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    <h3>Editing: class-wp-customize-section.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php
/**
 * WordPress Customize Section classes
 *
 * @package WordPress
 * @subpackage Customize
 * @since 3.4.0
 */

/**
 * Customize Section class.
 *
 * A UI container for controls, managed by the WP_Customize_Manager class.
 *
 * @since 3.4.0
 *
 * @see WP_Customize_Manager
 */
#[AllowDynamicProperties]
class WP_Customize_Section {

	/**
	 * Incremented with each new class instantiation, then stored in $instance_number.
	 *
	 * Used when sorting two instances whose priorities are equal.
	 *
	 * @since 4.1.0
	 * @var int
	 */
	protected static $instance_count = 0;

	/**
	 * Order in which this instance was created in relation to other instances.
	 *
	 * @since 4.1.0
	 * @var int
	 */
	public $instance_number;

	/**
	 * WP_Customize_Manager instance.
	 *
	 * @since 3.4.0
	 * @var WP_Customize_Manager
	 */
	public $manager;

	/**
	 * Unique identifier.
	 *
	 * @since 3.4.0
	 * @var string
	 */
	public $id;

	/**
	 * Priority of the section which informs load order of sections.
	 *
	 * @since 3.4.0
	 * @var int
	 */
	public $priority = 160;

	/**
	 * Panel in which to show the section, making it a sub-section.
	 *
	 * @since 4.0.0
	 * @var string
	 */
	public $panel = '';

	/**
	 * Capability required for the section.
	 *
	 * @since 3.4.0
	 * @var string
	 */
	public $capability = 'edit_theme_options';

	/**
	 * Theme features required to support the section.
	 *
	 * @since 3.4.0
	 * @var string|string[]
	 */
	public $theme_supports = '';

	/**
	 * Title of the section to show in UI.
	 *
	 * @since 3.4.0
	 * @var string
	 */
	public $title = '';

	/**
	 * Description to show in the UI.
	 *
	 * @since 3.4.0
	 * @var string
	 */
	public $description = '';

	/**
	 * Customizer controls for this section.
	 *
	 * @since 3.4.0
	 * @var array
	 */
	public $controls;

	/**
	 * Type of this section.
	 *
	 * @since 4.1.0
	 * @var string
	 */
	public $type = 'default';

	/**
	 * Active callback.
	 *
	 * @since 4.1.0
	 *
	 * @see WP_Customize_Section::active()
	 *
	 * @var callable Callback is called with one argument, the instance of
	 *               WP_Customize_Section, and returns bool to indicate whether
	 *               the section is active (such as it relates to the URL currently
	 *               being previewed).
	 */
	public $active_callback = '';

	/**
	 * Show the description or hide it behind the help icon.
	 *
	 * @since 4.7.0
	 *
	 * @var bool Indicates whether the Section's description should be
	 *           hidden behind a help icon (&quot;?&quot;) in the Section header,
	 *           similar to how help icons are displayed on Panels.
	 */
	public $description_hidden = false;

	/**
	 * Constructor.
	 *
	 * Any supplied $args override class property defaults.
	 *
	 * @since 3.4.0
	 *
	 * @param WP_Customize_Manager $manager Customizer bootstrap instance.
	 * @param string               $id      A specific ID of the section.
	 * @param array                $args    {
	 *     Optional. Array of properties for the new Section object. Default empty array.
	 *
	 *     @type int             $priority           Priority of the section, defining the display order
	 *                                               of panels and sections. Default 160.
	 *     @type string          $panel              The panel this section belongs to (if any).
	 *                                               Default empty.
	 *     @type string          $capability         Capability required for the section.
	 *                                               Default 'edit_theme_options'
	 *     @type string|string[] $theme_supports     Theme features required to support the section.
	 *     @type string          $title              Title of the section to show in UI.
	 *     @type string          $description        Description to show in the UI.
	 *     @type string          $type               Type of the section.
	 *     @type callable        $active_callback    Active callback.
	 *     @type bool            $description_hidden Hide the description behind a help icon,
	 *                                               instead of inline above the first control.
	 *                                               Default false.
	 * }
	 */
	public function __construct( $manager, $id, $args = array() ) {
		$keys = array_keys( get_object_vars( $this ) );
		foreach ( $keys as $key ) {
			if ( isset( $args[ $key ] ) ) {
				$this-&gt;$key = $args[ $key ];
			}
		}

