Wp Customizer Icon

Instalacja

1. Upload plugin-name.php to the /wp-content/plugins/ directory
2. Activate the plugin through the 'Plugins’ menu in WordPress
3. Now create customizer icon field by using WPCI_Customize_Icon_Control class in your theme.

Example:-

/**
 * Customizer register
 */
add_action( 'customize_register', 'mytheme_customize_register' );
function mytheme_customize_register( $wp_customize ) {
    $wp_customize->add_section(
            'test_section',
            array(
                'title' => __('Icon', 'wp-customizer-icon'),
                'priority' => 5,
            )
        );
    $wp_customize->add_setting(
            'test_icon',
            array(
                'default' => 'mdi mdi-access-point',
                'transport' => 'refresh',
            )
        );
    $wp_customize->add_control(
            new WPCI_Customize_Icon_Control(
                $wp_customize,
                'test_icon',
                array(
                    'type'      => 'icon',
                    'label' => __('Test Icon', 'wp-customizer-icon'),
                    'section' => 'test_section',
                    'priority' => 10,
                ))
    );
}

/**
 * Get Icon Class
 */
$icon_cls = get_theme_mod('test_icon');
echo '<i class="'.esc_attr( $icon_cls ).'"></i>';

Add extra icon library by filter hook named WPCI_customizer_icons.
Example:-

add_action('WPCI_customizer_icons','push_icon');
function push_icon($icon_array){
    $new_icon = array_merge(
        array(
            'fa fa-facebook' =>'fa fa-facebook',
            'fa fa-twitter' =>'fa fa-twitter'
        ),$icon_array
    );
    return $new_icon;
}