WordPress/wp-admin/about.php

<?php
/**
 * About This Version administration panel.
 *
 * @package WordPress
 * @subpackage Administration
 */

/** WordPress Administration Bootstrap */
require_once( dirname( __FILE__ ) . '/admin.php' );

if ( ! wp_is_mobile() ) {
	wp_enqueue_style( 'wp-mediaelement' );
	wp_enqueue_script( 'wp-mediaelement' );
	wp_localize_script( 'mediaelement', '_wpmejsSettings', array(
		'pluginPath'        => includes_url( 'js/mediaelement/', 'relative' ),
		'pauseOtherPlayers' => '',
	) );
}

$video_url = 'https://videopress.com/embed/AHz0Ca46?hd=true';
$lang_code = str_replace( '_', '-', get_user_locale() );
list( $lang_code ) = explode( '-', $lang_code );
if ( 'en' !== $lang_code ) {
	$video_url = add_query_arg( 'defaultLangCode', $lang_code, $video_url );
}

$title = __( 'About' );

list( $display_version ) = explode( '-', get_bloginfo( 'version' ) );

include( ABSPATH . 'wp-admin/admin-header.php' );
?>
	<div class="wrap about-wrap">
		<h1><?php printf( __( 'Welcome to WordPress&nbsp;%s' ), $display_version ); ?></h1>

		<p class="about-text"><?php printf( __( 'Thank you for updating to the latest version! WordPress %s helps you add more content to your widgets (like media!) faster and easier.' ), $display_version ); ?></p>
		<div class="wp-badge"><?php printf( __( 'Version %s' ), $display_version ); ?></div>

		<h2 class="nav-tab-wrapper wp-clearfix">
			<a href="about.php" class="nav-tab nav-tab-active"><?php _e( 'What&#8217;s New' ); ?></a>
			<a href="credits.php" class="nav-tab"><?php _e( 'Credits' ); ?></a>
			<a href="freedoms.php" class="nav-tab"><?php _e( 'Freedoms' ); ?></a>
		</h2>

		<div class="feature-section one-col">
			<h2><?php _e( 'An Update with You in Mind' ); ?></h2>
			<p class="lead-description"><?php _e( 'WordPress 4.8 adds some great new features &mdash; gear up for a more intuitive WordPress!' ); ?></p>
			<p><?php _e( 'Though some updates are tiny (TinyMCE, that is &mdash; see what we did there?) they&#8217;ve been developed by hundreds of Core Contributors and Committers with <em>you</em> in mind.' ); ?></p>
			<p><?php _e( 'Get ready for new features you&#8217;ll welcome like an old friend: link improvements, <em>three</em> new media widgets covering images, audio, and video, an updated text widget that supports visual editing, and an upgraded news section in your dashboard which brings in nearby and upcoming WordPress events.' ); ?></p>
		</div>

		<hr />

		<h2><?php _e( 'Exciting Widget Updates' ); ?></h2>
		<div class="feature-section two-col">
			<div class="col">
				<div style="height:254px;width:480px;background:black;"></div>
				<h3><?php _e( 'Image Widget' ); ?></h3>
				<p><?php _e( 'Adding an image to a widget is now a simple task that is achievable for any WordPress user without hiring a developer. (Don&#8217;t tell them we told you that.) Simply insert your image right within the widget settings &mdash; try adding a headshot and brief bio &mdash; and see it appear, automatically.' );?></p>
			</div>
			<div class="col">
				<div style="height:254px;width:480px;background:black;"></div>
				<h3><?php _e( 'Video Widget' ); ?></h3>
				<p><?php _e( 'A welcome video is a great way to humanize the branding of your website. It creates trust and empathy in your visitors. You can now add any video from your Media Library to a sidebar on your site with the new Video Widget. So, you, too, can be liked and trusted instantly.' ); ?></p>
			</div>
		</div>

		<div class="feature-section two-col">
			<div class="col">
				<div style="height:254px;width:480px;background:black;"></div>
				<h3><?php _e( 'Audio Widget' ); ?></h3>
				<p><?php _e( 'Are you a podcaster or musician? Adding a widget with your audio file has never been easier. Upload your audio file to the media library, go to the widget settings, select your file, and you&#8217;re done. This would be a great way to add a more intimate welcome message, too!' );?></p>
			</div>
			<div class="col">
				<div style="height:254px;width:480px;background:black;"></div>
				<h3><?php _e( 'Rich Text Widget' ); ?></h3>
				<p><?php _e( 'This feature deserves a ticker-tape parade down Main Street. Rich-text editing capabilities are now native for text widgets. Simply, add a widget anywhere and format away. Create lists, add emphasis with bold or italics, and easily insert links. Have fun with your new-found formatting powers, but try to use them for good!' ); ?></p>
			</div>
		</div>

		<hr />

		<div class="feature-section two-col">
			<div class="col">
				<h3><?php _e( 'Link Boundaries' ); ?></h3>
				<p><?php _e( 'Have you ever tried updating a link or the text around a link, but you can&#8217;t seem to edit it correctly? You try to add a word after the link and your new text also ends up linked. You try to add more words to a link but they end up outside the link. Frustrating! This new feature streamlines that process. You&#8217;ll be happier. We promise.' ); ?></p>
			</div>
			<div class="col">
				<?php
				echo wp_video_shortcode( array(
					'mp4'      => 'https://s.w.org/images/core/4.7/starter-content-v1.mp4',
					'poster'   => 'https://s.w.org/images/core/4.7/starter-content.jpg?v2',
					'width'    => 1140,
					'height'   => 624,
					// 'class'    => 'wp-video-shortcode feature-video',
				) );
				?>
			</div>
		</div>

