add_action( ‘personal_options_update’, ‘my_save_extra_profile_fields’ );
add_action( ‘edit_user_profile_update’, ‘my_save_extra_profile_fields’ );

function my_save_extra_profile_fields( $user_id ) {

if ( !current_user_can( ‘edit_user’, $user_id ) )
return false;

/* Copy and paste this line for additional fields. Make sure to change ‘twitter’ to the field ID. */
update_usermeta( $user_id, ‘name’, $_POST[‘name’] );
}

Thanks

My problem is that I can not create more custom fields inside my custom meta boxes.

I have this:

function add_custom_meta_box_productos() {
    add_meta_box(
        'custom_meta_box_productos', // $id
        backend_product_metabox_title, // $title
        'show_custom_meta_box_productos', // $callback
        'products', // $page
        'normal', // $context
        'high'); // $priority
}
add_action('add_meta_boxes', 'add_custom_meta_box_productos');

    // Field Array
    $prefix_productos = 'custom_';
    $custom_meta_fields_productos = array(  

array(
'label'=> 'Label 1',
'desc'  => 'Title',
'id'    => 'label1',
'type'  => 'text'
),
array(
'label'=> 'Label 2',
'desc'  => 'Title',
'id'    => 'label2',
'type'  => 'text'
),
array(
'label'=> 'Label 3',
'desc'  => 'Title',
'id'    => 'label3',
'type'  => 'text'
),
array(
'label'=> 'Label 4',
'desc'  => 'Title',
'id'    => 'label4',
'type'  => 'text'
),
);

// The Callback
function show_custom_meta_box_productos() {
global $custom_meta_fields_productos, $post;
// Use nonce for verification
echo '<input type="hidden" name="custom_meta_box_nonce" value="'.wp_create_nonce(basename(__FILE__)).'" />';  

    // Begin the field table and loop
    echo '<table class="form-table">';
    foreach ($custom_meta_fields_productos as $field_producto) {
        // get value of this field if it exists for this post
        $meta_producto = get_post_meta($post->ID, $field_producto['id'], true);
        // begin a table row with
        echo '<tr>
                <th><label for="'.$field_producto['id'].'">'.$field_producto['label'].'</label></th>
                <td>';
switch($field_producto['type']) {

// text
					case 'text':
						echo '<input type="text" name="'.$field_producto['id'].'" id="'.$field_producto['id'].'" value="'.$meta_producto.'" size="30" />
							<br /><span class="description">'.$field_producto['desc'].'</span>';
					break;
                } //end switch
        echo '</td></tr>';
    } // end foreach
    echo '</table>'; // end table
}

// Save the Data
function save_custom_meta_producto($post_id) {
    global $custom_meta_fields_productos;  

    // 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;
    }  

    // loop through fields and save the data
    foreach ($custom_meta_fields_producto as $field_producto) {
        $old = get_post_meta($post_id, $field_producto['id'], true);
        $new = $_POST[$field_producto['id']];
        if ($new && $new != $old) {
            update_post_meta($post_id, $field_producto['id'], $new);
        } elseif ('' == $new && $old) {
            delete_post_meta($post_id, $field_producto['id'], $old);
        }
    } // end foreach
}
add_action('save_post', 'save_custom_meta_producto');

First, I create the metabox and create an array with 4 different input text. But when I introduce information and clic in publish, they do not save nothing. The problem is that WordPress does not create the id custom field for each input text. This is a piece of code but I have more fields in this metabox and save the information properly. But, If I create new fields, these fields do not save the information. Any idea?

Thanks!

In my WordPress backend I have some custom posts and, in one of them, I want to display in a dropdown field some posts related with but ordered by post type. I want to display something like this.

<select multiple="multiple" style="height:200px; width:300px"> <optgroup label="Productos"> <option>Producto 1</option> <option>Producto 2</option> <option>Producto 3</option> <option>Producto 4</option> <option>Producto 5</option> <option>Producto 6</option> </optgroup> <optgroup label="Paso 1"> <option>Subpagina 1</option> <option>Subpagina 2</option> <option>Subpagina 3</option> </optgroup> </optgroup> <optgroup label="Paso 2"> <option>Subpagina 1</option> <option>Subpagina 2</option> <option>Subpagina 3</option> </optgroup> </optgroup> <optgroup label="Paso 3"> <option>Subpagina 1</option> <option>Subpagina 2</option> <option>Subpagina 3</option> </optgroup> </select>

Here is the code that displays all of posts that I want but without order. I figure out that I have to use the id of the custom post type but I do not how to, any idea?

