系统维护工具

名称	大小	权限	修改时间
..	-	-	-
images	[目录]	dr-xr-xr-x	2026-05-12 09:19
admin-filters.php	7.85 KB	-rw-r--r--	2025-04-15 23:32
admin.php	3.54 KB	-rw-r--r--	2023-12-03 20:05
ajax-actions.php	148.08 KB	-rw-r--r--	2025-04-15 23:32
bookmark.php	11.45 KB	-rw-r--r--	2025-04-15 23:32
class-automatic-upgrader-skin.php	3.58 KB	-rw-r--r--	2023-12-03 20:05
class-bulk-plugin-upgrader-skin.php	2.53 KB	-rw-r--r--	2024-07-17 02:55
class-bulk-theme-upgrader-skin.php	2.60 KB	-rw-r--r--	2024-07-17 02:55
class-bulk-upgrader-skin.php	6.59 KB	-rw-r--r--	2024-07-17 02:55
class-core-upgrader.php	14.83 KB	-rw-r--r--	2024-11-12 23:16
class-custom-background.php	21.14 KB	-rw-r--r--	2025-04-15 23:32
class-custom-image-header.php	48.14 KB	-rw-r--r--	2025-04-15 23:32
class-file-upload-upgrader.php	4.96 KB	-rw-r--r--	2024-07-17 02:55
class-ftp-pure.php	5.30 KB	-rw-r--r--	2019-11-01 15:57
class-ftp-sockets.php	9.23 KB	-rw-r--r--	2023-12-03 20:05
class-ftp.php	26.73 KB	-rw-r--r--	2025-04-15 23:32
class-language-pack-upgrader-skin.php	2.80 KB	-rw-r--r--	2024-07-17 02:55
class-language-pack-upgrader.php	15.20 KB	-rw-r--r--	2024-07-17 02:55
class-pclzip.php	192.08 KB	-rw-r--r--	2025-04-15 23:32
class-plugin-installer-skin.php	11.77 KB	-rw-r--r--	2024-11-12 23:16
class-plugin-upgrader-skin.php	3.20 KB	-rw-r--r--	2023-12-03 20:05
class-plugin-upgrader.php	22.70 KB	-rw-r--r--	2024-11-12 23:16
class-theme-installer-skin.php	12.44 KB	-rw-r--r--	2025-04-15 23:32
class-theme-upgrader-skin.php	4.08 KB	-rw-r--r--	2024-04-02 23:52
class-theme-upgrader.php	26.08 KB	-rw-r--r--	2024-11-12 23:16
class-walker-category-checklist.php	4.97 KB	-rw-r--r--	2025-08-14 12:58
class-walker-nav-menu-checklist.php	5.50 KB	-rw-r--r--	2023-12-03 20:05
class-walker-nav-menu-edit.php	13.85 KB	-rw-r--r--	2024-11-12 23:16
class-wp-ajax-upgrader-skin.php	4.09 KB	-rw-r--r--	2023-12-03 20:05
class-wp-application-passwords-list-table.php	6.79 KB	-rw-r--r--	2024-04-02 23:52
class-wp-automatic-updater.php	60.45 KB	-rw-r--r--	2025-04-15 23:32
class-wp-comments-list-table.php	32.28 KB	-rw-r--r--	2025-04-15 23:32
class-wp-community-events.php	18.33 KB	-rw-r--r--	2023-12-03 20:05
class-wp-debug-data.php	65.06 KB	-rw-r--r--	2025-04-15 23:32
class-wp-filesystem-base.php	23.84 KB	-rw-r--r--	2024-04-02 23:52
class-wp-filesystem-direct.php	18.48 KB	-rw-r--r--	2024-04-02 23:52
class-wp-filesystem-ftpext.php	22.56 KB	-rw-r--r--	2024-04-02 23:52
class-wp-filesystem-ftpsockets.php	18.05 KB	-rw-r--r--	2024-04-02 23:52
class-wp-filesystem-ssh2.php	22.76 KB	-rw-r--r--	2024-04-02 23:52
class-wp-importer.php	7.32 KB	-rw-r--r--	2025-04-15 23:32
class-wp-internal-pointers.php	4.47 KB	-rw-r--r--	2023-12-03 20:05
class-wp-links-list-table.php	9.02 KB	-rw-r--r--	2024-11-12 23:16
class-wp-list-table-compat.php	2.27 KB	-rw-r--r--	2020-11-14 17:54
class-wp-list-table.php	51.67 KB	-rw-r--r--	2025-04-15 23:32
class-wp-media-list-table.php	25.29 KB	-rw-r--r--	2025-04-15 23:32
class-wp-ms-sites-list-table.php	21.50 KB	-rw-r--r--	2025-04-15 23:32
class-wp-ms-themes-list-table.php	27.77 KB	-rw-r--r--	2025-04-15 23:32
class-wp-ms-users-list-table.php	15.35 KB	-rw-r--r--	2025-04-15 23:32
class-wp-plugin-install-list-table.php	24.21 KB	-rw-r--r--	2024-11-12 23:16
class-wp-plugins-list-table.php	56.43 KB	-rw-r--r--	2024-11-12 23:16