		$this-&gt;manager = $manager;
		$this-&gt;id      = $id;
		if ( empty( $this-&gt;active_callback ) ) {
			$this-&gt;active_callback = array( $this, 'active_callback' );
		}
		self::$instance_count += 1;
		$this-&gt;instance_number = self::$instance_count;

		$this-&gt;controls = array(); // Users cannot customize the $controls array.
	}

	/**
	 * Check whether section is active to current Customizer preview.
	 *
	 * @since 4.1.0
	 *
	 * @return bool Whether the section is active to the current preview.
	 */
	final public function active() {
		$section = $this;
		$active  = call_user_func( $this-&gt;active_callback, $this );

		/**
		 * Filters response of WP_Customize_Section::active().
		 *
		 * @since 4.1.0
		 *
		 * @param bool                 $active  Whether the Customizer section is active.
		 * @param WP_Customize_Section $section WP_Customize_Section instance.
		 */
		$active = apply_filters( 'customize_section_active', $active, $section );

		return $active;
	}

	/**
	 * Default callback used when invoking WP_Customize_Section::active().
	 *
	 * Subclasses can override this with their specific logic, or they may provide
	 * an 'active_callback' argument to the constructor.
	 *
	 * @since 4.1.0
	 *
	 * @return true Always true.
	 */
	public function active_callback() {
		return true;
	}

	/**
	 * Gather the parameters passed to client JavaScript via JSON.
	 *
	 * @since 4.1.0
	 *
	 * @return array The array to be exported to the client as JSON.
	 */
	public function json() {
		$array                   = wp_array_slice_assoc( (array) $this, array( 'id', 'description', 'priority', 'panel', 'type', 'description_hidden' ) );
		$array['title']          = html_entity_decode( $this-&gt;title, ENT_QUOTES, get_bloginfo( 'charset' ) );
		$array['content']        = $this-&gt;get_content();
		$array['active']         = $this-&gt;active();
		$array['instanceNumber'] = $this-&gt;instance_number;

		if ( $this-&gt;panel ) {
			/* translators: &amp;#9656; is the unicode right-pointing triangle. %s: Section title in the Customizer. */
			$array['customizeAction'] = sprintf( __( 'Customizing &amp;#9656; %s' ), esc_html( $this-&gt;manager-&gt;get_panel( $this-&gt;panel )-&gt;title ) );
		} else {
			$array['customizeAction'] = __( 'Customizing' );
		}

		return $array;
	}

	/**
	 * Checks required user capabilities and whether the theme has the
	 * feature support required by the section.
	 *
	 * @since 3.4.0
	 *
	 * @return bool False if theme doesn't support the section or user doesn't have the capability.
	 */
	final public function check_capabilities() {
		if ( $this-&gt;capability &amp;&amp; ! current_user_can( $this-&gt;capability ) ) {
			return false;
		}

		if ( $this-&gt;theme_supports &amp;&amp; ! current_theme_supports( ...(array) $this-&gt;theme_supports ) ) {
			return false;
		}

		return true;
	}

	/**
	 * Get the section's content for insertion into the Customizer pane.
	 *
	 * @since 4.1.0
	 *
	 * @return string Contents of the section.
	 */
	final public function get_content() {
		ob_start();
		$this-&gt;maybe_render();
		return trim( ob_get_clean() );
	}

	/**
	 * Check capabilities and render the section.
	 *
	 * @since 3.4.0
	 */
	final public function maybe_render() {
		if ( ! $this-&gt;check_capabilities() ) {
			return;
		}

		/**
		 * Fires before rendering a Customizer section.
		 *
		 * @since 3.4.0
		 *
		 * @param WP_Customize_Section $section WP_Customize_Section instance.
		 */
		do_action( 'customize_render_section', $this );
		/**
		 * Fires before rendering a specific Customizer section.
		 *
		 * The dynamic portion of the hook name, `$this-&gt;id`, refers to the ID
		 * of the specific Customizer section to be rendered.
		 *
		 * @since 3.4.0
		 */
		do_action( &quot;customize_render_section_{$this-&gt;id}&quot; );

