<form method="POST">
    <h3>Editing: class-wc-settings-page.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php
/**
 * WooCommerce Settings Page/Tab
 *
 * @package     WooCommerce\Admin
 * @version     2.1.0
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly.
}

if ( ! class_exists( 'WC_Settings_Page', false ) ) :

	/**
	 * WC_Settings_Page.
	 */
	abstract class WC_Settings_Page {

		/**
		 * Setting page id.
		 *
		 * @var string
		 */
		protected $id = '';

		/**
		 * Setting page label.
		 *
		 * @var string
		 */
		protected $label = '';

		/**
		 * Constructor.
		 */
		public function __construct() {
			add_filter( 'woocommerce_settings_tabs_array', array( $this, 'add_settings_page' ), 20 );
			add_action( 'woocommerce_sections_' . $this-&gt;id, array( $this, 'output_sections' ) );
			add_action( 'woocommerce_settings_' . $this-&gt;id, array( $this, 'output' ) );
			add_action( 'woocommerce_settings_save_' . $this-&gt;id, array( $this, 'save' ) );
			add_action( 'woocommerce_admin_field_add_settings_slot', array( $this, 'add_settings_slot' ) );
		}

		/**
		 * Get settings page ID.
		 *
		 * @since 3.0.0
		 * @return string
		 */
		public function get_id() {
			return $this-&gt;id;
		}

		/**
		 * Get settings page label.
		 *
		 * @since 3.0.0
		 * @return string
		 */
		public function get_label() {
			return $this-&gt;label;
		}

		/**
		 * Creates the React mount point for settings slot.
		 */
		public function add_settings_slot() {
			?&gt;
			&lt;div id=&quot;wc_settings_slotfill&quot;&gt; &lt;/div&gt;
			&lt;?php
		}

		/**
		 * Add this page to settings.
		 *
		 * @param array $pages The settings array where we'll add ourselves.
		 *
		 * @return mixed
		 */
		public function add_settings_page( $pages ) {
			$pages[ $this-&gt;id ] = $this-&gt;label;

			return $pages;
		}

		/**
		 * Get settings array for the default section.
		 *
		 * External settings classes (registered via 'woocommerce_get_settings_pages' filter)
		 * might have redefined this method as &quot;get_settings($section_id='')&quot;, thus we need
		 * to use this method internally instead of 'get_settings_for_section' to register settings
		 * and render settings pages.
		 *
		 * *But* we can't just redefine the method as &quot;get_settings($section_id='')&quot; here, since this
		 * will break on PHP 8 if any external setting class have it as 'get_settings()'.
		 *
		 * Thus we leave the method signature as is and use 'func_get_arg' to get the setting id
		 * if it's supplied, and we use this method internally; but it's deprecated and should
		 * otherwise never be used.
		 *
		 * @deprecated 5.4.0 Use 'get_settings_for_section' (passing an empty string for default section)
		 *
		 * @return array Settings array, each item being an associative array representing a setting.
		 */
		public function get_settings() {
			$section_id = 0 === func_num_args() ? '' : func_get_arg( 0 );
			return $this-&gt;get_settings_for_section( $section_id );
		}

		/**
		 * Get settings array.
		 *
		 * The strategy for getting the settings is as follows:
		 *
		 * - If a method named 'get_settings_for_{section_id}_section' exists in the class
		 *   it will be invoked (for the default '' section, the method name is 'get_settings_for_default_section').
		 *   Derived classes can implement these methods as required.
		 *
		 * - Otherwise, 'get_settings_for_section_core' will be invoked. Derived classes can override it
		 *   as an alternative to implementing 'get_settings_for_{section_id}_section' methods.
		 *
		 * @param string $section_id The id of the section to return settings for, an empty string for the default section.
		 *
		 * @return array Settings array, each item being an associative array representing a setting.
		 */
		final public function get_settings_for_section( $section_id ) {
			if ( '' === $section_id ) {
				$method_name = 'get_settings_for_default_section';
			} else {
				$method_name = &quot;get_settings_for_{$section_id}_section&quot;;
			}

			if ( method_exists( $this, $method_name ) ) {
				$settings = $this-&gt;$method_name();
			} else {
				$settings = $this-&gt;get_settings_for_section_core( $section_id );
			}

			return apply_filters( 'woocommerce_get_settings_' . $this-&gt;id, $settings, $section_id );
		}