class-wp-post-comments-list-table.php	2.25 KB	-rw-r--r--	2023-12-03 20:05
class-wp-posts-list-table.php	62.71 KB	-rw-r--r--	2025-04-15 23:32
class-wp-privacy-data-export-requests-list-table.php	5.43 KB	-rw-r--r--	2023-12-03 20:05
class-wp-privacy-data-removal-requests-list-table.php	5.58 KB	-rw-r--r--	2023-12-03 20:05
class-wp-privacy-policy-content.php	31.86 KB	-rw-r--r--	2025-04-15 23:32
class-wp-privacy-requests-table-compiler.php	369.00 B	-rw-r--r--	2025-04-15 23:32
class-wp-privacy-requests-table.php	14.06 KB	-rw-r--r--	2025-04-15 23:32
class-wp-screen.php	36.45 KB	-rw-r--r--	2024-07-17 02:55
class-wp-site-health-auto-updates.php	14.88 KB	-rw-r--r--	2025-04-15 23:32
class-wp-site-health.php	119.49 KB	-rw-r--r--	2025-04-15 23:32
class-wp-site-icon.php	6.26 KB	-rw-r--r--	2024-04-02 23:52
class-wp-terms-list-table.php	20.69 KB	-rw-r--r--	2024-07-17 02:55
class-wp-theme-install-list-table.php	15.23 KB	-rw-r--r--	2025-04-15 23:32
class-wp-themes-list-table.php	10.11 KB	-rw-r--r--	2025-04-15 23:32
class-wp-upgrader-skin.php	6.94 KB	-rw-r--r--	2024-07-17 02:55
class-wp-upgrader-skins.php	1.44 KB	-rw-r--r--	2019-10-08 19:19
class-wp-upgrader.php	46.88 KB	-rw-r--r--	2025-05-01 00:07
class-wp-users-list-table.php	18.61 KB	-rw-r--r--	2024-04-02 23:52
comment.php	5.98 KB	-rw-r--r--	2023-12-03 20:05
continents-cities.php	20.06 KB	-rw-r--r--	2023-12-03 20:05
credits.php	5.73 KB	-rw-r--r--	2025-04-15 23:32
dashboard.php	68.08 KB	-rw-r--r--	2024-11-12 23:16
deprecated.php	40.80 KB	-rw-r--r--	2024-04-02 23:52
edit-tag-messages.php	1.44 KB	-rw-r--r--	2021-12-07 13:20
export.php	24.97 KB	-rw-r--r--	2024-07-17 02:55
file.php	95.87 KB	-rw-r--r--	2025-04-15 23:32
image-edit.php	42.85 KB	-rw-r--r--	2025-04-15 23:32
image.php	42.41 KB	-rw-r--r--	2025-04-15 23:32
import.php	6.46 KB	-rw-r--r--	2024-11-12 23:16
list-table.php	3.71 KB	-rw-r--r--	2023-12-03 20:05
media.php	116.32 KB	-rw-r--r--	2025-04-15 23:32
menu.php	9.39 KB	-rw-r--r--	2024-04-02 23:52
meta-boxes.php	64.53 KB	-rw-r--r--	2025-04-15 23:32
misc.php	44.71 KB	-rw-r--r--	2025-04-15 23:32
ms-admin-filters.php	1.27 KB	-rw-r--r--	2023-12-03 20:05
ms-deprecated.php	3.68 KB	-rw-r--r--	2023-12-03 20:05
ms.php	33.51 KB	-rw-r--r--	2025-04-15 23:32
nav-menu.php	47.89 KB	-rw-r--r--	2025-04-15 23:32
network.php	27.01 KB	-rw-r--r--	2025-04-15 23:32
noop.php	1.12 KB	-rw-r--r--	2023-12-03 20:05
options.php	4.15 KB	-rw-r--r--	2024-04-02 23:52
plugin-install.php	38.55 KB	-rw-r--r--	2024-11-12 23:16
plugin.php	91.00 KB	-r--r--r--	2024-11-12 23:16
post.php	80.28 KB	-rw-r--r--	2025-04-15 23:32
privacy-tools.php	32.68 KB	-rw-r--r--	2023-12-03 20:05
revision.php	16.18 KB	-rw-r--r--	2025-07-16 00:21
schema.php	41.86 KB	-rw-r--r--	2025-07-16 00:21
screen.php	6.23 KB	-rw-r--r--	2024-07-17 02:55
taxonomy.php	8.23 KB	-rw-r--r--	2023-12-03 20:05
template.php	96.22 KB	-rw-r--r--	2025-04-15 23:32
theme-install.php	6.83 KB	-rw-r--r--	2024-04-02 23:52
theme.php	46.62 KB	-rw-r--r--	2024-11-12 23:16
translation-install.php	10.82 KB	-rw-r--r--	2024-11-12 23:16
update-core.php	68.50 KB	-rw-r--r--	2025-09-30 23:28
update.php	33.63 KB	-rw-r--r--	2025-04-15 23:32
upgrade.php	112.09 KB	-rw-r--r--	2025-07-16 00:21
user.php	22.98 KB	-rw-r--r--	2025-04-15 23:32
widgets.php	10.66 KB	-rw-r--r--	2023-12-03 20:05

