diff --git a/lib/php/libsdk/SDK/Build/Dependency/Fetcher.php b/lib/php/libsdk/SDK/Build/Dependency/Fetcher.php
index 8b8349a..00f4347 100644
--- a/lib/php/libsdk/SDK/Build/Dependency/Fetcher.php
+++ b/lib/php/libsdk/SDK/Build/Dependency/Fetcher.php
@@ -8,13 +8,23 @@ class Fetcher
 {
 	use FileOps;
 
+	/** @var string */
 	protected $host;
-	protected $port;
-	protected $stability;
-	protected $arch;
-	protected $series;
-	protected $scheme;
 
+	/** @var int */
+	protected $port;
+
+	/** @var ?string */
+	protected $stability;
+
+	/** @var ?string */
+	protected $arch;
+
+	/** @var Series */
+	protected $series;
+
+	/** @var string */
+	protected $scheme;
 
 	public function __construct(string $host, int $port, string $scheme = "https", string $arch = NULL, string $stability = NULL, Series $series = NULL)
 	{/*{{{*/
diff --git a/lib/php/libsdk/SDK/Build/Dependency/Manager.php b/lib/php/libsdk/SDK/Build/Dependency/Manager.php
index 0cd40a1..1db68cd 100644
--- a/lib/php/libsdk/SDK/Build/Dependency/Manager.php
+++ b/lib/php/libsdk/SDK/Build/Dependency/Manager.php
@@ -8,12 +8,25 @@ class Manager
 {
 	use FileOps;
 
+	/** @var string */
 	protected $stability;
+
+	/** @var string */
 	protected $arch;
+
+	/** @var string */
 	protected $path;
+
+	/** @var Cache */
 	protected $cache;
+
+	/** @var Series */
 	protected $series;
+
+	/** @var Fetcher */
 	protected $fetcher;
+
+	/** @var ?bool */
 	protected $updatesFlag = NULL;
 
 	public function __construct(string $path, string $stability, string $arch)
diff --git a/lib/php/libsdk/SDK/Build/Dependency/Package.php b/lib/php/libsdk/SDK/Build/Dependency/Package.php
index dec276b..3e5703c 100644
--- a/lib/php/libsdk/SDK/Build/Dependency/Package.php
+++ b/lib/php/libsdk/SDK/Build/Dependency/Package.php
@@ -8,9 +8,16 @@ class Package
 {
 	use FileOps;
 
+	/** @var string */
 	protected $name;
+
+	/** @var Series */
 	protected $series;
+
+	/** @var Fetcher */
 	protected $fetcher;
+
+	/** @var string */
 	protected $filepath;
 
 	public function __construct(string $name, Series $series, Fetcher $fetcher)
diff --git a/lib/php/libsdk/SDK/Build/Dependency/Series.php b/lib/php/libsdk/SDK/Build/Dependency/Series.php
index 496df97..958f195 100644
--- a/lib/php/libsdk/SDK/Build/Dependency/Series.php
+++ b/lib/php/libsdk/SDK/Build/Dependency/Series.php
@@ -8,10 +8,19 @@ use SDK\Exception;
 
 class Series
 {
+	/** @var ?Fetcher */
 	protected $fetcher;
+
+	/** @var string */
 	protected $stability;
+
+	/** @var string */
 	protected $arch;
+
+	/** @var string */
 	protected $rawData;
+
+	/** @var Cache */
 	protected $cache;
 
 	public function __construct(string $stability, string $arch, Cache $cache, Fetcher $fetcher = NULL)
@@ -59,6 +68,7 @@ class Series
 		return "$base/series/$file";
 	}/*}}}*/
 