Note: I`ll like to save more than one post at the same time.

// Add the Meta Box  

function add_custom_meta_box_related() {
    add_meta_box(
        'custom_meta_box_related', // $id
        'Related Information', // $title
        'show_custom_meta_box_related', // $callback
        'related', // $page
        'normal', // $context
        'high'); // $priority
}
add_action('add_meta_boxes', 'add_custom_meta_box_related');

    // Field Array
    $prefix_related = 'custom_';
    $custom_meta_fields_related = array(  

		array(
			'label' => 'Related Items',
			'desc' => 'Select a related item(s)',
			'id'    =>  $prefix_materiales.'post_id',
			'type' => 'post_list',
			'post_type' => array('products','paso1','paso2','paso3','paso4','compra'),
)
    );  

	// The Callback
function show_custom_meta_box_related() {
global $custom_meta_fields_related, $post;
// Use nonce for verification
echo '<input type="hidden" name="custom_meta_box_nonce" value="'.wp_create_nonce(basename(__FILE__)).'" />';  

    // Begin the field table and loop
    echo '<table class="form-table">';
    foreach ($custom_meta_fields_related as $field_related) {
        // get value of this field if it exists for this post
        $meta_related = get_post_meta($post->ID, $field_related['id'], true);
        // begin a table row with
        echo '<tr>
                <th><label for="'.$field_related['id'].'">'.$field_related['label'].'</label></th>
                <td>';
                switch($field_related['type']) {
                    // case items will go here 

					// post_list
					case 'post_list':
					$items = get_posts( array (
						'post_type' => $field_related['post_type'],
						'posts_per_page' => -1
					));
					echo '<select multiple name="'.$field_related['id'].'" id="'.$field_related['id'].'">
					<option value="">Select One or more</option>'; // Select One
					foreach($items as $item) {
						echo '<option value="'.$item->ID.'"',$meta_related == $item->ID ? ' selected="selected"' : '','> '.$item->post_title.'</option>';
					} // end foreach
					echo '</select><br /><span class="description">'.$field_related['desc'].'</span>';
					break;
                } //end switch
        echo '</td></tr>';
    } // end foreach
    echo '</table>'; // end table
}

// Save the Data
function save_custom_meta_related($post_id) {
    global $custom_meta_fields_related;  

    // 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;
    }  

    // loop through fields and save the data
    foreach ($custom_meta_fields_related as $field_related) {
        $old = get_post_meta($post_id, $field_related['id'], true);
        $new = $_POST[$field_related['id']];
        if ($new && $new != $old) {
            update_post_meta($post_id, $field_related['id'], $new);
        } elseif ('' == $new && $old) {
            delete_post_meta($post_id, $field_related['id'], $old);
        }
    } // end foreach
}
add_action('save_post', 'save_custom_meta_related');

Thanks in advance

Well, I have a little problem with my custom meta box. I create a custom post which includes a custom meta field dropdown. The dropdown displays the title of the posts from another custom posts that I want to link with when save. But when I clic on publish the dropdown doesn′t save.

Here is my code.

Here I create my custom post:

function my_custom_post_category_product() {
	$labels = array(
		'name'               => _x( 'Categories Products', 'post type general name' ),
		'singular_name'      => _x( 'Categories Products', 'post type singular name' ),
		'add_new'            => _x( 'Add New' ),
		'add_new_item'       => __( 'Add New Categories Products' ),
		'edit_item'          => __( 'Edit Categories Products' ),
		'new_item'           => __( 'New Categories Products' ),
		'all_items'          => __( 'All Categories Products' ),
		'view_item'          => __( 'View Categories Products' ),
		'search_items'       => __( 'Search Categories Products' ),
		'not_found_in_trash' => __( 'No Categories Products found in the Trash' ),
		'not_found'          => __( 'No Categories Products found' ),
		'parent_item_colon'  => '',
		'menu_name'          => 'Categoria Producto'
	);
	$args = array(
		'labels'        => $labels,
		'description'   => 'Holds our categories specific data',
		'public'        => true,
		'menu_position' => 100,
		'supports'      => array( 'title', 'editor', 'thumbnail', 'excerpt', 'comments' ),
		'has_archive'   => true,
		'taxonomies' => array('category'),
	);
	register_post_type( 'category_product', $args );
}
add_action( 'init', 'my_custom_post_category_product' );

