Obtener valores para metaboxes en WordPress

function wporg_custom_box_html( $post ) {
    $value = get_post_meta( $post->ID, '_wporg_meta_key', true );
    ?>
    <label for="wporg_field">Description for this field</label>
    <select name="wporg_field" id="wporg_field" class="postbox">
        <option value="">Select something...</option>
        <option value="something" <?php selected( $value, 'something' ); ?>>Something</option>
        <option value="else" <?php selected( $value, 'else' ); ?>>Else</option>
    </select>
    <?php
}
Outrageous Ostrich