+	/** @return array<string>|string */
 	public function getData(bool $raw = false, bool $cache = true)
 	{/*{{{*/
 		if ($cache && $this->rawData) {
diff --git a/lib/php/libsdk/SDK/Build/PGO/Abstracts/PHP.php b/lib/php/libsdk/SDK/Build/PGO/Abstracts/PHP.php
index d1d04e5..cfeb007 100644
--- a/lib/php/libsdk/SDK/Build/PGO/Abstracts/PHP.php
+++ b/lib/php/libsdk/SDK/Build/PGO/Abstracts/PHP.php
@@ -7,13 +7,25 @@ use SDK\{Config as SDKConfig, Exception};
 
 abstract class PHP
 {
+	/** @var string */
 	protected $php_root;
+
+	/** @var string */
 	protected $php_ext_root;
+
+	/** @var string */
 	protected $opcache_file_cache;
+
+	/** @var string */
 	protected $id;
+
+	/** @var string */
 	protected $scenario;
+
+	/** @var \SDK\Build\PGO\Config */
 	protected $conf;
 
+	/** @return void */
 	protected function setupPaths()
 	{
 		$this->php_root = $this->getRootDir();
@@ -38,6 +50,7 @@ abstract class PHP
 		return !file_exists("Makefile") && file_exists("php.exe");
 	}
 
+	/** @return array<string,string> */
 	protected function createEnv() : array
 	{
 		$env = getenv();
@@ -133,6 +146,7 @@ abstract class PHP
 	}
 
 	/* Need to cleanup it somewhere. */
+	/** @return string */
 	public function getIniFilename()
 	{
 		$ret = tempnam(sys_get_temp_dir(), "ini");
@@ -165,6 +179,7 @@ abstract class PHP
 		return $ret;
 	}
 
+	/** @return string */
 	protected function getIniTplFilename()
 	{
 		$tpl_path = $this->conf->getTplDir("php");
@@ -180,6 +195,7 @@ abstract class PHP
 		return $construct;
 	}
 
+	/** @param array<string,string> $extra_env */
 	public function exec(string $php_cmd, string $args = NULL, array $extra_env = array()) : int
 	{
 		$env = $this->createEnv();
diff --git a/lib/php/libsdk/SDK/Build/PGO/Abstracts/Server.php b/lib/php/libsdk/SDK/Build/PGO/Abstracts/Server.php
index f8397f3..bf4c915 100644
--- a/lib/php/libsdk/SDK/Build/PGO/Abstracts/Server.php
+++ b/lib/php/libsdk/SDK/Build/PGO/Abstracts/Server.php
@@ -6,7 +6,10 @@ use SDK\Build\PGO\Interfaces;
 
 abstract class Server
 {
+	/** @var string */
 	protected $name;
+
+	/** @var Interfaces\PHP */
 	protected $php;
 
 	public function getName() : string
diff --git a/lib/php/libsdk/SDK/Build/PGO/Abstracts/TrainingCase.php b/lib/php/libsdk/SDK/Build/PGO/Abstracts/TrainingCase.php
index 8ca21ee..20294b0 100644
--- a/lib/php/libsdk/SDK/Build/PGO/Abstracts/TrainingCase.php
+++ b/lib/php/libsdk/SDK/Build/PGO/Abstracts/TrainingCase.php
@@ -13,9 +13,13 @@ abstract class TrainingCase implements Interfaces\TrainingCase
 	const TYPE_WEB = "web";
 	const TYPE_CLI = "cli";
 
+	/** @var array<mixed> */
 	protected $stat = array();
+
 	/** @var \SDK\Build\PGO\Config */
 	protected $conf;
+
+	/** @var mixed */
 	protected $php;
 
 	abstract public function getName() : string;
diff --git a/lib/php/libsdk/SDK/Build/PGO/Config.php b/lib/php/libsdk/SDK/Build/PGO/Config.php
index faad93f..c21e8da 100644
--- a/lib/php/libsdk/SDK/Build/PGO/Config.php
+++ b/lib/php/libsdk/SDK/Build/PGO/Config.php
@@ -11,11 +11,22 @@ class Config
 	const MODE_REINIT = 2; /* currently unused */
 	const MODE_CHECK_INIT = 3;
 