代码编辑器 :class-custom-background.php

<?php
/**
 * The custom background script.
 *
 * @package WordPress
 * @subpackage Administration
 */

/**
 * The custom background class.
 *
 * @since 3.0.0
 */
#[AllowDynamicProperties]
class Custom_Background {

/**
	 * Callback for administration header.
	 *
	 * @since 3.0.0
	 * @var callable
	 */
	public $admin_header_callback;

/**
	 * Callback for header div.
	 *
	 * @since 3.0.0
	 * @var callable
	 */
	public $admin_image_div_callback;

/**
	 * Used to trigger a success message when settings updated and set to true.
	 *
	 * @since 3.0.0
	 * @var bool
	 */
	private $updated;

/**
	 * Constructor - Registers administration header callback.
	 *
	 * @since 3.0.0
	 *
	 * @param callable $admin_header_callback    Optional. Administration header callback.
	 *                                           Default empty string.
	 * @param callable $admin_image_div_callback Optional. Custom image div output callback.
	 *                                           Default empty string.
	 */
	public function __construct( $admin_header_callback = '', $admin_image_div_callback = '' ) {
		$this->admin_header_callback    = $admin_header_callback;
		$this->admin_image_div_callback = $admin_image_div_callback;

add_action( 'admin_menu', array( $this, 'init' ) );

add_action( 'wp_ajax_custom-background-add', array( $this, 'ajax_background_add' ) );

// Unused since 3.5.0.
		add_action( 'wp_ajax_set-background-image', array( $this, 'wp_set_background_image' ) );
	}

/**
	 * Sets up the hooks for the Custom Background admin page.
	 *
	 * @since 3.0.0
	 */
	public function init() {
		$page = add_theme_page(
			_x( 'Background', 'custom background' ),
			_x( 'Background', 'custom background' ),
			'edit_theme_options',
			'custom-background',
			array( $this, 'admin_page' )
		);

if ( ! $page ) {
			return;
		}

add_action( "load-{$page}", array( $this, 'admin_load' ) );
		add_action( "load-{$page}", array( $this, 'take_action' ), 49 );
		add_action( "load-{$page}", array( $this, 'handle_upload' ), 49 );

if ( $this->admin_header_callback ) {
			add_action( "admin_head-{$page}", $this->admin_header_callback, 51 );
		}
	}