		<hr />

		<div class="feature-section two-col">
			<div class="col" style="height:254px;width:480px;background:black;"></div>
			<div class="col">
				<h3><?php _e( 'Nearby WordPress Events' ); ?></h3>

				<p><?php _e( 'Did you know that WordPress has a thriving offline community with groups meeting regularly in more than 400 cities around the world?' ); ?></p>

				<p><?php _e( 'Being part of the community can help you improve your WordPress skills and network with people you wouldn&#8217;t otherwise meet. Now you can easily find your local events just by logging in to your dashboard.' ); ?>
			</div>
		</div>

		<hr />

		<div class="changelog">
			<h2><?php
				printf(
					/* translators: %s: smiling face with smiling eyes emoji */
					__( 'Even More Developer Happiness %s' ),
					'&#x1F60A'
				);
			?></h2>

			<div class="under-the-hood three-col">
				<div class="col">
					<h3><a href="https://make.wordpress.org/core/2017/05/17/cleaner-headings-in-the-admin-screens/"><?php _e( 'More Accessible Admin Panel Headings' ); ?></a></h3>
					<p><?php _e( 'New CSS rules mean extraneous content (like &ldquo;Add New&rdquo; links) no longer need to be included in admin-area headings. This improves accessibility for those using assistive technologies.' ); ?></p>
				</div>
				<div class="col">
					<h3><a href="https://make.wordpress.org/core/2017/05/22/removal-of-core-embedding-support-for-wmv-and-wma-file-formats/"><?php _e( 'Removal of Core Support for WMV and WMA Files' ); ?></a></h3>
					<p><?php _e( 'As fewer and fewer browsers support Silverlight, file formats which require the presence of the Silverlight plugin are being removed from core support. Files will still display as a download link, but will no longer be embedded automatically.' ); ?></p>
				</div>
				<div class="col">
					<h3><a href="https://make.wordpress.org/core/2017/05/22/multisite-focused-changes-in-4-8/"><?php _e( 'Multisite Updates' ); ?></a></h3>
					<p><?php _e( 'New capabilities checks have been added to 4.8 with an eye towards removing calls to <code>is_super_admin()</code>. Additionally, new hooks, network-specific site functions, and user count controls have been added.' ); ?></p>
				</div>
			</div>

			<div class="under-the-hood three-col">
				<div class="col">
					<h3><a href="https://make.wordpress.org/core/2017/05/23/addition-of-tinymce-to-the-text-widget/"><?php _e( 'Text-Editor JavaScript API' ); ?></a></h3>
					<p><?php _e( 'With the addition of TinyMCE to the text widget in 4.8 comes a new JavaScript API for instantiating the editor after page load. This can be used to add an editor instance to any textarea and customize it with buttons and functions.' ); ?></p>
				</div>
				<div class="col">
					<h3><?php _e( 'Media Widgets API' ); ?></h3>
					<p><?php _e( 'The introduction of a new base media widget REST API schema to 4.8 opens up possibilities for more media widgets (such as galleries or playlists) in the future. The three new media widgets are powered by a shared base class that covers most of the interactions with the media modal. That class also makes it easier to create new media widgets and paves the way for more to come.' ); ?></p>
				</div>
				<div class="col">
					<h3><a href="https://make.wordpress.org/core/2017/05/16/customizer-sidebar-width-is-now-variable/"><?php _e( 'Customizer Width Variable' ); ?></a></h3>
					<p><?php _e( 'New responsive breakpoints have been added to the customizer sidebar to make it wider on high-resolution screens. Customizer controls should use percentage-based widths instead of pixels.' ); ?></p>
				</div>
			</div>
		</div>

		<hr />

		<div class="return-to-dashboard">
			<?php if ( current_user_can( 'update_core' ) && isset( $_GET['updated'] ) ) : ?>
				<a href="<?php echo esc_url( self_admin_url( 'update-core.php' ) ); ?>">
					<?php is_multisite() ? _e( 'Return to Updates' ) : _e( 'Return to Dashboard &rarr; Updates' ); ?>
				</a> |
			<?php endif; ?>
			<a href="<?php echo esc_url( self_admin_url() ); ?>"><?php is_blog_admin() ? _e( 'Go to Dashboard &rarr; Home' ) : _e( 'Go to Dashboard' ); ?></a>
		</div>

	</div>
<?php

include( ABSPATH . 'wp-admin/admin-footer.php' );

// These are strings we may use to describe maintenance/security releases, where we aim for no new strings.
return;

__( 'Maintenance Release' );
__( 'Maintenance Releases' );

__( 'Security Release' );
__( 'Security Releases' );

__( 'Maintenance and Security Release' );
__( 'Maintenance and Security Releases' );

/* translators: %s: WordPress version number */
__( '<strong>Version %s</strong> addressed one security issue.' );
/* translators: %s: WordPress version number */
__( '<strong>Version %s</strong> addressed some security issues.' );

/* translators: 1: WordPress version number, 2: plural number of bugs. */
_n_noop( '<strong>Version %1$s</strong> addressed %2$s bug.',
         '<strong>Version %1$s</strong> addressed %2$s bugs.' );

/* translators: 1: WordPress version number, 2: plural number of bugs. Singular security issue. */
_n_noop( '<strong>Version %1$s</strong> addressed a security issue and fixed %2$s bug.',
         '<strong>Version %1$s</strong> addressed a security issue and fixed %2$s bugs.' );

/* translators: 1: WordPress version number, 2: plural number of bugs. More than one security issue. */
_n_noop( '<strong>Version %1$s</strong> addressed some security issues and fixed %2$s bug.',
         '<strong>Version %1$s</strong> addressed some security issues and fixed %2$s bugs.' );

/* translators: %s: Codex URL */
__( 'For more information, see <a href="%s">the release notes</a>.' );