+	/** @var int */
 	protected $mode;
+
+	/** @var int */
 	protected $last_port = 8081;
+
+	/** @var array<string,mixed> */
 	protected $sections = array();
+
+	/** @var string */
 	protected $scenario = "default";
+
+	/** @var array<mixed> */
 	protected $tpl_vars = array();
+
+	/** @var array<mixed> */
 	protected $srv = array();
 
 	public function __construct(int $mode = self::MODE_RUN)
@@ -67,6 +78,7 @@ class Config
 		}
 	}
 
+	/** @return bool */
 	public function isInitialized()
 	{
 		/* XXX Could be some better check. */
@@ -161,6 +173,7 @@ class Config
 		return $ret;
 	}
 
+	/** @param string ...$args */
 	public function sectionItemExists(...$args) : bool
 	{
 		$i = 0;
@@ -178,6 +191,10 @@ class Config
 		return $i == count($args);
 	}
 
+	/**
+	 * @param string  ...$args
+	 * @return mixed
+	 */
 	public function getSectionItem(...$args)
 	{
 		$i = 0;
@@ -199,6 +216,7 @@ class Config
 		return $it;
 	}
 
+	/** @param string|int ...$args */
 	public function setSectionItem(...$args) : void
 	{
 		$val = array_pop($args);
@@ -238,6 +256,7 @@ class Config
 		}
 	}
 
+	/** @param string ...$args */
 	public function buildTplVarName(...$args) : string
 	{
 		$tpl_k = array("PHP_SDK_PGO");
@@ -249,6 +268,7 @@ class Config
 		return implode("_", $tpl_k);
 	}
 
+	/** @param array<string,mixed> $section */
 	protected function importTplVars(string $section_name, array $section) : void
 	{
 		foreach($section as $k0 => $v0) {
@@ -266,6 +286,7 @@ class Config
 		}	
 	}
 
+	/** @param array<mixed> $additional_vars */
 	public function processTpl(string $s, array $additional_vars = array()) : string
 	{
 		$vars = array_merge($this->tpl_vars, $additional_vars);
@@ -275,6 +296,7 @@ class Config
 		return $s;
 	}
 
+	/** @param array<mixed> $additional_vars */
 	public function processTplFile(string $tpl_fn, string $dst_fn, array $additional_vars = array()) : void
 	{
 		if (!file_exists($tpl_fn)) {
@@ -293,6 +315,7 @@ class Config
 		}
 	}
 
+	/** @return string */
 	public function getWorkSectionsFilename()
 	{
 		return $this->getWorkDir() . DIRECTORY_SEPARATOR . "phpsdk_pgo.json";
@@ -338,6 +361,10 @@ class Config
 		return getenv("PHP_SDK_PHP_CMD");
 	}
 
+	/**
+	 * @param Interfaces\Server $item
+	 * @return void
+	 */
 	public function addSrv($item) : void
 	{
 		$name = strtolower($item->getName());
@@ -350,6 +377,7 @@ class Config
 		$this->srv[$name] = $item;
 	}
 
+	/** @return array<string,Interfaces\Server>|Interfaces\Server|null */
 	public function getSrv(?string $name = NULL)
 	{
 		$ret = NULL;
diff --git a/lib/php/libsdk/SDK/Build/PGO/Controller.php b/lib/php/libsdk/SDK/Build/PGO/Controller.php
index 644e08b..5a3cd76 100644
--- a/lib/php/libsdk/SDK/Build/PGO/Controller.php
+++ b/lib/php/libsdk/SDK/Build/PGO/Controller.php
@@ -13,11 +13,19 @@ use SDK\Build\PGO\Tool\{PGO, PackageWorkman};
 
 class Controller
 {
+	/** @var string */
 	protected $cmd;
+
+	/** @var ?string */
 	protected $scenario;
+
+	/** @var PGOConfig */
 	protected $conf;
+
+	/** @var array<string>|null */
 	protected $cases;
 
+	/** @param array<string>|null $cases */
 	public function __construct(string $cmd, ?string $scenario, ?array $cases)
 	{
 		$this->cmd = $cmd;
@@ -29,6 +37,7 @@ class Controller
 		$this->cases = $cases;
 	}
 
