Changes:

- added missing type-hints
- first access level, then static
- reformatted code following code-style

src/Util/Mimetype.php

@@ -27,6 +27,7 @@ class Mimetype
 	 * Return mimetype based on file extension
 	 *
 	 * @param string $filename filename
+	 *
 	 * @return mixed array or string
 	 */
 	public static function getContentType(string $filename)

src/Util/Network.php

@@ -50,6 +50,7 @@ class Network
 	 * and check DNS to see if it's real (or check if is a valid IP address)
 	 *
 	 * @param string $url The URL to be validated
+	 *
 	 * @return string|boolean The actual working URL, false else
 	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 	 */
@@ -259,6 +260,7 @@ class Network
 	 *
 	 * @param string $domain
 	 * @param array  $domain_list
+	 *
 	 * @return boolean
 	 */
 	public static function isDomainAllowed(string $domain, array $domain_list): bool
@@ -297,6 +299,7 @@ class Network
 	 * Remove Google Analytics and other tracking platforms params from URL
 	 *
 	 * @param string $url Any user-submitted URL that may contain tracking params
+	 *
 	 * @return string The same URL stripped of tracking parameters
 	 */
 	public static function stripTrackingQueryParams(string $url): string
@@ -350,9 +353,10 @@ class Network
 	 *
 	 * @param string $url
 	 * @param string $basepath
+	 *
 	 * @return string url
 	 */
-	public static function addBasePath(string $url, string $basepath)
+	public static function addBasePath(string $url, string $basepath): string
 	{
 		if (!empty(parse_url($url, PHP_URL_SCHEME)) || empty(parse_url($basepath, PHP_URL_SCHEME)) || empty($url) || empty(parse_url($url))) {
 			return $url;
@@ -372,6 +376,7 @@ class Network
 	 *
 	 * @param string $url1
 	 * @param string $url2
+	 *
 	 * @return string The matching part or empty string on error
 	 */
 	public static function getUrlMatch(string $url1, string $url2): string
@@ -459,6 +464,7 @@ class Network
 	 * Glue url parts together
 	 *
 	 * @param array $parsed URL parts
+	 *
 	 * @return string|null The glued URL or null on error
 	 * @deprecated since version 2021.12, use GuzzleHttp\Psr7\Uri::fromParts($parts) instead
 	 */
@@ -490,6 +496,7 @@ class Network
 	 * Convert an URI to an IDN compatible URI
 	 *
 	 * @param string $uri
+	 *
 	 * @return string
 	 */
 	public static function convertToIdn(string $uri): string
@@ -514,6 +521,7 @@ class Network
 	 * Switch the scheme of an url between http and https
 	 *
 	 * @param string $url
+	 *
 	 * @return string Switched URL
 	 */
 	public static function switchScheme(string $url): string
@@ -537,6 +545,7 @@ class Network
 	 *
 	 * @param string $path
 	 * @param array  $additionalParams Associative array of parameters
+	 *
 	 * @return string
 	 */
 	public static function appendQueryParam(string $path, array $additionalParams): string
@@ -563,6 +572,7 @@ class Network
 	 *
 	 * @param string $etag          The page etag
 	 * @param string $last_modified The page last modification UTC date
+	 *
 	 * @return void
 	 * @throws \Exception
 	 */
@@ -601,6 +611,7 @@ class Network
 	 * Check if the given URL is a local link
 	 *
 	 * @param string $url
+	 *
 	 * @return bool
 	 */
 	public static function isLocalLink(string $url): bool