/**
	 * Sets up the enqueue for the CSS & JavaScript files.
	 *
	 * @since 3.0.0
	 */
	public function admin_load() {
		get_current_screen()->add_help_tab(
			array(
				'id'      => 'overview',
				'title'   => __( 'Overview' ),
				'content' =>
					'<p>' . __( 'You can customize the look of your site without touching any of your theme&#8217;s code by using a custom background. Your background can be an image or a color.' ) . '</p>' .
					'<p>' . __( 'To use a background image, simply upload it or choose an image that has already been uploaded to your Media Library by clicking the &#8220;Choose Image&#8221; button. You can display a single instance of your image, or tile it to fill the screen. You can have your background fixed in place, so your site content moves on top of it, or you can have it scroll with your site.' ) . '</p>' .
					'<p>' . __( 'You can also choose a background color by clicking the Select Color button and either typing in a legitimate HTML hex value, e.g. &#8220;#ff0000&#8221; for red, or by choosing a color using the color picker.' ) . '</p>' .
					'<p>' . __( 'Do not forget to click on the Save Changes button when you are finished.' ) . '</p>',
			)
		);

get_current_screen()->set_help_sidebar(
			'<p><strong>' . __( 'For more information:' ) . '</strong></p>' .
			'<p>' . __( '<a href="https://codex.wordpress.org/Appearance_Background_Screen">Documentation on Custom Background</a>' ) . '</p>' .
			'<p>' . __( '<a href="https://wordpress.org/support/forums/">Support forums</a>' ) . '</p>'
		);

wp_enqueue_media();
		wp_enqueue_script( 'custom-background' );
		wp_enqueue_style( 'wp-color-picker' );
	}

/**
	 * Executes custom background modification.
	 *
	 * @since 3.0.0
	 */
	public function take_action() {
		if ( empty( $_POST ) ) {
			return;
		}

if ( isset( $_POST['reset-background'] ) ) {
			check_admin_referer( 'custom-background-reset', '_wpnonce-custom-background-reset' );

remove_theme_mod( 'background_image' );
			remove_theme_mod( 'background_image_thumb' );

$this->updated = true;
			return;
		}

if ( isset( $_POST['remove-background'] ) ) {
			// @todo Uploaded files are not removed here.
			check_admin_referer( 'custom-background-remove', '_wpnonce-custom-background-remove' );

set_theme_mod( 'background_image', '' );
			set_theme_mod( 'background_image_thumb', '' );

$this->updated = true;
			wp_safe_redirect( $_POST['_wp_http_referer'] );
			return;
		}

if ( isset( $_POST['background-preset'] ) ) {
			check_admin_referer( 'custom-background' );

if ( in_array( $_POST['background-preset'], array( 'default', 'fill', 'fit', 'repeat', 'custom' ), true ) ) {
				$preset = $_POST['background-preset'];
			} else {
				$preset = 'default';
			}

set_theme_mod( 'background_preset', $preset );
		}

if ( isset( $_POST['background-position'] ) ) {
			check_admin_referer( 'custom-background' );

$position = explode( ' ', $_POST['background-position'] );

if ( in_array( $position[0], array( 'left', 'center', 'right' ), true ) ) {
				$position_x = $position[0];
			} else {
				$position_x = 'left';
			}

if ( in_array( $position[1], array( 'top', 'center', 'bottom' ), true ) ) {
				$position_y = $position[1];
			} else {
				$position_y = 'top';
			}

set_theme_mod( 'background_position_x', $position_x );
			set_theme_mod( 'background_position_y', $position_y );
		}

if ( isset( $_POST['background-size'] ) ) {
			check_admin_referer( 'custom-background' );

if ( in_array( $_POST['background-size'], array( 'auto', 'contain', 'cover' ), true ) ) {
				$size = $_POST['background-size'];
			} else {
				$size = 'auto';
			}

set_theme_mod( 'background_size', $size );
		}

if ( isset( $_POST['background-repeat'] ) ) {
			check_admin_referer( 'custom-background' );

$repeat = $_POST['background-repeat'];

if ( 'no-repeat' !== $repeat ) {
				$repeat = 'repeat';
			}

set_theme_mod( 'background_repeat', $repeat );
		}

if ( isset( $_POST['background-attachment'] ) ) {
			check_admin_referer( 'custom-background' );

$attachment = $_POST['background-attachment'];

if ( 'fixed' !== $attachment ) {
				$attachment = 'scroll';
			}

set_theme_mod( 'background_attachment', $attachment );
		}

if ( isset( $_POST['background-color'] ) ) {
			check_admin_referer( 'custom-background' );

$color = preg_replace( '/[^0-9a-fA-F]/', '', $_POST['background-color'] );

if ( strlen( $color ) === 6 || strlen( $color ) === 3 ) {
				set_theme_mod( 'background_color', $color );
			} else {
				set_theme_mod( 'background_color', '' );
			}
		}

