Changes:

- if a <addon>_module() function is empty, it is more a statement and not a
  real function

advancedcontentfilter/advancedcontentfilter.php

@@ -180,6 +180,11 @@ function advancedcontentfilter_addon_settings(App $a, array &$data)
  * Module
  */
 
+/**
+ * This is a statement rather than an actual function definition. The simple
+ * existence of this method is checked to figure out if the addon offers a
+ * module.
+ */
 function advancedcontentfilter_module() {}
 
 function advancedcontentfilter_init(App $a)

birdavatar/birdavatar.php

@@ -136,9 +136,12 @@ function birdavatar_lookup(App $a, array &$b)
 	$b['success'] = true;
 }
 
-function birdavatar_module()
-{
-}
+/**
+ * This is a statement rather than an actual function definition. The simple
+ * existence of this method is checked to figure out if the addon offers a
+ * module.
+ */
+function birdavatar_module() {}
 
 /**
  * Returns image for user id

blockem/blockem.php

@@ -186,9 +186,12 @@ function blockem_item_photo_menu(App $a, array &$b)
 	}
 }
 
-function blockem_module()
-{
-}
+/**
+ * This is a statement rather than an actual function definition. The simple
+ * existence of this method is checked to figure out if the addon offers a
+ * module.
+ */
+function blockem_module() {}
 
 function blockem_init(App $a)
 {

calc/calc.php

@@ -19,10 +19,12 @@ function calc_app_menu(App $a, array &$b)
 	$b['app_menu'][] = '<div class="app-title"><a href="calc">Calculator</a></div>'; 
 }
 
-
-function calc_module()
-{
-}
+/**
+ * This is a statement rather than an actual function definition. The simple
+ * existence of this method is checked to figure out if the addon offers a
+ * module.
+ */
+function calc_module() {}
 
 function calc_init(App $a)
 {

catavatar/catavatar.php

@@ -137,6 +137,11 @@ function catavatar_lookup(App $a, array &$b)
 	$b['success'] = true;
 }
 
+/**
+ * This is a statement rather than an actual function definition. The simple
+ * existence of this method is checked to figure out if the addon offers a
+ * module.
+ */
 function catavatar_module() {}
 
 /**

convert/convert.php

@@ -21,41 +21,47 @@ function convert_app_menu(App $a, array &$b)
 
 function convert_module() {}
 
-function convert_content($app) {
-
+function convert_content(App $a) {
+	// @TODO UnitConverter uses a deprecated constructor with the class' name
+	// @TODO Let's one day rewrite this to a modern composer package
 	include 'UnitConvertor.php';
 
- class TP_Converter extends UnitConvertor {
-	function TP_Converter($lang = 'en')
+	class TP_Converter extends UnitConvertor
 	{
-		if ($lang != 'en' ) {
-			$dec_point = '.'; $thousand_sep = "'";
+		public function __construct(string $lang = 'en')
+		{
+			if ($lang == 'en' ) {
+				$dec_point = '.';
+				$thousand_sep = ',';
 			} else {
-			$dec_point = '.'; $thousand_sep = ',';
+				$dec_point = '.';
+				$thousand_sep = "'";
 			}
 
-		$this->UnitConvertor($dec_point , $thousand_sep );
+			parent::UnitConvertor($dec_point, $thousand_sep );
+		}
 
-	} // end func UnitConvertor
-
-	function find_base_unit($from,$to) {
+		private function findBaseUnit($from, $to)
+		{
 			while (list($skey, $sval) = each($this->bases)) {
 					if ($skey == $from || $to == $skey || in_array($to, $sval) || in_array($from, $sval)) {
 						return $skey;
 					}
 			}
+
 			return false;
 		}
 
-	function getTable($value, $from_unit, $to_unit, $precision) {
-
-		if ($base_unit = $this->find_base_unit($from_unit,$to_unit)) {
+		public function getTable($value, $from_unit, $to_unit, $precision): string
+		{
+			$string = '';
 
+			if ($base_unit = $this->findBaseUnit($from_unit, $to_unit)) {
 				// A baseunit was found now lets convert from -> $base_unit
-
 				$cell ['value'] = $this->convert($value, $from_unit, $base_unit, $precision) . ' ' . $base_unit;
 				$cell ['class'] = ($base_unit == $from_unit || $base_unit == $to_unit) ? 'framedred' : '';
 				$cells[] = $cell;
+
 				// We now have the base unit and value now lets produce the table;
 				while (list($key, $val) = each($this->bases[$base_unit])) {
 					$cell ['value'] = $this->convert($value, $from_unit, $val, $precision) . ' ' . $val;
@@ -76,9 +82,9 @@ include 'UnitConvertor.php';
 					}
 				}
 				$string .= "</tr></table>";
-			return $string;
 			}
 
