$paragraph_wrap     Optional. Whether to wrap the message in paragraph tags. Default true.
 * }
 * @return string The markup for an admin notice.
 */
function wp_get_admin_notice( $message, $args = array() ) {
	$defaults = array(
		'type'               => '',
		'dismissible'        => false,
		'id'                 => '',
		'additional_classes' => array(),
		'attributes'         => array(),
		'paragraph_wrap'     => true,
	);

	$args = wp_parse_args( $args, $defaults );

	/**
	 * Filters the arguments for an admin notice.
	 *
	 * @since 6.4.0
	 *
	 * @param array  $args    The arguments for the admin notice.
	 * @param string $message The message for the admin notice.
	 */
	$args       = apply_filters( 'wp_admin_notice_args', $args, $message );
	$id         = '';
	$classes    = 'notice';
	$attributes = '';

	if ( is_string( $args['id'] ) ) {
		$trimmed_id = trim( $args['id'] );

		if ( '' !== $trimmed_id ) {
			$id = 'id="' . $trimmed_id . '" ';
		}
	}

	if ( is_string( $args['type'] ) ) {
		$type = trim( $args['type'] );

		if ( str_contains( $type, ' ' ) ) {
			_doing_it_wrong(
				__FUNCTION__,
				sprintf(
					/* translators: %s: The "type" key. */
					__( 'The %s key must be a string without spaces.' ),
					'<code>type</code>'
				),
				'6.4.0'
			);
		}

		if ( '' !== $type ) {
			$classes .= ' notice-' . $type;
		}
	}

	if ( true === $args['dismissible'] ) {
		$classes .= ' is-dismissible';
	}

	if ( is_array( $args['additional_classes'] ) && ! empty( $args['additional_classes'] ) ) {
		$classes .= ' ' . implode( ' ', $args['additional_classes'] );
	}

	if ( is_array( $args['attributes'] ) && ! empty( $args['attributes'] ) ) {
		$attributes = '';
		foreach ( $args['attributes'] as $attr => $val ) {
			if ( is_bool( $val ) ) {
				$attributes .= $val ? ' ' . $attr : '';
			} elseif ( is_int( $attr ) ) {
				$attributes .= ' ' . esc_attr( trim( $val ) );
			} elseif ( $val ) {
				$attributes .= ' ' . $attr . '="' . esc_attr( trim( $val ) ) . '"';
			}
		}
	}

	if ( false !== $args['paragraph_wrap'] ) {
		$message = "<p>$message</p>";
	}

	$markup = sprintf( '<div %1$sclass="%2$s"%3$s>%4$s</div>', $id, $classes, $attributes, $message );

	/**
	 * Filters the markup for an admin notice.
	 *
	 * @since 6.4.0
	 *
	 * @param string $markup  The HTML markup for the admin notice.
	 * @param string $message The message for the admin notice.
	 * @param array  $args    The arguments for the admin notice.
	 */
	return apply_filters( 'wp_admin_notice_markup', $markup, $message, $args );
}

/**
 * Outputs an admin notice.
 *
 * @since 6.4.0
 *
 * @param string $message The message to output.
 * @param array  $args {
 *     Optional. An array of arguments for the admin notice. Default empty array.
 *
 *     @type string   $type               Optional. The type of admin notice.
 *                                        For example, 'error', 'success', 'warning', 'info'.
 *                                        Default empty string.
 *     @type bool     $dismissible        Optional. Whether the admin notice is dismissible. Default false.
 *     @type string   $id                 Optional. The value of the admin notice's ID attribute. Default empty string.
 *     @type string[] $additional_classes Optional. A string array of class names. Default empty array.
 *     @type string[] $attributes         Optional. Additional attributes for the notice div. Default empty array.
 *     @type bool     $paragraph_wrap     Optional. Whether to wrap the message in paragraph tags. Default true.
 * }
 */
function wp_admin_notice( $message, $args = array() ) {
	/**
	 * Fires before an admin notice is output.
	 *
	 * @since 6.4.0
	 *
	 * @param string $message The message for the admin notice.
	 * @param array  $args    The arguments for the admin notice.
	 */
	do_action( 'wp_admin_notice', $message, $args );

	echo wp_kses_post( wp_get_admin_notice( $message, $args ) );
}
<br />
<b>Fatal error</b>:  Uncaught Error: Call to undefined function is_blog_installed() in /home/healths/public_html/wp-includes/load.php:905
Stack trace:
#0 /home/healths/public_html/wp-settings.php(173): wp_not_installed()
#1 /home/healths/public_html/wp-config.php(99): require_once('/home/healths/p...')
#2 /home/healths/public_html/wp-load.php(50): require_once('/home/healths/p...')
#3 /home/healths/public_html/wp-blog-header.php(13): require_once('/home/healths/p...')
#4 /home/healths/public_html/index.php(17): require('/home/healths/p...')
#5 {main}
  thrown in <b>/home/healths/public_html/wp-includes/load.php</b> on line <b>905</b><br />
<br />
<b>Fatal error</b>:  Uncaught Error: Call to undefined function get_option() in /home/healths/public_html/wp-includes/l10n.php:63
Stack trace:
#0 /home/healths/public_html/wp-includes/l10n.php(165): get_locale()
#1 /home/healths/public_html/wp-includes/l10n.php(947): determine_locale()
#2 /home/healths/public_html/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain()
#3 [internal function]: WP_Fatal_Error_Handler-&gt;handle()
#4 {main}
  thrown in <b>/home/healths/public_html/wp-includes/l10n.php</b> on line <b>63</b><br />