+	/** @return mixed */
 	protected function vitalizeSrv()
 	{
 		$all = $this->conf->getSrv("all");
@@ -47,6 +56,10 @@ class Controller
 		return $all;
 	}
 
+	/**
+	 * @param string $cmd
+	 * @return PGOConfig
+	 */
 	protected function setupConfig($cmd)
 	{
 		switch ($cmd) {
@@ -68,6 +81,10 @@ class Controller
 		return $cnf;
 	}
 
+	/**
+	 * @param bool $force
+	 * @return void
+	 */
 	public function handle($force)
 	{
 		/*$mode = (int)("init" !== $this->cmd);
@@ -146,6 +163,7 @@ class Controller
 		}
 	}
 
+	/** @return void */
 	public function init(bool $force = false)
 	{
 		echo "\nInitializing PGO training environment.\n\n";
@@ -179,11 +197,13 @@ class Controller
 		echo "PGO training environment Initialization complete.\n";
 	}
 
+	/** @return bool */
 	public function isInitialized()
 	{
 		return $this->conf->isinitialized();
 	}
 
+	/** @return void */
 	public function train()
 	{
 		if (!$this->isInitialized()) {
@@ -232,6 +252,7 @@ class Controller
 		echo "PGO training complete.\n";
 	}
 
+	/** @return void */
 	public function up()
 	{
 
@@ -250,6 +271,7 @@ class Controller
 		echo "The PGO environment is up.\n";
 	}
 
+	/** @return void */
 	public function down(bool $force = false)
 	{
 		if (!$this->isInitialized()) {
diff --git a/lib/php/libsdk/SDK/Build/PGO/Interfaces/Server.php b/lib/php/libsdk/SDK/Build/PGO/Interfaces/Server.php
index e71b2ae..0007d31 100644
--- a/lib/php/libsdk/SDK/Build/PGO/Interfaces/Server.php
+++ b/lib/php/libsdk/SDK/Build/PGO/Interfaces/Server.php
@@ -12,5 +12,7 @@ interface Server
 	public function up() : void;
 	public function down(bool $force = false) : void;
 	public function getName() : string;
+
+	/** @return \SDK\Build\PGO\Interfaces\PHP */
 	public function getPhp();
 }
diff --git a/lib/php/libsdk/SDK/Build/PGO/Interfaces/Server/HTTP.php b/lib/php/libsdk/SDK/Build/PGO/Interfaces/Server/HTTP.php
index e7a62b4..588a582 100644
--- a/lib/php/libsdk/SDK/Build/PGO/Interfaces/Server/HTTP.php
+++ b/lib/php/libsdk/SDK/Build/PGO/Interfaces/Server/HTTP.php
@@ -9,5 +9,10 @@ interface HTTP extends Interfaces\Server
 {
 	public function __construct(Config $conf, Interfaces\PHP $php);
 	public function getPhp() : Interfaces\PHP;
+
+	/**
+	 * @param array<mixed> $tpl_vars
+	 * @return void
+	 */
 	public function addServer(string $part_tpl_fn, array $tpl_vars = array());
 }
diff --git a/lib/php/libsdk/SDK/Build/PGO/PHP/FCGI.php b/lib/php/libsdk/SDK/Build/PGO/PHP/FCGI.php
index 49005c2..28c849e 100644
--- a/lib/php/libsdk/SDK/Build/PGO/PHP/FCGI.php
+++ b/lib/php/libsdk/SDK/Build/PGO/PHP/FCGI.php
@@ -12,6 +12,7 @@ class FCGI extends Abstracts\PHP implements Interfaces\PHP
 {
 	use FileOps;
 
+	/** @var bool */
 	protected $is_tcp;
 
 	public function __construct(PGOConfig $conf, bool $is_tcp)
diff --git a/lib/php/libsdk/SDK/Build/PGO/Server/MariaDB.php b/lib/php/libsdk/SDK/Build/PGO/Server/MariaDB.php
index 40d1981..c59aba0 100644
--- a/lib/php/libsdk/SDK/Build/PGO/Server/MariaDB.php
+++ b/lib/php/libsdk/SDK/Build/PGO/Server/MariaDB.php
@@ -12,8 +12,13 @@ class MariaDB extends Server implements DB
 {
 	use FileOps;
 