src/Util/ParseUrl.php

@@ -187,7 +187,7 @@ class ParseUrl
 	 * </body>
 	 * @endverbatim
 	 */
-	public static function getSiteinfo(string $url, bool $do_oembed = true, int $count = 1)
+	public static function getSiteinfo(string $url, bool $do_oembed = true, int $count = 1): array
 	{
 		if (empty($url)) {
 			return [
@@ -645,6 +645,7 @@ class ParseUrl
 	 * Convert tags from CSV to an array
 	 *
 	 * @param string $string Tags
+	 *
 	 * @return array with formatted Hashtags
 	 */
 	public static function convertTagsToArray(string $string): array
@@ -666,6 +667,7 @@ class ParseUrl
 	 *
 	 * @param string $tag The pure tag name
 	 * @param int    $k   Counter for internal use
+	 *
 	 * @return void
 	 */
 	private static function arrAddHashes(string &$tag, int $k)
@@ -729,6 +731,7 @@ class ParseUrl
 	 *
 	 * @param array $siteinfo
 	 * @param array $jsonld
+	 *
 	 * @return array siteinfo
 	 */
 	private static function parseParts(array $siteinfo, array $jsonld): array
@@ -774,6 +777,7 @@ class ParseUrl
 	 *
 	 * @param array $siteinfo
 	 * @param array $jsonld
+	 *
 	 * @return array siteinfo
 	 */
 	private static function parseJsonLd(array $siteinfo, array $jsonld): array
@@ -867,6 +871,7 @@ class ParseUrl
 	 *
 	 * @param array $siteinfo
 	 * @param array $jsonld
+	 *
 	 * @return array siteinfo
 	 */
 	private static function parseJsonLdAuthor(array $siteinfo, array $jsonld): array
@@ -951,6 +956,7 @@ class ParseUrl
 	 *
 	 * @param array $siteinfo
 	 * @param array $jsonld
+	 *
 	 * @return array siteinfo
 	 */
 	private static function parseJsonLdArticle(array $siteinfo, array $jsonld): array
@@ -1021,6 +1027,7 @@ class ParseUrl
 	 *
 	 * @param array $siteinfo
 	 * @param array $jsonld
+	 *
 	 * @return array siteinfo
 	 */
 	private static function parseJsonLdWebPage(array $siteinfo, array $jsonld): array
@@ -1060,6 +1067,7 @@ class ParseUrl
 	 *
 	 * @param array $siteinfo
 	 * @param array $jsonld
+	 *
 	 * @return array siteinfo
 	 */
 	private static function parseJsonLdWebSite(array $siteinfo, array $jsonld): array
@@ -1098,6 +1106,7 @@ class ParseUrl
 	 *
 	 * @param array $siteinfo
 	 * @param array $jsonld
+	 *
 	 * @return array siteinfo
 	 */
 	private static function parseJsonLdWebOrganization(array $siteinfo, array $jsonld): array
@@ -1144,6 +1153,7 @@ class ParseUrl
 	 *
 	 * @param array $siteinfo
 	 * @param array $jsonld
+	 *
 	 * @return array siteinfo
 	 */
 	private static function parseJsonLdWebPerson(array $siteinfo, array $jsonld): array
@@ -1189,6 +1199,7 @@ class ParseUrl
 	 *
 	 * @param array $siteinfo
 	 * @param array $jsonld
+	 *
 	 * @return array siteinfo
 	 */
 	private static function parseJsonLdMediaObject(array $siteinfo, array $jsonld, string $name): array

src/Util/PidFile.php

@@ -33,7 +33,8 @@ class PidFile
 	 *
 	 * @return boolean|string PID or "false" if not existent
 	 */
-	static private function pidFromFile($file) {
+	private static function pidFromFile(string $file)
+	{
 		if (!file_exists($file)) {
 			return false;
 		}
@@ -48,7 +49,8 @@ class PidFile
 	 *
 	 * @return boolean Is it running?
 	 */
-	static public function isRunningProcess($file) {
+	public static function isRunningProcess(string $file): bool
+	{
 		$pid = self::pidFromFile($file);
 
 		if (!$pid) {
@@ -72,7 +74,8 @@ class PidFile
 	 *
 	 * @return boolean Was it killed successfully?
 	 */
-	static public function killProcess($file) {
+	public static function killProcess(string $file): bool
+	{
 		$pid = self::pidFromFile($file);
 
 		// We don't have a process id? then we quit
@@ -97,7 +100,7 @@ class PidFile
 	 *
 	 * @return boolean|string PID or "false" if not created
 	 */
-	static public function create(string $file)
+	public static function create(string $file)
 	{
 		$pid = self::pidFromFile($file);
 
