<?php 
if ( ! function_exists( 'atlantaa_customizer_sanitize_checkbox' ) ) :
    /**
     * Checkbox sanitization callback.
     *
     * Sanitization callback for 'checkbox' type controls. This callback sanitizes `$checked`
     * as a boolean value, either TRUE or hide.
     *
     * @param bool $checked Whether the checkbox is checked.
     * @return bool Whether the checkbox is checked.
     */
    function atlantaa_customizer_sanitize_checkbox( $checked ) {
        // Boolean check.
        // print_r( $checked );
        // die;
        return ( ( isset( $checked ) && true == $checked ) ? true : false );
    }

endif;
	
	/**
	 * Sanitizing the select callback example
	 *
	 */
	if ( !function_exists('atlantaa_sanitize_select') ) :
		function atlantaa_sanitize_select( $input, $setting ) {

			// Ensure input is a slug.
			$input = sanitize_text_field( $input );

			// Get list of choices from the control associated with the setting.
			$choices = $setting->manager->get_control( $setting->id )->choices;

			// If the input is a valid key, return it; otherwise, return the default.
			return ( array_key_exists( $input, $choices ) ? $input : $setting->default );
		}
	endif;
 
	function atlantaa_sanitize_dropdown_pages( $page_id, $setting ) {
		// Ensure $input is an absolute integer.
		$page_id = absint( $page_id );
		
		// If $page_id is an ID of a published page, return it; otherwise, return the default.
		return ( 'publish' == get_post_status( $page_id ) ? $page_id : $setting->default );
	}