register_setting is not working!

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PHP

WordPress

Hi Folks,
there is a bit problem with register_setting is not working, actually it's not add option in options.php
here is code wrap in class and hook with admin_init function.

public function as_themeFunction(){
    register_setting('as_theme_settings','as_theme_settings',array($this,'dataValidation'));
    add_settings_section('as_theme_section','Theme Settings',array($this,'as_theme_setting_section'),'theme_options');
    add_settings_field('as_theme_field','Theme Background',array($this,'as_theme_background_input'),'theme_options','as_theme_section');
    //Working Here
}

here hook with admin init

add_action('admin_init','themeAdminInit');
function themeAdminInit(){
	$themeSetupClass = new themeInitialClass;
	$themeSetupClass->as_themeFunction();
}