single-post-settings.php

<?php
if ( ! function_exists( 'inspiry_single_post_customizer' ) ) :
    function inspiry_single_post_customizer( WP_Customize_Manager $wp_customize ) {
        
        /**
         * Single Post Section
         */
        $wp_customize->add_section( 'inspiry_single_post_options', array (
            'title' => __( 'Single Post', 'inspiry' ),
            'priority' => 123,
        ) );

        /* Post Layout */
        $wp_customize->add_setting( 'inspiry_post_layout', array (
            'default' => 'one',
        ) );
        $wp_customize->add_control( 'inspiry_post_layout', array (
            'label' => __( 'Single Post Layout', 'inspiry' ),
            'type' => 'radio',
            'section' => 'inspiry_single_post_options',
            'choices' => array (
                'one' => __( 'Full Width Layout', 'inspiry' ),
                'two' => __( 'Layout With Sidebar', 'inspiry' ),
            )
        ) );
        
    }
    add_action( 'customize_register', 'inspiry_single_post_customizer' );
endif;