<form method="POST">
    <h3>Editing: link-manager.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php
/**
 * Link Management Administration Screen.
 *
 * @package WordPress
 * @subpackage Administration
 */

/** Load WordPress Administration Bootstrap */
require_once __DIR__ . '/admin.php';
if ( ! current_user_can( 'manage_links' ) ) {
	wp_die( __( 'Sorry, you are not allowed to edit the links for this site.' ) );
}

$wp_list_table = _get_list_table( 'WP_Links_List_Table' );

// Handle bulk deletes.
$doaction = $wp_list_table-&gt;current_action();

if ( $doaction &amp;&amp; isset( $_REQUEST['linkcheck'] ) ) {
	check_admin_referer( 'bulk-bookmarks' );

	$redirect_to = admin_url( 'link-manager.php' );
	$bulklinks   = (array) $_REQUEST['linkcheck'];

	if ( 'delete' === $doaction ) {
		foreach ( $bulklinks as $link_id ) {
			$link_id = (int) $link_id;

			wp_delete_link( $link_id );
		}

		$redirect_to = add_query_arg( 'deleted', count( $bulklinks ), $redirect_to );
	} else {
		$screen = get_current_screen()-&gt;id;

		/** This action is documented in wp-admin/edit.php */
		$redirect_to = apply_filters( &quot;handle_bulk_actions-{$screen}&quot;, $redirect_to, $doaction, $bulklinks ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores
	}
	wp_redirect( $redirect_to );
	exit;
} elseif ( ! empty( $_GET['_wp_http_referer'] ) ) {
	wp_redirect( remove_query_arg( array( '_wp_http_referer', '_wpnonce' ), wp_unslash( $_SERVER['REQUEST_URI'] ) ) );
	exit;
}

$wp_list_table-&gt;prepare_items();

// Used in the HTML title tag.
$title       = __( 'Links' );
$this_file   = 'link-manager.php';
$parent_file = $this_file;

get_current_screen()-&gt;add_help_tab(
	array(
		'id'      =&gt; 'overview',
		'title'   =&gt; __( 'Overview' ),
		'content' =&gt;
			'&lt;p&gt;' . sprintf(
				/* translators: %s: URL to Widgets screen. */
				__( 'You can add links here to be displayed on your site, usually using &lt;a href=&quot;%s&quot;&gt;Widgets&lt;/a&gt;. By default, links to several sites in the WordPress community are included as examples.' ),
				'widgets.php'
			) . '&lt;/p&gt;' .
			'&lt;p&gt;' . __( 'Links may be separated into Link Categories; these are different than the categories used on your posts.' ) . '&lt;/p&gt;' .
			'&lt;p&gt;' . __( 'You can customize the display of this screen using the Screen Options tab and/or the dropdown filters above the links table.' ) . '&lt;/p&gt;',
	)
);
get_current_screen()-&gt;add_help_tab(
	array(
		'id'      =&gt; 'deleting-links',
		'title'   =&gt; __( 'Deleting Links' ),
		'content' =&gt;
			'&lt;p&gt;' . __( 'If you delete a link, it will be removed permanently, as Links do not have a Trash function yet.' ) . '&lt;/p&gt;',
	)
);

get_current_screen()-&gt;set_help_sidebar(
	'&lt;p&gt;&lt;strong&gt;' . __( 'For more information:' ) . '&lt;/strong&gt;&lt;/p&gt;' .
	'&lt;p&gt;' . __( '&lt;a href=&quot;https://codex.wordpress.org/Links_Screen&quot;&gt;Documentation on Managing Links&lt;/a&gt;' ) . '&lt;/p&gt;' .
	'&lt;p&gt;' . __( '&lt;a href=&quot;https://wordpress.org/support/forums/&quot;&gt;Support forums&lt;/a&gt;' ) . '&lt;/p&gt;'
);

get_current_screen()-&gt;set_screen_reader_content(
	array(
		'heading_list' =&gt; __( 'Links list' ),
	)
);

require_once ABSPATH . 'wp-admin/admin-header.php';

if ( ! current_user_can( 'manage_links' ) ) {
	wp_die( __( 'Sorry, you are not allowed to edit the links for this site.' ) );
}

?&gt;

&lt;div class=&quot;wrap nosubsub&quot;&gt;
&lt;h1 class=&quot;wp-heading-inline&quot;&gt;
&lt;?php
echo esc_html( $title );
?&gt;
&lt;/h1&gt;

&lt;a href=&quot;link-add.php&quot; class=&quot;page-title-action&quot;&gt;&lt;?php echo esc_html__( 'Add Link' ); ?&gt;&lt;/a&gt;

&lt;?php
if ( isset( $_REQUEST['s'] ) &amp;&amp; strlen( $_REQUEST['s'] ) ) {
	echo '&lt;span class=&quot;subtitle&quot;&gt;';
	printf(
		/* translators: %s: Search query. */
		__( 'Search results for: %s' ),
		'&lt;strong&gt;' . esc_html( wp_unslash( $_REQUEST['s'] ) ) . '&lt;/strong&gt;'
	);
	echo '&lt;/span&gt;';
}
?&gt;

&lt;hr class=&quot;wp-header-end&quot;&gt;

&lt;?php
if ( isset( $_REQUEST['deleted'] ) ) {
	$deleted = (int) $_REQUEST['deleted'];
	/* translators: %s: Number of links. */
	$deleted_message = sprintf( _n( '%s link deleted.', '%s links deleted.', $deleted ), $deleted );
	wp_admin_notice(
		$deleted_message,
		array(
			'id'                 =&gt; 'message',
			'additional_classes' =&gt; array( 'updated' ),
			'dismissible'        =&gt; true,
		)
	);
	$_SERVER['REQUEST_URI'] = remove_query_arg( array( 'deleted' ), $_SERVER['REQUEST_URI'] );
}
?&gt;

&lt;form id=&quot;posts-filter&quot; method=&quot;get&quot;&gt;

&lt;?php $wp_list_table-&gt;search_box( __( 'Search Links' ), 'link' ); ?&gt;

&lt;?php $wp_list_table-&gt;display(); ?&gt;

&lt;div id=&quot;ajax-response&quot;&gt;&lt;/div&gt;
&lt;/form&gt;

&lt;/div&gt;

&lt;?php
require_once ABSPATH . 'wp-admin/admin-footer.php';
</textarea><br>
    <input type="submit" value="Save">
</form>