Wordpress undefined index notice in child theme

Question

When I add items to my menus in my wordpress child theme I get this error;

Notice: Undefined index: custom_meta_box_nonce in /Users/x/Documents/Apart-1/website 3/wp-content/themes/wp-foundation/functions.php on line 546

A link to my full base theme's function file is here; (again, I did not touch/write/ that.) http://codepad.org/dAx0DlLz

This is around line 546 in my base theme;

// Save the Data

function save_homepage_meta($post_id) {
global $custom_meta_fields;

// verify nonce  
if (!wp_verify_nonce($_POST['custom_meta_box_nonce'], basename(__FILE__)))  
    return $post_id;  
// check autosave  
if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE)  
    return $post_id;  
// check permissions  
if ('page' == $_POST['post_type']) {  
    if (!current_user_can('edit_page', $post_id))  
        return $post_id;  
    } elseif (!current_user_can('edit_post', $post_id)) {  
        return $post_id;  
}

And this is exactly on line 546;

if (!wp_verify_nonce($_POST['custom_meta_box_nonce'], basename(__FILE__)))

And this is in my child theme's function file;

    <?php
ob_start();
if ( function_exists( 'add_image_size' ) ) { add_image_size( 'orbit-custom', 920, 300 ); }

/**
 * Add a search bar to the navigation menu.
 *
 * @since Twenty Twelve 1.0
 */
function menu_search($items){
    $search = '<li class="menusearch">';
    $search .= '<form method="get" id="searchform" action="/">';
    $search .= '<input type="text" class="field" name="s" id="s" placeholder="Search" />';
    $search .= '<input type="submit" class="menusubmit" name="submit" id="searchsubmit" value="Search" />';
    $search .= '</form>';
    $search .= '</li>';

    return $items . $search;
}
add_filter('wp_nav_menu_items','menu_search');

// This adds multiple menu locations
add_action( 'init', 'register_multiple_menus' );
function register_multiple_menus() {
    register_nav_menus(
        array(
            'footer-nav-mid' =>  'Middle Footer Navigation',
            'footer-nav-left' =>  'Left Footer Navigation',
            'footer-nav-right' =>  'Right Footer Navigation'
        )
    );
}

 ?>

Why am I getting this error? I did not change anything to my base theme's function file and did not get this error before adding the multiple menu thing to my child's function file.

are u adding nonce to the custom meta box? show the metabox as well — B L Praveen
I added a link to the full functions file of the base theme I used, I did not edit that functions file though, it came complete with the base theme called 'wp-foundation'. — Jane
error appeared in save_homepage_meta when u added to search and nav functions to child theme?code you added will not affect in anyway to the save_post... check the plugin must be overided — B L Praveen
I did not add any plugins that have anything to do with the menus or saving posts... The error appears in the screen where you can add new menus, the moment I click save or add an item to the menu. — Jane
if you try to save the menu ..then it is also saving post..it should not happen.. something is hooked in some page check!.. — B L Praveen

brasofilo brasofilo · Accepted Answer · 2013-09-07T14:00:27

For undefined index notices normally the solution is using isset():

if ( 
    !isset( $_POST['custom_meta_box_nonce'] ) 
    || !wp_verify_nonce( $_POST['custom_meta_box_nonce'], basename(__FILE__) ) 
)

Wordpress undefined index notice in child theme

1 Answers