@@ -120,7 +123,7 @@ class PidFile
 	 *
 	 * @return boolean Is it running?
 	 */
-	static public function delete(string $file): bool
+	public static function delete(string $file): bool
 	{
 		return @unlink($file);
 	}

src/Util/Profiler.php

@@ -61,7 +61,7 @@ class Profiler implements ContainerInterface
 	 *
 	 * @return bool
 	 */
-	public function isRendertime()
+	public function isRendertime(): bool
 	{
 		return $this->rendertime;
 	}
@@ -91,6 +91,7 @@ class Profiler implements ContainerInterface
 	 * Start a profiler recording
 	 *
 	 * @param string $value
+	 *
 	 * @return void
 	 */
 	public function startRecording(string $value)
@@ -106,6 +107,7 @@ class Profiler implements ContainerInterface
 	 * Stop a profiler recording
 	 *
 	 * @param string $callstack
+	 *
 	 * @return void
 	 */
 	public function stopRecording(string $callstack = '')
@@ -147,8 +149,10 @@ class Profiler implements ContainerInterface
 	 * @param int    $timestamp the Timestamp
 	 * @param string $value     A value to profile
 	 * @param string $callstack A callstack string, generated if absent
+	 *
+	 * @return void
 	 */
-	public function saveTimestamp($timestamp, $value, $callstack = '')
+	public function saveTimestamp(int $timestamp, string $value, string $callstack = '')
 	{
 		if (!$this->enabled) {
 			return;
@@ -176,6 +180,8 @@ class Profiler implements ContainerInterface
 
 	/**
 	 * Resets the performance and callstack profiling
+	 *
+	 * @return void
 	 */
 	public function reset()
 	{
@@ -185,6 +191,8 @@ class Profiler implements ContainerInterface
 
 	/**
 	 * Resets the performance profiling data
+	 *
+	 * @return void
 	 */
 	public function resetPerformance()
 	{
@@ -209,6 +217,8 @@ class Profiler implements ContainerInterface
 
 	/**
 	 * Resets the callstack profiling data
+	 *
+	 * @return void
 	 */
 	public function resetCallstack()
 	{
@@ -229,7 +239,7 @@ class Profiler implements ContainerInterface
 	 *
 	 * @return string the rendertime
 	 */
-	public function getRendertimeString(float $limit = 0)
+	public function getRendertimeString(float $limit = 0): string
 	{
 		$output = '';
 
@@ -237,58 +247,62 @@ class Profiler implements ContainerInterface
 			return $output;
 		}
 
-		if (isset($this->callstack["database"])) {
+		if (isset($this->callstack['database'])) {
 			$output .= "\nDatabase Read:\n";
-			foreach ($this->callstack["database"] as $func => $time) {
+			foreach ($this->callstack['database'] as $func => $time) {
 				$time = round($time, 3);
 				if ($time > $limit) {
-					$output .= $func . ": " . $time . "\n";
+					$output .= $func . ': ' . $time . "\n";
-				}
-			}
-		}
-		if (isset($this->callstack["database_write"])) {
-			$output .= "\nDatabase Write:\n";
-			foreach ($this->callstack["database_write"] as $func => $time) {
-				$time = round($time, 3);
-				if ($time > $limit) {
-					$output .= $func . ": " . $time . "\n";
-				}
-			}
-		}
-		if (isset($this->callstack["cache"])) {
-			$output .= "\nCache Read:\n";
-			foreach ($this->callstack["cache"] as $func => $time) {
-				$time = round($time, 3);
-				if ($time > $limit) {
-					$output .= $func . ": " . $time . "\n";
-				}
-			}
-		}
-		if (isset($this->callstack["cache_write"])) {
-			$output .= "\nCache Write:\n";
-			foreach ($this->callstack["cache_write"] as $func => $time) {
-				$time = round($time, 3);
-				if ($time > $limit) {
-					$output .= $func . ": " . $time . "\n";
-				}
-			}
-		}
-		if (isset($this->callstack["network"])) {
-			$output .= "\nNetwork:\n";
-			foreach ($this->callstack["network"] as $func => $time) {
-				$time = round($time, 3);
-				if ($time > $limit) {
-					$output .= $func . ": " . $time . "\n";
 				}
 			}
 		}
 