+	/** @var PGOConfig */
 	protected $conf;
+
+	/** @var string */
 	protected $base;
+
+	/** @var string */
 	protected $name = "MariaDB";
 
 	public function __construct(PGOConfig $conf)
@@ -22,6 +27,7 @@ class MariaDB extends Server implements DB
 		$this->base = $conf->getSrvDir(strtolower($this->name));
 	}
 
+	/** @return void */
 	protected function setupDist()
 	{
 		/* pass */
diff --git a/lib/php/libsdk/SDK/Build/PGO/Server/NGINX.php b/lib/php/libsdk/SDK/Build/PGO/Server/NGINX.php
index 0066f76..107b1d3 100644
--- a/lib/php/libsdk/SDK/Build/PGO/Server/NGINX.php
+++ b/lib/php/libsdk/SDK/Build/PGO/Server/NGINX.php
@@ -12,9 +12,16 @@ class NGINX extends Abstracts\Server implements Interfaces\Server\HTTP
 {
 	use FileOps;
 
+	/** @var string */
 	protected $name = "NGINX";
+
+	/** @var PGOConfig */
 	protected $conf;
+
+	/** @var string */
 	protected $base;
+
+	/** @var Interfaces\PHP */
 	protected $php;
 
 	public function __construct(PGOConfig $conf, Interfaces\PHP $php)
@@ -125,6 +132,10 @@ class NGINX extends Abstracts\Server implements Interfaces\Server\HTTP
 	}
 
 	/* Use only for init phase! */
+	/**
+	 * @param array<mixed> $tpl_vars
+	 * @return void
+	 */
 	public function addServer(string $part_tpl_fn, array $tpl_vars = array())
 	{
 		if (!file_exists($part_tpl_fn)) {
diff --git a/lib/php/libsdk/SDK/Build/PGO/Server/PostgreSQL.php b/lib/php/libsdk/SDK/Build/PGO/Server/PostgreSQL.php
index f42d28e..f4c08da 100644
--- a/lib/php/libsdk/SDK/Build/PGO/Server/PostgreSQL.php
+++ b/lib/php/libsdk/SDK/Build/PGO/Server/PostgreSQL.php
@@ -12,9 +12,16 @@ class PostgreSQL extends Server implements DB
 {
 	use FileOps;
 
+	/** @var PGOConfig */
 	protected $conf;
+
+	/** @var string */
 	protected $base;
+
+	/** @var string */
 	protected $data_dir;
+
+	/** @var string */
 	protected $name = "PostgreSQL";
 
 	public function __construct(PGOConfig $conf)
@@ -24,6 +31,7 @@ class PostgreSQL extends Server implements DB
 		$this->data_dir = $this->base . DIRECTORY_SEPARATOR . "data";
 	}
 
+	/** @return void */
 	protected function setupDist()
 	{
 		$user = $this->conf->getSectionItem($this->name, "user");
diff --git a/lib/php/libsdk/SDK/Build/PGO/Tool/PGO.php b/lib/php/libsdk/SDK/Build/PGO/Tool/PGO.php
index e9e025c..e592ad8 100644
--- a/lib/php/libsdk/SDK/Build/PGO/Tool/PGO.php
+++ b/lib/php/libsdk/SDK/Build/PGO/Tool/PGO.php
@@ -8,8 +8,13 @@ use SDK\Build\PGO\Interfaces;
 
 class PGO
 {
+	/** @var Interfaces\PHP */
 	protected $php;
+
+	/** @var PGOConfig */
 	protected $conf;
+
+	/** @var int */
 	protected $idx = 0;
 
 	public function __construct(PGOConfig $conf, Interfaces\PHP $php)
@@ -34,6 +39,7 @@ class PGO
 		return $dn . DIRECTORY_SEPARATOR . $bn . ".pgd";
 	}
 