$this->updated = true;
	}

/**
	 * Displays the custom background page.
	 *
	 * @since 3.0.0
	 */
	public function admin_page() {
		?>
<div class="wrap" id="custom-background">
<h1><?php _e( 'Custom Background' ); ?></h1>

<?php
		if ( current_user_can( 'customize' ) ) {
			$message = sprintf(
				/* translators: %s: URL to background image configuration in Customizer. */
				__( 'You can now manage and live-preview Custom Backgrounds in the <a href="%s">Customizer</a>.' ),
				admin_url( 'customize.php?autofocus[control]=background_image' )
			);
			wp_admin_notice(
				$message,
				array(
					'type'               => 'info',
					'additional_classes' => array( 'hide-if-no-customize' ),
				)
			);
		}

if ( ! empty( $this->updated ) ) {
			$updated_message = sprintf(
				/* translators: %s: Home URL. */
				__( 'Background updated. <a href="%s">Visit your site</a> to see how it looks.' ),
				esc_url( home_url( '/' ) )
			);
			wp_admin_notice(
				$updated_message,
				array(
					'id'                 => 'message',
					'additional_classes' => array( 'updated' ),
				)
			);
		}
		?>

<table class="form-table" role="presentation">
<tbody>
<tr>
<th scope="row"><?php _e( 'Preview' ); ?></th>
<td>
		<?php
		if ( $this->admin_image_div_callback ) {
			call_user_func( $this->admin_image_div_callback );
		} else {
			$background_styles = '';
			$bgcolor           = get_background_color();
			if ( $bgcolor ) {
				$background_styles .= 'background-color: ' . maybe_hash_hex_color( $bgcolor ) . ';';
			}

$background_image_thumb = get_background_image();
			if ( $background_image_thumb ) {
				$background_image_thumb = esc_url( set_url_scheme( get_theme_mod( 'background_image_thumb', str_replace( '%', '%%', $background_image_thumb ) ) ) );
				$background_position_x  = get_theme_mod( 'background_position_x', get_theme_support( 'custom-background', 'default-position-x' ) );
				$background_position_y  = get_theme_mod( 'background_position_y', get_theme_support( 'custom-background', 'default-position-y' ) );
				$background_size        = get_theme_mod( 'background_size', get_theme_support( 'custom-background', 'default-size' ) );
				$background_repeat      = get_theme_mod( 'background_repeat', get_theme_support( 'custom-background', 'default-repeat' ) );
				$background_attachment  = get_theme_mod( 'background_attachment', get_theme_support( 'custom-background', 'default-attachment' ) );

// Background-image URL must be single quote, see below.
				$background_styles .= " background-image: url('$background_image_thumb');"
				. " background-size: $background_size;"
				. " background-position: $background_position_x $background_position_y;"
				. " background-repeat: $background_repeat;"
				. " background-attachment: $background_attachment;";
			}
			?>
	<div id="custom-background-image" style="<?php echo $background_styles; ?>"><?php // Must be double quote, see above. ?>
			<?php if ( $background_image_thumb ) { ?>
		<img class="custom-background-image" src="<?php echo $background_image_thumb; ?>" style="visibility:hidden;" alt="" /><br />
		<img class="custom-background-image" src="<?php echo $background_image_thumb; ?>" style="visibility:hidden;" alt="" />
		<?php } ?>
	</div>
	<?php } ?>
</td>
</tr>

<?php if ( get_background_image() ) : ?>
<tr>
<th scope="row"><?php _e( 'Remove Image' ); ?></th>
<td>
<form method="post">
			<?php wp_nonce_field( 'custom-background-remove', '_wpnonce-custom-background-remove' ); ?>
			<?php submit_button( __( 'Remove Background Image' ), '', 'remove-background', false ); ?><br />
			<?php _e( 'This will remove the background image. You will not be able to restore any customizations.' ); ?>
</form>
</td>
</tr>
		<?php endif; ?>

<?php $default_image = get_theme_support( 'custom-background', 'default-image' ); ?>
		<?php if ( $default_image && get_background_image() !== $default_image ) : ?>
<tr>
<th scope="row"><?php _e( 'Restore Original Image' ); ?></th>
<td>
<form method="post">
			<?php wp_nonce_field( 'custom-background-reset', '_wpnonce-custom-background-reset' ); ?>
			<?php submit_button( __( 'Restore Original Image' ), '', 'reset-background', false ); ?><br />
			<?php _e( 'This will restore the original background image. You will not be able to restore any customizations.' ); ?>
</form>
</td>
</tr>
		<?php endif; ?>