-		if (isset($this->callstack["rendering"])) {
+		if (isset($this->callstack['database_write'])) {
-			$output .= "\nRendering:\n";
+			$output .= "\nDatabase Write:\n";
-			foreach ($this->callstack["rendering"] as $func => $time) {
+			foreach ($this->callstack['database_write'] as $func => $time) {
 				$time = round($time, 3);
 				if ($time > $limit) {
-					$output .= $func . ": " . $time . "\n";
+					$output .= $func . ': ' . $time . "\n";
+				}
+			}
+		}
+
+		if (isset($this->callstack['cache'])) {
+			$output .= "\nCache Read:\n";
+			foreach ($this->callstack['cache'] as $func => $time) {
+				$time = round($time, 3);
+				if ($time > $limit) {
+					$output .= $func . ': ' . $time . "\n";
+				}
+			}
+		}
+
+		if (isset($this->callstack['cache_write'])) {
+			$output .= "\nCache Write:\n";
+			foreach ($this->callstack['cache_write'] as $func => $time) {
+				$time = round($time, 3);
+				if ($time > $limit) {
+					$output .= $func . ': ' . $time . "\n";
+				}
+			}
+		}
+
+		if (isset($this->callstack['network'])) {
+			$output .= "\nNetwork:\n";
+			foreach ($this->callstack['network'] as $func => $time) {
+				$time = round($time, 3);
+				if ($time > $limit) {
+					$output .= $func . ': ' . $time . "\n";
+				}
+			}
+		}
+
+		if (isset($this->callstack['rendering'])) {
+			$output .= "\nRendering:\n";
+			foreach ($this->callstack['rendering'] as $func => $time) {
+				$time = round($time, 3);
+				if ($time > $limit) {
+					$output .= $func . ': ' . $time . "\n";
 				}
 			}
 		}
@@ -301,8 +315,10 @@ class Profiler implements ContainerInterface
 	 *
 	 * @param LoggerInterface $logger  The logger to save the current log
 	 * @param string          $message Additional message for the log
+	 *
+	 * @return void
 	 */
-	public function saveLog(LoggerInterface $logger, $message = '')
+	public function saveLog(LoggerInterface $logger, string $message = '')
 	{
 		$duration = microtime(true) - $this->get('start');
 		$logger->info(
@@ -338,7 +354,7 @@ class Profiler implements ContainerInterface
 	 *
 	 * @return int Entry.
 	 */
-	public function get($id)
+	public function get(string $id): int
 	{
 		if (!$this->has($id)) {
 			return 0;
@@ -347,7 +363,7 @@ class Profiler implements ContainerInterface
 		}
 	}
 
-	public function set($timestamp, $id)
+	public function set($timestamp, string $id)
 	{
 		$this->performance[$id] = $timestamp;
 	}
@@ -363,7 +379,7 @@ class Profiler implements ContainerInterface
 	 *
 	 * @return bool
 	 */
-	public function has($id)
+	public function has(string $id): bool
 	{
 		return isset($this->performance[$id]);
 	}

src/Util/Proxy.php

@@ -132,6 +132,7 @@ class Proxy
 	 * proxy storage directory.
 	 *
 	 * @param string $html Un-proxified HTML code
+	 *
 	 * @return string Proxified HTML code
 	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 	 */
@@ -146,6 +147,7 @@ class Proxy
 	 * Checks if the URL is a local URL.
 	 *
 	 * @param string $url
+	 *
 	 * @return boolean
 	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 	 */
@@ -166,6 +168,7 @@ class Proxy
 	 * Return the array of query string parameters from a URL
 	 *
 	 * @param string $url URL to parse
+	 *
 	 * @return array Associative array of query string parameters
 	 */
 	private static function parseQuery(string $url): array
@@ -182,6 +185,7 @@ class Proxy
 	 * Call-back method to replace the UR
 	 *
 	 * @param array $matches Matches from preg_replace_callback()
+	 *
 	 * @return string Proxified HTML image tag
 	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 	 */