+			return $string;
 		}
 	}
 
@@ -170,7 +176,6 @@ $conversions = [
 		]
 	];
 
-
 	while (list($key,$val) = each($conversions)) {
 		$conv->addConversion($val['base'], $val['conv']);
 		$list[$key][] = $val['base'];
@@ -181,7 +186,6 @@ while (list($key,$val) = each($conversions)) {
 
 	$o .= '<h3>Unit Conversions</h3>';
 
-
 	if (isset($_POST['from_unit']) && isset($_POST['value'])) {
 		$_POST['value'] = $_POST['value'] + 0;
 		$o .= ($conv->getTable($_POST['value'], $_POST['from_unit'], $_POST['to_unit'], 5)) . '</p>';

forumdirectory/forumdirectory.php

@@ -25,10 +25,17 @@ function forumdirectory_install()
 	Hook::register('app_menu', 'addon/forumdirectory/forumdirectory.php', 'forumdirectory_app_menu');
 }
 
-function forumdirectory_module()
-{
-	return;
-}
+/**
+ * This is a statement rather than an actual function definition. The simple
+ * existence of this method is checked to figure out if the addon offers a
+ * module.
+ */
+/**
+ * This is a statement rather than an actual function definition. The simple
+ * existence of this method is checked to figure out if the addon offers a
+ * module.
+ */
+function forumdirectory_module() {}
 
 function forumdirectory_app_menu(App $a, array &$b)
 {

ifttt/ifttt.php

@@ -24,15 +24,14 @@ function ifttt_install()
 	Hook::register('connector_settings_post', 'addon/ifttt/ifttt.php', 'ifttt_settings_post');
 }
 
-function ifttt_module()
-{
+/**
+ * This is a statement rather than an actual function definition. The simple
+ * existence of this method is checked to figure out if the addon offers a
+ * module.
+ */
+function ifttt_module() {}
 
-}
-
-function ifttt_content()
-{
-
-}
+function ifttt_content() {}
 
 function ifttt_settings(App $a, array &$data)
 {

impressum/impressum.php

@@ -24,9 +24,12 @@ function impressum_install()
 	Logger::notice("installed impressum Addon");
 }
 
-function impressum_module()
-{
-}
+/**
+ * This is a statement rather than an actual function definition. The simple
+ * existence of this method is checked to figure out if the addon offers a
+ * module.
+ */
+function impressum_module() {}
 
 function impressum_content()
 {

infiniteimprobabilitydrive/infiniteimprobabilitydrive.php

@@ -20,11 +20,12 @@ function infiniteimprobabilitydrive_app_menu(App $a, array &$b)
 	$b['app_menu'][] = '<div class="app-title"><a href="infiniteimprobabilitydrive">' . DI::l10n()->t('Infinite Improbability Drive') . '</a></div>';
 }
 
-
-function infiniteimprobabilitydrive_module()
-{
-	return;
-}
+/**
+ * This is a statement rather than an actual function definition. The simple
+ * existence of this method is checked to figure out if the addon offers a
+ * module.
+ */
+function infiniteimprobabilitydrive_module() {}
 
 
 function infiniteimprobabilitydrive_content(App $a)

irc/irc.php

@@ -64,11 +64,12 @@ function irc_app_menu(App $a, array &$b)
 	$b['app_menu'][] = '<div class="app-title"><a href="irc">' . DI::l10n()->t('IRC Chatroom') . '</a></div>';
 }
 
-
-function irc_module() {
-	return;
-}
-
+/**
+ * This is a statement rather than an actual function definition. The simple
+ * existence of this method is checked to figure out if the addon offers a
+ * module.
+ */
+function irc_module() {}
 
 function irc_content(App $a)
 {

mailstream/mailstream.php

@@ -58,11 +58,11 @@ function mailstream_check_version()
 }
 
 /**
- * This function indicates a module that can be wrapped in the LegacyModule class
+ * This is a statement rather than an actual function definition. The simple
+ * existence of this method is checked to figure out if the addon offers a
+ * module.
  */
-function mailstream_module()
-{
-}
+function mailstream_module() {}
 
 /**
  * Adds an item in "addon features" in the admin menu of the site
@@ -70,7 +70,7 @@ function mailstream_module()
  * @param App $a App object (unused)
  * @param string        $o HTML form data
  */
-function mailstream_addon_admin(App $a, &$o)
+function mailstream_addon_admin(App $a, string &$o)
 {
 	$frommail = DI::config()->get('mailstream', 'frommail');
 	$template = Renderer::getMarkupTemplate('admin.tpl', 'addon/mailstream/');

namethingy/namethingy.php

@@ -23,9 +23,12 @@ function namethingy_app_menu(App $a, array &$b)
 }
 
 
-function namethingy_module()
-{
-}
+/**
+ * This is a statement rather than an actual function definition. The simple
+ * existence of this method is checked to figure out if the addon offers a
+ * module.
+ */
+function namethingy_module() {}
 
 function namethingy_content(App $a)
 {

notifyall/notifyall.php

@@ -15,6 +15,11 @@ use Friendica\Core\Logger;
 use Friendica\Core\Renderer;
 use Friendica\DI;
 