+	/** @return array<string> */
 	protected function getWorkItems() : array
 	{
 		$exe = glob($this->php->getRootDir() . DIRECTORY_SEPARATOR . "*.exe");
diff --git a/lib/php/libsdk/SDK/Build/PGO/Tool/PackageWorkman.php b/lib/php/libsdk/SDK/Build/PGO/Tool/PackageWorkman.php
index b3ebd7a..9ccd2ac 100644
--- a/lib/php/libsdk/SDK/Build/PGO/Tool/PackageWorkman.php
+++ b/lib/php/libsdk/SDK/Build/PGO/Tool/PackageWorkman.php
@@ -10,6 +10,7 @@ class PackageWorkman
 {
 	use FileOps;
 
+	/** @var PGOConfig */
 	protected $conf;
 
 	public function __construct(PGOConfig $conf)
diff --git a/lib/php/libsdk/SDK/Build/PGO/Tool/Training.php b/lib/php/libsdk/SDK/Build/PGO/Tool/Training.php
index 5dd5311..68026dc 100644
--- a/lib/php/libsdk/SDK/Build/PGO/Tool/Training.php
+++ b/lib/php/libsdk/SDK/Build/PGO/Tool/Training.php
@@ -8,7 +8,10 @@ use SDK\Build\PGO\Interfaces\TrainingCase;
 
 class Training
 {
+	/** @var PGOConfig */
 	protected $conf;
+
+	/** @var TrainingCase */
 	protected $t_case;
 
 	public function __construct(PGOConfig $conf, TrainingCase $t_case)
@@ -27,6 +30,7 @@ class Training
 		return $this->t_case;
 	}
 
+	/** @param array<string,mixed> $stat */
 	public function runWeb(int $max_runs, ?array &$stat = array()) : void
 	{
 		$url_list_fn = $this->t_case->getJobFilename();
@@ -105,6 +109,7 @@ class Training
 	}
 
 	/* TODO Extend with number runs. */
+	/** @param array<string,mixed> $stat */
 	public function run(int $max_runs = 1, ?array &$stat = array()) : void
 	{
 		$type = $this->t_case->getType();
diff --git a/lib/php/libsdk/SDK/Build/PGO/TrainingCaseIterator.php b/lib/php/libsdk/SDK/Build/PGO/TrainingCaseIterator.php
index 82b06d7..f335b24 100644
--- a/lib/php/libsdk/SDK/Build/PGO/TrainingCaseIterator.php
+++ b/lib/php/libsdk/SDK/Build/PGO/TrainingCaseIterator.php
@@ -4,12 +4,21 @@ namespace SDK\Build\PGO;
 
 use SDK\Build\PGO\Config as PGOConfig;
 
-
+/**
+ * @implements \Iterator<?string,Interfaces\TrainingCase>
+ */
 class TrainingCaseIterator implements \Iterator
 {
+	/** @var PGOConfig */
 	protected $conf;
+
+	/** @var array<string> */
 	protected $items = array();
+
+	/** @var int */
 	protected $idx;
+
+	/** @var object */
 	protected $el;
 
 	public function __construct(PGOConfig $conf)
diff --git a/lib/php/libsdk/SDK/Cache.php b/lib/php/libsdk/SDK/Cache.php
index b026fdb..4b3f429 100644
--- a/lib/php/libsdk/SDK/Cache.php
+++ b/lib/php/libsdk/SDK/Cache.php
@@ -4,7 +4,10 @@ namespace SDK;
 
 class Cache
 {
+	/** @var string */
 	protected $id;
+
+	/** @var string */
 	protected $hash;
 
 	public function __construct(string $id)
diff --git a/lib/php/libsdk/SDK/Config.php b/lib/php/libsdk/SDK/Config.php
index 49857db..ce5f279 100644
--- a/lib/php/libsdk/SDK/Config.php
+++ b/lib/php/libsdk/SDK/Config.php
@@ -7,20 +7,40 @@ use SDK\Build\Dependency\Fetcher;
 class Config
 {
 	/* Config variables. */
+
+	/** @var string */
 	protected static $depsHost = 'downloads.php.net';
+
+	/** @var int */
 	protected static $depsPort = 443;
+
+	/** @var string */
 	protected static $depsUriScheme = "https";
+
+	/** @var string */
 	protected static $depsBaseUri = "/~windows/php-sdk/deps";
 
+	/** @var string */
 	protected static $sdkNugetFeedUrl = "http://127.0.0.1/sdk/nuget"; // experimental?
 
