Genesis: PHP: create widget areas

functions.php

//add php functionality in text widget
add_filter('widget_text', 'php_text', 99);

function php_text($text) {
 if (strpos($text, '<' . '?') !== false) {
 ob_start();
 eval('?' . '>' . $text);
 $text = ob_get_contents();
 ob_end_clean();
 }
 return $text;
}

//add widget areas 
register_sidebar( array(
    'id' => 'slider',
    'name' => 'Slider',
    'description' => 'Displays responsive slider after header',
    'after_widget' => '<div class="shadow-left"></div>'
) );

register_sidebar( array(
    'id' => 'fixed-chat-tab',
    'name' => 'Fixed Chat Tab',
    'description' => 'Place Live Person chat button code here.',
    'before_widget' => '<div id="fixed-chat" class="">',
    'after_widget' => '</div>',
) );


//display widget area
add_action( 'genesis_before_header', 'Fixed' );
/** Loads a new sidebar after the header */
function fixed() {
 
    echo '<div class="fixed-chat-tab">';
        dynamic_sidebar( 'fixed-chat-tab' );
    echo '</div>';
 
}


//display widget area
add_action( 'genesis_after_header', 'Slider' );
/** Loads a new sidebar after the header */
function slider() {
 
    echo '<div class="slider">';
        dynamic_sidebar( 'slider' );
    echo '</div>';
 
}