/*
* Sanitize Checkbox
*/

// Source: https://github.com/FlagshipWP/flagship-library/blob/develop/customizer/classes/customizer-base.php
	/**
	 * Sanitize a checkbox to only allow 0 or 1
	 *
	 * @since  1.2.0
	 * @access public
	 * @param  $input
	 * @return int
	 */
	public function sanitize_checkbox( $input ) {
		return ( 1 === absint( $input ) ) ? 1 : 0;
	}
	
	//Source: https://github.com/WPTRT/code-examples/blob/master/customizer/sanitization-callbacks.php
	
	/**
 * Checkbox Sanitization Callback 
 * 
 * Sanitization callback for 'checkbox' type controls.
 * This callback sanitizes $input as a Boolean value, either
 * TRUE or FALSE.
 */
function theme_slug_sanitize_checkbox( $input ) {
	
	// Boolean check 
	return ( ( isset( $input ) && true == $input ) ? true : false );
}