		$this-&gt;render();
	}

	/**
	 * Render the section UI in a subclass.
	 *
	 * Sections are now rendered in JS by default, see WP_Customize_Section::print_template().
	 *
	 * @since 3.4.0
	 */
	protected function render() {}

	/**
	 * Render the section's JS template.
	 *
	 * This function is only run for section types that have been registered with
	 * WP_Customize_Manager::register_section_type().
	 *
	 * @since 4.3.0
	 *
	 * @see WP_Customize_Manager::render_template()
	 */
	public function print_template() {
		?&gt;
		&lt;script type=&quot;text/html&quot; id=&quot;tmpl-customize-section-&lt;?php echo $this-&gt;type; ?&gt;&quot;&gt;
			&lt;?php $this-&gt;render_template(); ?&gt;
		&lt;/script&gt;
		&lt;?php
	}

	/**
	 * An Underscore (JS) template for rendering this section.
	 *
	 * Class variables for this section class are available in the `data` JS object;
	 * export custom variables by overriding WP_Customize_Section::json().
	 *
	 * @since 4.3.0
	 *
	 * @see WP_Customize_Section::print_template()
	 */
	protected function render_template() {
		?&gt;
		&lt;li id=&quot;accordion-section-{{ data.id }}&quot; class=&quot;accordion-section control-section control-section-{{ data.type }}&quot;&gt;
			&lt;h3 class=&quot;accordion-section-title&quot;&gt;
				&lt;button type=&quot;button&quot; class=&quot;accordion-trigger&quot; aria-expanded=&quot;false&quot; aria-controls=&quot;{{ data.id }}-content&quot;&gt;
					{{ data.title }}
				&lt;/button&gt;
			&lt;/h3&gt;
			&lt;ul class=&quot;accordion-section-content&quot; id=&quot;{{ data.id }}-content&quot;&gt;
				&lt;li class=&quot;customize-section-description-container section-meta &lt;# if ( data.description_hidden ) { #&gt;customize-info&lt;# } #&gt;&quot;&gt;
					&lt;div class=&quot;customize-section-title&quot;&gt;
						&lt;button class=&quot;customize-section-back&quot; tabindex=&quot;-1&quot;&gt;
							&lt;span class=&quot;screen-reader-text&quot;&gt;
								&lt;?php
								/* translators: Hidden accessibility text. */
								_e( 'Back' );
								?&gt;
							&lt;/span&gt;
						&lt;/button&gt;
						&lt;h3&gt;
							&lt;span class=&quot;customize-action&quot;&gt;
								{{{ data.customizeAction }}}
							&lt;/span&gt;
							{{ data.title }}
						&lt;/h3&gt;
						&lt;# if ( data.description &amp;&amp; data.description_hidden ) { #&gt;
							&lt;button type=&quot;button&quot; class=&quot;customize-help-toggle dashicons dashicons-editor-help&quot; aria-expanded=&quot;false&quot;&gt;&lt;span class=&quot;screen-reader-text&quot;&gt;
								&lt;?php
								/* translators: Hidden accessibility text. */
								_e( 'Help' );
								?&gt;
							&lt;/span&gt;&lt;/button&gt;
							&lt;div class=&quot;description customize-section-description&quot;&gt;
								{{{ data.description }}}
							&lt;/div&gt;
						&lt;# } #&gt;

						&lt;div class=&quot;customize-control-notifications-container&quot;&gt;&lt;/div&gt;
					&lt;/div&gt;

					&lt;# if ( data.description &amp;&amp; ! data.description_hidden ) { #&gt;
						&lt;div class=&quot;description customize-section-description&quot;&gt;
							{{{ data.description }}}
						&lt;/div&gt;
					&lt;# } #&gt;
				&lt;/li&gt;
			&lt;/ul&gt;
		&lt;/li&gt;
		&lt;?php
	}
}

/** WP_Customize_Themes_Section class */
require_once ABSPATH . WPINC . '/customize/class-wp-customize-themes-section.php';

/** WP_Customize_Sidebar_Section class */
require_once ABSPATH . WPINC . '/customize/class-wp-customize-sidebar-section.php';

/** WP_Customize_Nav_Menu_Section class */
require_once ABSPATH . WPINC . '/customize/class-wp-customize-nav-menu-section.php';
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