+	/** @var array<mixed> */
 	protected static $knownBranches = array ();
 
 	/* Helper props and methods. */
+
+	/** @var ?string */
 	protected static $currentBranchName = NULL;
+
+	/** @var ?string */
 	protected static $currentArchName = NULL;
+
+	/** @var ?string */
 	protected static $currentCrtName = NULL;
+
+	/** @var ?string */
 	protected static $currentStabilityName = NULL;
+
+	/** @var ?string */
 	protected static $depsLocalPath = NULL;
 
 	public static function getDepsHost() : string
@@ -134,6 +154,7 @@ class Config
 		return self::$currentStabilityName;
 	}	/*}}}*/
 
+	/** @return array<mixed> */
 	public static function getKnownBranches() : array
 	{/*{{{*/
 		if (empty(self::$knownBranches)) {
@@ -254,6 +275,7 @@ class Config
 		return self::$currentBranchName;
 	}/*}}}*/
 
+	/** @return array<mixed> */
 	public static function getCurrentBranchData() : array
 	{/*{{{*/
 		$ret = array();
diff --git a/lib/php/libsdk/SDK/Lock.php b/lib/php/libsdk/SDK/Lock.php
index bdcef62..cc4a2a8 100644
--- a/lib/php/libsdk/SDK/Lock.php
+++ b/lib/php/libsdk/SDK/Lock.php
@@ -4,10 +4,19 @@ namespace SDK;
 
 class Lock
 {
+	/** @var ?resource */
 	protected $fd;
+
+	/** @var string */
 	protected $fn;
+
+	/** @var bool */
 	protected $locked = false;
+
+	/** @var bool|int */
 	protected $wouldBlock = false;
+
+	/** @var bool|int */
 	protected $shared = false;
 
 	public function __construct(string $tag, bool $auto = true, bool $autoShared = false)
diff --git a/pgo/cases/drupal/TrainingCaseHandler.php b/pgo/cases/drupal/TrainingCaseHandler.php
index 2c50c87..d5d5fda 100644
--- a/pgo/cases/drupal/TrainingCaseHandler.php
+++ b/pgo/cases/drupal/TrainingCaseHandler.php
@@ -11,9 +11,16 @@ use SDK\Build\PGO\Tool;
 
 class TrainingCaseHandler extends Abstracts\TrainingCase implements Interfaces\TrainingCase
 {
+	/** @var string */
 	protected $base;
+
+	/** @var ?Interfaces\Server $nginx */
 	protected $nginx;
+
+	/** @var mixed */
 	protected $php;
+
+	/** @var int */
 	protected $max_runs = 8;
 
 	public function __construct(Config $conf, ?Interfaces\Server $nginx, ?Interfaces\Server\DB $maria)
@@ -65,6 +72,7 @@ class TrainingCaseHandler extends Abstracts\TrainingCase implements Interfaces\T
 		$this->nginx->addServer($tpl_fn, $vars);
 	}
 
+	/** @return void */
 	public function setupUrls()
 	{
 		$this->nginx->up();
diff --git a/pgo/cases/joomla/TrainingCaseHandler.php b/pgo/cases/joomla/TrainingCaseHandler.php
index b199fde..cbda00e 100644
--- a/pgo/cases/joomla/TrainingCaseHandler.php
+++ b/pgo/cases/joomla/TrainingCaseHandler.php
@@ -11,10 +11,19 @@ use SDK\Build\PGO\Tool;
 
 class TrainingCaseHandler extends Abstracts\TrainingCase implements Interfaces\TrainingCase
 {
+	/** @var string */
 	protected $base;
+
+	/** @var ?Interfaces\Server $nginx */
 	protected $nginx;
+
+	/** @var mixed */
 	protected $php;
+
+	/** @var ?Interfaces\Server\DB */
 	protected $maria;
+
+	/** @var int */
 	protected $max_runs = 4;
 
 	public function __construct(Config $conf, ?Interfaces\Server $nginx, ?Interfaces\Server\DB $maria)
@@ -99,6 +108,7 @@ class TrainingCaseHandler extends Abstracts\TrainingCase implements Interfaces\T
 		$this->maria->down(true);
 	}
 
