder Commented Mar 25, 2013 at 21:34
• Looks like I narrowed it down to a plugin, which tells me I must have been getting this error for a few months and just didn't notice. Pop that one liner into an answer and I'll check it off for you. Thanks @vancoder – Pat Commented Mar 25, 2013 at 22:04
• Was it a Twitter (or twitter related) plugin perchance? they've recently updated their API so a lot of plugins are failing. – vancoder Commented Mar 25, 2013 at 22:15
• No it was WP Most Popular (which for what it's worth, never seemed to work rock-solid anyways). wordpress/extend/plugins/wp-most-popular – Pat Commented Mar 25, 2013 at 22:16

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2 Answers 2

Sorted by: Reset to default 2

This is most likely caused by a plugin. Deactivate them all, and reactivate one by one.

I had same problem while developing my own plugin. Turns out that I didn't uninstall menu the right way in uninstall.php. Here is right way with hook:

function myplugin_remove_menus() {
remove_menu_page( 'myplugin-admin-menu' );
remove_menu_page( 'myplugin-admin-menu-logs' );
}
// proper way with admin_menu hook
add_action( 'admin_menu', 'myplugin_remove_menus' );