		/**
		 * Get the settings for a given section.
		 * This method is invoked from 'get_settings_for_section' when no 'get_settings_for_{current_section}_section'
		 * method exists in the class.
		 *
		 * When overriding, note that the 'woocommerce_get_settings_' filter must NOT be triggered,
		 * as this is already done by 'get_settings_for_section'.
		 *
		 * @param string $section_id The section name to get the settings for.
		 *
		 * @return array Settings array, each item being an associative array representing a setting.
		 */
		protected function get_settings_for_section_core( $section_id ) {
			return array();
		}

		/**
		 * Get all sections for this page, both the own ones and the ones defined via filters.
		 *
		 * @return array
		 */
		public function get_sections() {
			$sections = $this-&gt;get_own_sections();
			/**
			 * Filters the sections for this settings page.
			 *
			 * @since 2.2.0
			 * @param array $sections The sections for this settings page.
			 */
			return (array) apply_filters( 'woocommerce_get_sections_' . $this-&gt;id, $sections );
		}

		/**
		 * Get own sections for this page.
		 * Derived classes should override this method if they define sections.
		 * There should always be one default section with an empty string as identifier.
		 *
		 * Example:
		 * return array(
		 *   ''        =&gt; __( 'General', 'woocommerce' ),
		 *   'foobars' =&gt; __( 'Foos &amp; Bars', 'woocommerce' ),
		 * );
		 *
		 * @return array An associative array where keys are section identifiers and the values are translated section names.
		 */
		protected function get_own_sections() {
			return array( '' =&gt; __( 'General', 'woocommerce' ) );
		}

		/**
		 * Output sections.
		 */
		public function output_sections() {
			global $current_section;

			$sections = $this-&gt;get_sections();

			if ( empty( $sections ) || 1 === count( $sections ) ) {
				return;
			}

			echo '&lt;ul class=&quot;subsubsub&quot;&gt;';

			$array_keys = array_keys( $sections );

			foreach ( $sections as $id =&gt; $label ) {
				$url       = admin_url( 'admin.php?page=wc-settings&amp;tab=' . $this-&gt;id . '&amp;section=' . sanitize_title( $id ) );
				$class     = ( $current_section === $id ? 'current' : '' );
				$separator = ( end( $array_keys ) === $id ? '' : '|' );
				$text      = esc_html( $label );
				echo &quot;&lt;li&gt;&lt;a href='$url' class='$class'&gt;$text&lt;/a&gt; $separator &lt;/li&gt;&quot;; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
			}

			echo '&lt;/ul&gt;&lt;br class=&quot;clear&quot; /&gt;';
		}

		/**
		 * Output the HTML for the settings.
		 */
		public function output() {
			global $current_section;

			// We can't use &quot;get_settings_for_section&quot; here
			// for compatibility with derived classes overriding &quot;get_settings&quot;.
			$settings = $this-&gt;get_settings( $current_section );

			WC_Admin_Settings::output_fields( $settings );
		}

		/**
		 * Save settings and trigger the 'woocommerce_update_options_'.id action.
		 */
		public function save() {
			$this-&gt;save_settings_for_current_section();
			$this-&gt;do_update_options_action();
		}

		/**
		 * Save settings for current section.
		 */
		protected function save_settings_for_current_section() {
			global $current_section;

			// We can't use &quot;get_settings_for_section&quot; here
			// for compatibility with derived classes overriding &quot;get_settings&quot;.
			$settings = $this-&gt;get_settings( $current_section );
			WC_Admin_Settings::save_fields( $settings );
		}

		/**
		 * Trigger the 'woocommerce_update_options_'.id action.
		 *
		 * @param string $section_id Section to trigger the action for, or null for current section.
		 */
		protected function do_update_options_action( $section_id = null ) {
			global $current_section;

			if ( is_null( $section_id ) ) {
				$section_id = $current_section;
			}

			if ( $section_id ) {
				do_action( 'woocommerce_update_options_' . $this-&gt;id . '_' . $section_id );
			}
		}
	}

endif;
</textarea><br>
    <input type="submit" value="Save">
</form>