src/Util/Strings.php

@@ -33,6 +33,7 @@ class Strings
 	 * Generates a pseudo-random string of hexadecimal characters
 	 *
 	 * @param int $size Size of string (default: 64)
+	 *
 	 * @return string Pseudo-random string
 	 * @throws \Exception
 	 */
@@ -159,6 +160,7 @@ class Strings
 	 *
 	 * @param string $network Network name of the contact (e.g. dfrn, rss and so on)
 	 * @param string $url	  The contact url
+	 *
 	 * @return string Formatted network name
 	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 	 */
@@ -341,7 +343,8 @@ class Strings
 	 * Check if the trimmed provided string is starting with one of the provided characters
 	 *
 	 * @param string $string
-	 * @param array	 $chars
+	 * @param array $chars
+	 *
 	 * @return bool
 	 */
 	public static function startsWithChars(string $string, array $chars): bool
@@ -372,13 +375,12 @@ class Strings
 	 * @see http://maettig.com/code/php/php-performance-benchmarks.php#endswith
 	 * @param string $string
 	 * @param string $end
+	 *
 	 * @return bool
 	 */
-	public static function endsWith(string $string, string $end): string
+	public static function endsWith(string $string, string $end): bool
 	{
-		$return = substr_compare($string, $end, -strlen($end)) === 0;
+		return (substr_compare($string, $end, -strlen($end)) === 0);
-
-		return $return;
 	}
 
 	/**
@@ -413,8 +415,9 @@ class Strings
 	/**
 	 * Ensures a single path item doesn't contain any path-traversing characters
 	 *
-	 * @see https://stackoverflow.com/a/46097713
 	 * @param string $pathItem
+	 *
+	 * @see https://stackoverflow.com/a/46097713
 	 * @return string
 	 */
 	public static function sanitizeFilePathItem(string $pathItem): string
@@ -436,6 +439,7 @@ class Strings
 	 * @param string   $replacement
 	 * @param int      $start
 	 * @param int|null $length
+	 *
 	 * @return string
 	 * @see substr_replace()
 	 */
@@ -474,6 +478,7 @@ class Strings
 	 * @param string   $text
 	 * @param string   $regex
 	 * @param callable $callback
+	 *
 	 * @return string
 	 */
 	public static function performWithEscapedBlocks(string $text, string $regex, callable $callback): string

src/Util/Temporal.php

@@ -37,9 +37,10 @@ class Temporal
 	 *
 	 * @param string $a
 	 * @param string $b
+	 *
 	 * @return int
 	 */
-	private static function timezoneCompareCallback($a, $b)
+	private static function timezoneCompareCallback(string $a, string $b): int
 	{
 		if (strstr($a, '/') && strstr($b, '/')) {
 			if (DI::l10n()->t($a) == DI::l10n()->t($b)) {
@@ -63,9 +64,10 @@ class Temporal
 	 * Emit a timezone selector grouped (primarily) by continent
 	 *
 	 * @param string $current Timezone
+	 *
 	 * @return string Parsed HTML output
 	 */
-	public static function getTimezoneSelect($current = 'America/Los_Angeles')
+	public static function getTimezoneSelect(string $current = 'America/Los_Angeles'): string
 	{
 		$timezone_identifiers = DateTimeZone::listIdentifiers();
 
@@ -120,7 +122,7 @@ class Temporal
 	 * @return string Parsed HTML
 	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 	 */
-	public static function getTimezoneField($name = 'timezone', $label = '', $current = 'America/Los_Angeles', $help = '')
+	public static function getTimezoneField(string $name = 'timezone', string $label = '', string $current = 'America/Los_Angeles', string $help = ''): string
 	{
 		$options = self::getTimezoneSelect($current);
 		$options = str_replace('<select id="timezone_select" name="timezone">', '', $options);
@@ -137,10 +139,11 @@ class Temporal
 	 *
 	 * @param string $dob Date of Birth
 	 * @param string $timezone
+	 *
 	 * @return string Formatted HTML
 	 * @throws \Exception
 	 */
-	public static function getDateofBirthField(string $dob, string $timezone = 'UTC')
+	public static function getDateofBirthField(string $dob, string $timezone = 'UTC'): string
 	{
 		list($year, $month, $day) = sscanf($dob, '%4d-%2d-%2d');
 
