kompass/modules/KompassSettings/Controllers/SettingsPage.php

<?php

namespace Bdp\Modules\KompassSettings\Controllers;


class SettingsPage
{
    public function __construct()
    {
        add_options_page(
	        __('kompass', BDP_LV_PLUGIN_SLUG) . ' - ' . __('Settings', BDP_LV_PLUGIN_SLUG),
            __('kompass', BDP_LV_PLUGIN_SLUG) . ' - ' . __('Settings', BDP_LV_PLUGIN_SLUG),
            'manage_options',
            BDP_LV_PLUGIN_SLUG . '-Kompass-settings',
            [$this, 'option_page'],2048);
    }


    public function option_page() {
        bdp_kompass_load_plugin_textdomain();
        $showMessage = null;
	    $tab = isset($_REQUEST['tab']) ? $_REQUEST['tab'] : 'tab1';
        if (isset($_REQUEST['update_options']) && $_REQUEST['update_options'] == true) {
            switch ($tab) {
                case 'tab1':
	                update_option('bdp_calendar_categories', json_encode($_POST['category']));
	                update_option('bdp_calendar_source_url', $_POST['ical_url']);
	                $showMessage = __('The settings were saved.', BDP_LV_PLUGIN_SLUG);
                    break;

                case 'tab2':
                    update_option('kompass_seo_google_verification', $_POST['kompass_seo_google_verification']);
	                update_option('kompass_seo_bing_verification', $_POST['kompass_seo_bing_verification']);
	                $showMessage = __('The settings were saved.', BDP_LV_PLUGIN_SLUG);
                    break;
            }

	        if (null !== $showMessage) {
		        echo '<div class="notice notice-success" style="padding: 5px 10px;">';
		        echo $showMessage;
		        echo '</div>';
	        }
        }

	    bdp_kompass_load_plugin_textdomain();

        ?>

        <div class="wrap">
            <h1 class="wp-heading-inline">
                <?= __('kompass', BDP_LV_PLUGIN_SLUG); ?> - <?= __('Settings', BDP_LV_PLUGIN_SLUG); ?></h1>
            <hr class="wp-header-end">
            <?= kompass_settings_print_tab_header($tab); ?>

            <div class="tab-content">
                <?php
                switch ($tab) {
                    case 'tab1':
                        echo '<form action="admin.php?page=bdp-kompass-Kompass-settings&tab=tab1" method="post">';
	                    do_settings_sections(BDP_LV_PLUGIN_SLUG . '-calendar-settings');
                        require_once BDP_LV_PLUGIN_DIR . '/modules/calendar/Views/categories-partial.php';
	                    echo '<input type="hidden" name="tab" value="tab1" />';
	                    submit_button();
                        echo '</form>';
                        break;
                    case 'tab2':
	                    echo '<form action="admin.php?page=bdp-kompass-Kompass-settings" method="post">';
                        do_settings_sections(BDP_LV_PLUGIN_SLUG . '-seo-settings');
	                    submit_button();
	                    echo '<input type="hidden" name="tab" value="tab2" />';
	                    echo '</form>';
	                    break;
                }
                ?>
            </div>
        </div>
        <?php
    }
}