I've got a theme that I am assembling that enables customers to alter a method by clicking an invisible button. I acquired the functionality to operate with no validation callback, consider have added text fields within the options page that need validation. However the design and style altering radio buttons aren't effective using the validation (basically don't include validation code). It appears such as the Configurations API requires validation for everything. After searching for solutions for 2 days, I could not find any answer. I am attempting to discover how you can either validate radio stations button code or skip validation on only the radio buttons. This is actually the connected code:

<?php
add_action('admin_init', 'mxs_admin_init');
add_action('admin_menu', 'mxs_admin_add_page');

function mxs_admin_add_page() {
    add_theme_page(
        'Mixin&apos; Styles Theme Options',
        'Mixin&apos; Styles Theme Options',
        'manage_options',
        'mixinstyles',
        'mxs_theme_options_page'
        );
    }

function mxs_admin_init() {
    register_setting(
        'mixinstyles_theme_options',
        'mixinstyles_theme_options',
        'mixinstyles_options_validate'
        );

    add_settings_section( // Styles section
        'mixinstyles_main',
        'Mixin&apos; Styles Style Settings',
        'mxs_theming_section_text',
        'mixinstyles'
        );
    add_settings_field(
        'custom_style_buttons',
        '<strong>Color Schemes</strong>',
        'mxs_custom_style_buttons',
        'mixinstyles',
        'mixinstyles_main'
        );
    ...
function mxs_custom_style_buttons() { 
    $options = get_option('mixinstyles_theme_options');
    //var_dump($options); //for debugging
        echo "<div class='radiobutton-wrap'> \n";
        echo "<div class='radiobutton-padding'> \n <input type='radio' id='default_style' value='default_style' name='mixinstyles_theme_options[custom_style_buttons]'" . checked( $options['custom_style_buttons'], 1 ) . " /><img src='" . get_bloginfo('template_directory') . "/images/default_screenshot.png' alt='Default style' /><br /><label for='default_style'>Default Style</label> </div> \n";
        echo "<div class='radiobutton-padding'> \n <input type='radio' id='blue_orange' value='blue_orange' name='mixinstyles_theme_options[custom_style_buttons]' /><img src='" . get_bloginfo('template_directory') . "/images/blueorange_screenshot.png' alt='Blue/Orange style' /><br /><label for='blue_orange'>Blue/Orange</label> </div> \n";
        echo "<div class='radiobutton-padding'> \n <input type='radio' id='violet_yellow' value='violet_yellow' name='mixinstyles_theme_options[custom_style_buttons]' /><img src='" . get_bloginfo('template_directory') . "/images/violetyellow_screenshot.png' alt='Violet/Yellow style' /><br /><label for='violet_yellow'>Violet/Yellow</label> </div> \n";
        echo "</div> \n";
        echo "<div class='radiobutton-wrap'> \n";
        echo "<div class='radiobutton-padding'> \n <input type='radio' id='magenta_green' value='magenta_green' name='mixinstyles_theme_options[custom_style_buttons]' /><img src='" . get_bloginfo('template_directory') . "/images/magentagreen_screenshot.png' alt='Magenta/Green style' /><br /><label for='magenta_green'>Magenta/Green</label></div> \n";
        echo "<div class='radiobutton-padding'> \n <input type='radio' id='orange_blue' value='orange_blue' name='mixinstyles_theme_options[custom_style_buttons]' /><img src='" . get_bloginfo('template_directory') . "/images/orangeblue_screenshot.png' alt='Orange/Blue style' /><br /><label for='orange_blue'>Orange/Blue</label></div> \n";
        echo "<div class='radiobutton-padding'> \n <input type='radio' id='yellow_violet' value='yellow_violet' name='mixinstyles_theme_options[custom_style_buttons]' /><img src='" . get_bloginfo('template_directory') . "/images/yellowviolet_screenshot.png' alt='Yellow/Violet style' /><br /><label for='yellow_violet'>Yellow/Violet</label></div> \n";
        echo "</div> \n";
    }
    ...

function mxs_style_switcher() {
    global $mixinstyles_theme_options;
    $options = get_option('mixinstyles_theme_options');

        switch ( $options['custom_style_buttons'] ) { //opens switch statement
            case "blue_orange":
                echo '<link rel="stylesheet" href="'; 
                bloginfo('template_directory');
                echo '/custom-styles/blue-orange.css" type="text/css" />' . "\n";
            break;
            case "violet_yellow":
                echo '<link rel="stylesheet" href="';
                bloginfo('template_directory');
                echo '/custom-styles/violet-yellow.css" type="text/css" />' . "\n";
            break;
            case "magenta_green":
                echo '<link rel="stylesheet" href="';
                bloginfo('template_directory');
                echo '/custom-styles/magenta-green.css" type="text/css" />' . "\n";
            break;
            case "orange_blue":
                echo '<link rel="stylesheet" href="';
                bloginfo('template_directory');
                echo '/custom-styles/orange-blue.css" type="text/css" />' . "\n";
            break;
            case "yellow_violet":
            echo '<link rel="stylesheet" href="';
            bloginfo('template_directory');
            echo '/custom-styles/yellow-violet.css" type="text/css" />' . "\n";
            break;
            default:
            echo '';
        } //closes switch statement
}
add_action('wp_head', 'mxs_style_switcher');
...

function mixinstyles_options_validate($input) { //opens mixinstyles_options_validate function
$options = get_option('mixinstyles_theme_options');

//for each radio button
//default
$options['default_style'] = $input['default_style'];
if ( !isset( $input['default_style'] ) ) {

    }

//blue orange
$options['blue_orange'] = $input['blue_orange'];
if ( !isset( $input['blue_orange'] ) ) {

    }

//violet yellow
$options['violet_yellow'] = $input['violet_yellow'];
if ( !isset( $input['violet_yellow'] ) ) {

    }

//magenta green
$options['magenta_green'] = $input['magenta_green'];
if ( !isset( $input['magenta_green'] ) ) {

    }

//orange blue
$options['orange_blue'] = $input['orange_blue'];
if ( !isset( $input['orange_blue'] ) ) {

    }

//yellow violet
$options['yellow_violet'] = $input['yellow_violet'];
if ( !isset( $input['yellow_violet'] ) ) {

    }
return $options;
}
?>

I've got a similar validation within the function for any check box written such as this:

//check if checkbox has been checked
$options['remove_blogtitle'] = $input['remove_blogtitle'];
if ( !isset( $input['remove_blogtitle'] ) ) {
    $input['remove_blogtitle'] = null;
    }

I have attempted this using the radio buttons however it does not work.