<?php if ( current_user_can( 'upload_files' ) ) : ?>
<tr>
<th scope="row"><?php _e( 'Select Image' ); ?></th>
<td><form enctype="multipart/form-data" id="upload-form" class="wp-upload-form" method="post">
	<p>
		<label for="upload"><?php _e( 'Choose an image from your computer:' ); ?></label><br />
		<input type="file" id="upload" name="import" />
		<input type="hidden" name="action" value="save" />
			<?php wp_nonce_field( 'custom-background-upload', '_wpnonce-custom-background-upload' ); ?>
			<?php submit_button( _x( 'Upload', 'verb' ), '', 'submit', false ); ?>
	</p>
	<p>
		<label for="choose-from-library-link"><?php _e( 'Or choose an image from your media library:' ); ?></label><br />
		<button id="choose-from-library-link" class="button"
			data-choose="<?php esc_attr_e( 'Choose a Background Image' ); ?>"
			data-update="<?php esc_attr_e( 'Set as background' ); ?>"><?php _e( 'Choose Image' ); ?></button>
	</p>
	</form>
</td>
</tr>
		<?php endif; ?>
</tbody>
</table>

<?php
			$background_position = sprintf(
				'%s %s',
				get_theme_mod( 'background_position_x', get_theme_support( 'custom-background', 'default-position-x' ) ),
				get_theme_mod( 'background_position_y', get_theme_support( 'custom-background', 'default-position-y' ) )
			);

$background_position_options = array(
				array(
					'left top'   => array(
						'label' => __( 'Top Left' ),
						'icon'  => 'dashicons dashicons-arrow-left-alt',
					),
					'center top' => array(
						'label' => __( 'Top' ),
						'icon'  => 'dashicons dashicons-arrow-up-alt',
					),
					'right top'  => array(
						'label' => __( 'Top Right' ),
						'icon'  => 'dashicons dashicons-arrow-right-alt',
					),
				),
				array(
					'left center'   => array(
						'label' => __( 'Left' ),
						'icon'  => 'dashicons dashicons-arrow-left-alt',
					),
					'center center' => array(
						'label' => __( 'Center' ),
						'icon'  => 'background-position-center-icon',
					),
					'right center'  => array(
						'label' => __( 'Right' ),
						'icon'  => 'dashicons dashicons-arrow-right-alt',
					),
				),
				array(
					'left bottom'   => array(
						'label' => __( 'Bottom Left' ),
						'icon'  => 'dashicons dashicons-arrow-left-alt',
					),
					'center bottom' => array(
						'label' => __( 'Bottom' ),
						'icon'  => 'dashicons dashicons-arrow-down-alt',
					),
					'right bottom'  => array(
						'label' => __( 'Bottom Right' ),
						'icon'  => 'dashicons dashicons-arrow-right-alt',
					),
				),
			);
			?>
<tr>
<th scope="row"><?php _e( 'Image Position' ); ?></th>
<td><fieldset><legend class="screen-reader-text"><span>
			<?php
			/* translators: Hidden accessibility text. */
			_e( 'Image Position' );
			?>
</span></legend>
<div class="background-position-control">
			<?php foreach ( $background_position_options as $group ) : ?>
	<div class="button-group">
				<?php foreach ( $group as $value => $input ) : ?>
		<label>
			<input class="ui-helper-hidden-accessible" name="background-position" type="radio" value="<?php echo esc_attr( $value ); ?>"<?php checked( $value, $background_position ); ?>>
			<span class="button display-options position"><span class="<?php echo esc_attr( $input['icon'] ); ?>" aria-hidden="true"></span></span>
			<span class="screen-reader-text"><?php echo $input['label']; ?></span>
		</label>
	<?php endforeach; ?>
	</div>
<?php endforeach; ?>
</div>
</fieldset></td>
</tr>

<?php wp_nonce_field( 'custom-background' ); ?>
		<?php submit_button( null, 'primary', 'save-background-options' ); ?>
</form>