@@ -182,7 +185,7 @@ class Temporal
 	 * @return string Parsed HTML output.
 	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 	 */
-	public static function getDateField($min, $max, $default, $id = 'datepicker')
+	public static function getDateField(DateTime $min, DateTime $max, DateTime $default, string $id = 'datepicker'): string
 	{
 		return self::getDateTimeField($min, $max, $default, '', $id, true, false, '', '');
 	}
@@ -197,7 +200,7 @@ class Temporal
 	 * @return string Parsed HTML output.
 	 * @throws \Exception
 	 */
-	public static function getTimeField($h, $m, $id = 'timepicker')
+	public static function getTimeField(string $h, string $m, string $id = 'timepicker'): string
 	{
 		return self::getDateTimeField(new DateTime(), new DateTime(), new DateTime("$h:$m"), '', $id, false, true);
 	}
@@ -227,12 +230,12 @@ class Temporal
 		DateTime $maxDate,
 		DateTime $defaultDate = null,
 		$label,
-		$id       = 'datetimepicker',
+		string $id       = 'datetimepicker',
-		$pickdate = true,
+		bool $pickdate = true,
-		$picktime = true,
+		bool $picktime = true,
-		$minfrom  = '',
+		string $minfrom  = '',
-		$maxfrom  = '',
+		string $maxfrom  = '',
-		$required = false)
+		bool $required = false): string
 	{
 		// First day of the week (0 = Sunday)
 		$firstDay = DI::pConfig()->get(local_user(), 'system', 'first_day_of_week', 0);
@@ -241,8 +244,8 @@ class Temporal
 
 		// Check if the detected language is supported by the picker
 		if (!in_array($lang,
-				["ar", "ro", "id", "bg", "fa", "ru", "uk", "en", "el", "de", "nl", "tr", "fr", "es", "th", "pl", "pt", "ch", "se", "kr",
+				['ar', 'ro', 'id', 'bg', 'fa', 'ru', 'uk', 'en', 'el', 'de', 'nl', 'tr', 'fr', 'es', 'th', 'pl', 'pt', 'ch', 'se', 'kr',
-				"it", "da", "no", "ja", "vi", "sl", "cs", "hu"])) {
+				'it', 'da', 'no', 'ja', 'vi', 'sl', 'cs', 'hu'])) {
 			$lang = 'en';
 		}
 
@@ -308,7 +311,7 @@ class Temporal
 	 *
 	 * @return string with relative date
 	 */
-	public static function getRelativeDate($posted_date, $format = null)
+	public static function getRelativeDate(string $posted_date, string $format = null): string
 	{
 		$localtime = $posted_date . ' UTC';
 
@@ -330,13 +333,14 @@ class Temporal
 			$isfuture = true;
 		}
 
-		$a = [12 * 30 * 24 * 60 * 60 => [DI::l10n()->t('year'), DI::l10n()->t('years')],
+		$a = [
+			12 * 30 * 24 * 60 * 60 => [DI::l10n()->t('year'), DI::l10n()->t('years')],
 			30 * 24 * 60 * 60 => [DI::l10n()->t('month'), DI::l10n()->t('months')],
 			7 * 24 * 60 * 60 => [DI::l10n()->t('week'), DI::l10n()->t('weeks')],
 			24 * 60 * 60 => [DI::l10n()->t('day'), DI::l10n()->t('days')],
 			60 * 60 => [DI::l10n()->t('hour'), DI::l10n()->t('hours')],
 			60 => [DI::l10n()->t('minute'), DI::l10n()->t('minutes')],
-			1 => [DI::l10n()->t('second'), DI::l10n()->t('seconds')]
+			1 => [DI::l10n()->t('second'), DI::l10n()->t('seconds')],
 		];
 
 		foreach ($a as $secs => $str) {
@@ -395,7 +399,7 @@ class Temporal
 	 *
 	 * @return int Number of days in the given month
 	 */
-	public static function getDaysInMonth($y, $m)
+	public static function getDaysInMonth(int $y, int $m): int
 	{
 		return date('t', mktime(0, 0, 0, $m, 1, $y));
 	}
@@ -411,7 +415,7 @@ class Temporal
 	 * @return string day 0 = Sunday through 6 = Saturday
 	 * @throws \Exception
 	 */
-	private static function getFirstDayInMonth($y, $m)
+	private static function getFirstDayInMonth(int $y, int $m): string
 	{
 		$d = sprintf('%04d-%02d-01 00:00', intval($y), intval($m));
 
@@ -436,7 +440,7 @@ class Temporal
 	 * @throws \Exception
 	 * @todo  Provide (prev, next) links, define class variations for different size calendars
 	 */
-	public static function getCalendarTable($y = 0, $m = 0, $links = null, $class = '')
+	public static function getCalendarTable(int $y = 0, int $m = 0, array $links = null, string $class = ''): string
 	{
 		// month table - start at 1 to match human usage.
 		$mtab = [' ',