function my_updated_messages_category_product( $messages ) {
	global $post, $post_ID;
	$messages['categories'] = array(
		0 => '',
		1 => sprintf( __('Categories Products updated. <a href="%s">View Categories Products</a>'), esc_url( get_permalink($post_ID) ) ),
		2 => __('Custom field updated.'),
		3 => __('Custom field deleted.'),
		4 => __('Categories updated.'),
		5 => isset($_GET['revision']) ? sprintf( __('Categories Products restored to revision from %s'), wp_post_revision_title( (int) $_GET['revision'], false ) ) : false,
		6 => sprintf( __('Categories Products published. <a href="%s">View Categories Products</a>'), esc_url( get_permalink($post_ID) ) ),
		7 => __('Categories Products saved.'),
		8 => sprintf( __('Categories Products submitted. <a target="_blank" href="%s">Preview Categories Products</a>'), esc_url( add_query_arg( 'preview', 'true', get_permalink($post_ID) ) ) ),
		9 => sprintf( __('Categories Products scheduled for: <strong>%1$s</strong>. <a target="_blank" href="%2$s">Preview Categories Products</a>'), date_i18n( __( 'M j, Y @ G:i' ), strtotime( $post->post_date ) ), esc_url( get_permalink($post_ID) ) ),
		10 => sprintf( __('Categories Products draft updated. <a target="_blank" href="%s">Preview Categories Products</a>'), esc_url( add_query_arg( 'preview', 'true', get_permalink($post_ID) ) ) ),
	);
	return $messages;
}
add_filter( 'post_updated_messages', 'my_updated_messages_category_product' );

And then the function to create the custom meta box and save the data:

add_action('add_meta_boxes', 'product_post_options_box',10,2);
/* saved the data */
add_action( 'save_post', 'save_product_post_options_box' );

function product_post_options_box($post_type, $post) {
    if ('category_product' == $post_type) //only add to your post type
        add_meta_box('post_info', 'Product Information', 'product_post_info', 'category_product', 'side', 'high');
}

function product_post_info() {
    global $post;
    /* List the posts*/
    $posts = get_posts( array(
        'post_type'      => array( 'categories' ),
        'posts_per_page' => -1
        )
    );
    //get saved data
    $saved = get_post_meta($post->ID,'_categories',true);
    if (empty($saved))
        $saved = array();
		//var_dump($saved);

    echo '<select name="categories" id="categories" multiple>'.
        '<option value="" selected="selected">Select a post</option>';
    foreach ($posts as $p) {
        $link = get_permalink( $p->ID);
        $selected = (in_array($link,$saved)) ? ' selected="selected"' : '';
        echo '<option'.$selected.' value="'.$link.'">'.get_the_title( $p->ID ).'</option>';
    }
    echo '</select>';

    // Use nonce for verification
    wp_nonce_field( plugin_basename( __FILE__ ), 'categories_nonce' );

}

function save_product_post_options_box($post_ID){
    // verify if this is an auto save routine.
    // If it is our form has not been submitted, so we dont want to do anything
    if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )
        return;

    // First we need to check if the current user is authorised to do this action.
    if ( ! current_user_can( 'edit_post', $post_ID ) )
        return;

    // Secondly we need to check if the user intended to change this value.
    if ( ! isset( $_POST['categories_nonce'] ) || ! wp_verify_nonce( $_POST['categories_nonce'], plugin_basename( __FILE__ ) ) )
      return;

    // Thirdly check the post type
    if ('categories' != get_post_type($post_ID))
        return;

    $mydata =  $_POST['categories'];

    // Do something with $mydata
    // either using
    update_post_meta( $post_ID, '_category_product', $mydata, true);
}

At this point:

//get saved data
    $saved = get_post_meta($post->ID,'_categories',true);
    if (empty($saved))
        $saved = array();
		//var_dump($saved);

If I show $saved in order to see what it contains it shows the custom posts from WordPress. I have no idea where is the bug. Any idea?

Note: The dropdown must save multiple options (1 post or more)

Thanks a lot!