</div>
		<?php
	}

/**
	 * Handles an Image upload for the background image.
	 *
	 * @since 3.0.0
	 */
	public function handle_upload() {
		if ( empty( $_FILES ) ) {
			return;
		}

check_admin_referer( 'custom-background-upload', '_wpnonce-custom-background-upload' );

$overrides = array( 'test_form' => false );

$uploaded_file = $_FILES['import'];
		$wp_filetype   = wp_check_filetype_and_ext( $uploaded_file['tmp_name'], $uploaded_file['name'] );
		if ( ! wp_match_mime_types( 'image', $wp_filetype['type'] ) ) {
			wp_die( __( 'The uploaded file is not a valid image. Please try again.' ) );
		}

$file = wp_handle_upload( $uploaded_file, $overrides );

if ( isset( $file['error'] ) ) {
			wp_die( $file['error'] );
		}

$url      = $file['url'];
		$type     = $file['type'];
		$file     = $file['file'];
		$filename = wp_basename( $file );

// Construct the attachment array.
		$attachment = array(
			'post_title'     => $filename,
			'post_content'   => $url,
			'post_mime_type' => $type,
			'guid'           => $url,
			'context'        => 'custom-background',
		);

// Save the data.
		$id = wp_insert_attachment( $attachment, $file );

// Add the metadata.
		wp_update_attachment_metadata( $id, wp_generate_attachment_metadata( $id, $file ) );
		update_post_meta( $id, '_wp_attachment_is_custom_background', get_option( 'stylesheet' ) );

set_theme_mod( 'background_image', sanitize_url( $url ) );

$thumbnail = wp_get_attachment_image_src( $id, 'thumbnail' );
		set_theme_mod( 'background_image_thumb', sanitize_url( $thumbnail[0] ) );

/** This filter is documented in wp-admin/includes/class-custom-image-header.php */
		$file = apply_filters( 'wp_create_file_in_uploads', $file, $id ); // For replication.

$this->updated = true;
	}

/**
	 * Handles Ajax request for adding custom background context to an attachment.
	 *
	 * Triggers when the user adds a new background image from the
	 * Media Manager.
	 *
	 * @since 4.1.0
	 */
	public function ajax_background_add() {
		check_ajax_referer( 'background-add', 'nonce' );

if ( ! current_user_can( 'edit_theme_options' ) ) {
			wp_send_json_error();
		}

$attachment_id = absint( $_POST['attachment_id'] );
		if ( $attachment_id < 1 ) {
			wp_send_json_error();
		}

update_post_meta( $attachment_id, '_wp_attachment_is_custom_background', get_stylesheet() );

wp_send_json_success();
	}

/**
	 * @since 3.4.0
	 * @deprecated 3.5.0
	 *
	 * @param array $form_fields
	 * @return array $form_fields
	 */
	public function attachment_fields_to_edit( $form_fields ) {
		return $form_fields;
	}

/**
	 * @since 3.4.0
	 * @deprecated 3.5.0
	 *
	 * @param array $tabs
	 * @return array $tabs
	 */
	public function filter_upload_tabs( $tabs ) {
		return $tabs;
	}

/**
	 * @since 3.4.0
	 * @deprecated 3.5.0
	 */
	public function wp_set_background_image() {
		check_ajax_referer( 'custom-background' );

if ( ! current_user_can( 'edit_theme_options' ) || ! isset( $_POST['attachment_id'] ) ) {
			exit;
		}

$attachment_id = absint( $_POST['attachment_id'] );

$sizes = array_keys(
			/** This filter is documented in wp-admin/includes/media.php */
			apply_filters(
				'image_size_names_choose',
				array(
					'thumbnail' => __( 'Thumbnail' ),
					'medium'    => __( 'Medium' ),
					'large'     => __( 'Large' ),
					'full'      => __( 'Full Size' ),
				)
			)
		);

$size = 'thumbnail';
		if ( in_array( $_POST['size'], $sizes, true ) ) {
			$size = esc_attr( $_POST['size'] );
		}

update_post_meta( $attachment_id, '_wp_attachment_is_custom_background', get_option( 'stylesheet' ) );

$url       = wp_get_attachment_image_src( $attachment_id, $size );
		$thumbnail = wp_get_attachment_image_src( $attachment_id, 'thumbnail' );
		set_theme_mod( 'background_image', sanitize_url( $url[0] ) );
		set_theme_mod( 'background_image_thumb', sanitize_url( $thumbnail[0] ) );
		exit;
	}
}