+/**
+ * This is a statement rather than an actual function definition. The simple
+ * existence of this method is checked to figure out if the addon offers a
+ * module.
+ */
 function notifyall_module() {}
 
 function notifyall_addon_admin(App $a, &$o)

pumpio/pumpio.php

@@ -50,6 +50,11 @@ function pumpio_install()
 	Hook::register('check_item_notification', 'addon/pumpio/pumpio.php', 'pumpio_check_item_notification');
 }
 
+/**
+ * This is a statement rather than an actual function definition. The simple
+ * existence of this method is checked to figure out if the addon offers a
+ * module.
+ */
 function pumpio_module() {}
 
 function pumpio_content(App $a)

superblock/superblock.php

@@ -130,9 +130,13 @@ function superblock_item_photo_menu(App $a, array &$b)
 	$b['menu'][DI::l10n()->t('Block Completely')] = 'javascript:superblockBlock(\'' . $author . '\'); return false;';
 }
 
+/**
+ * This is a statement rather than an actual function definition. The simple
+ * existence of this method is checked to figure out if the addon offers a
+ * module.
+ */
 function superblock_module() {}
 
-
 function superblock_init(App $a)
 {
 	if (!local_user()) {

tictac/tictac.php

@@ -20,10 +20,12 @@ function tictac_app_menu(App $a, array &$b)
 	$b['app_menu'][] = '<div class="app-title"><a href="tictac">' . DI::l10n()->t('Three Dimensional Tic-Tac-Toe') . '</a></div>';
 }
 
-function tictac_module()
-{
-	return;
-}
+/**
+ * This is a statement rather than an actual function definition. The simple
+ * existence of this method is checked to figure out if the addon offers a
+ * module.
+ */
+function tictac_module() {}
 
 function tictac_content(App $a) {
 

tumblr/tumblr.php

@@ -29,9 +29,12 @@ function tumblr_install()
 	Hook::register('connector_settings_post', 'addon/tumblr/tumblr.php', 'tumblr_settings_post');
 }
 
-function tumblr_module()
-{
-}
+/**
+ * This is a statement rather than an actual function definition. The simple
+ * existence of this method is checked to figure out if the addon offers a
+ * module.
+ */
+function tumblr_module() {}
 
 function tumblr_content(App $a)
 {

twitter/twitter.php

@@ -1740,7 +1740,7 @@ function twitter_media_entities($post, array &$postarray, int $uriId = -1)
  * @param integer $uriId URI Id used to store tags. 0 = create a new one; -1 = don't store tags for this post.
  * @return array item array
  */
-function twitter_createpost(App $a, int $uid, $post, array $self, $create_user, bool $only_existing_contact, $noquote, int $uriId = 0): array
+function twitter_createpost(App $a, int $uid, $post, array $self, $create_user, bool $only_existing_contact, bool $noquote, int $uriId = 0): array
 {
 	$postarray = [];
 	$postarray['network'] = Protocol::TWITTER;

webrtc/webrtc.php

@@ -29,15 +29,19 @@ function webrtc_addon_admin (App $a, &$o)
 	    '$webrtcurl' => ['webrtcurl', DI::l10n()->t('WebRTC Base URL'), DI::config()->get('webrtc','webrtcurl' ), DI::l10n()->t('Page your users will create a WebRTC chat room on. For example you could use https://live.mayfirst.org .')],
 	]);
 }
+
 function webrtc_addon_admin_post (App $a)
 {
 	$url = trim($_POST['webrtcurl'] ?? '');
 	DI::config()->set('webrtc', 'webrtcurl', $url);
 }
 
-function webrtc_module() {
-	return;
-}
+/**
+ * This is a statement rather than an actual function definition. The simple
+ * existence of this method is checked to figure out if the addon offers a
+ * module.
+ */
+function webrtc_module() {}
 
 function webrtc_content(App $a)
 {

windowsphonepush/windowsphonepush.php

@@ -60,10 +60,12 @@ function windowsphonepush_install()
 }
 
 /* declare the windowsphonepush function so that /windowsphonepush url requests will land here */
-function windowsphonepush_module()
-{
-
-}
+/**
+ * This is a statement rather than an actual function definition. The simple
+ * existence of this method is checked to figure out if the addon offers a
+ * module.
+ */
+function windowsphonepush_module() {}
 
 /* Callback from the settings post function.
  * $post contains the $_POST array.