+	/** @return void */
 	public function setupUrls()
 	{
 		$this->maria->up();
diff --git a/pgo/cases/mediawiki/TrainingCaseHandler.php b/pgo/cases/mediawiki/TrainingCaseHandler.php
index eca3783..375b4d7 100644
--- a/pgo/cases/mediawiki/TrainingCaseHandler.php
+++ b/pgo/cases/mediawiki/TrainingCaseHandler.php
@@ -11,9 +11,16 @@ use SDK\Build\PGO\Tool;
 
 class TrainingCaseHandler extends Abstracts\TrainingCase implements Interfaces\TrainingCase
 {
+	/** @var string */
 	protected $base;
+
+	/** @var ?Interfaces\Server $nginx */
 	protected $nginx;
+
+	/** @var mixed */
 	protected $php;
+
+	/** @var int */
 	protected $max_runs = 4;
 
 	public function __construct(Config $conf, ?Interfaces\Server $nginx, ?Interfaces\Server\DB $srv_db)
@@ -82,6 +89,7 @@ class TrainingCaseHandler extends Abstracts\TrainingCase implements Interfaces\T
 		$php->exec($cmd);
 	}
 
+	/** @return void */
 	public function setupUrls()
 	{
 		$this->nginx->up();
diff --git a/pgo/cases/pgo01org/TrainingCaseHandler.php b/pgo/cases/pgo01org/TrainingCaseHandler.php
index 25656a3..b4372d0 100644
--- a/pgo/cases/pgo01org/TrainingCaseHandler.php
+++ b/pgo/cases/pgo01org/TrainingCaseHandler.php
@@ -11,10 +11,19 @@ use SDK\Build\PGO\Tool;
 
 class TrainingCaseHandler extends Abstracts\TrainingCase implements Interfaces\TrainingCase
 {
+	/** @var string */
 	protected $base;
+
+	/** @var ?Interfaces\Server $nginx */
 	protected $nginx;
+
+	/** @var ?Interfaces\Server\DB */
 	protected $maria;
+
+	/** @var mixed */
 	protected $php;
+
+	/** @var int */
 	protected $max_runs = 12;
 
 	public function __construct(Config $conf, ?Interfaces\Server $nginx, ?Interfaces\Server\DB $maria)
@@ -119,6 +128,7 @@ class TrainingCaseHandler extends Abstracts\TrainingCase implements Interfaces\T
 
 	}
 
+	/** @return void */
 	public function setupUrls()
 	{
 		$url = "http://" . $this->getHttpHost() . ":" . $this->getHttpPort();
diff --git a/pgo/cases/symfony_demo/TrainingCaseHandler.php b/pgo/cases/symfony_demo/TrainingCaseHandler.php
index e8d0a61..9259378 100644
--- a/pgo/cases/symfony_demo/TrainingCaseHandler.php
+++ b/pgo/cases/symfony_demo/TrainingCaseHandler.php
@@ -11,9 +11,16 @@ use SDK\Build\PGO\Tool;
 
 class TrainingCaseHandler extends Abstracts\TrainingCase implements Interfaces\TrainingCase
 {
+	/** @var string */
 	protected $base;
+
+	/** @var ?Interfaces\Server $nginx */
 	protected $nginx;
+
+	/** @var mixed */
 	protected $php;
+
+	/** @var int */
 	protected $max_runs = 4;
 
 	public function __construct(Config $conf, ?Interfaces\Server $nginx, ?Interfaces\Server\DB $srv_db)
@@ -61,6 +68,7 @@ class TrainingCaseHandler extends Abstracts\TrainingCase implements Interfaces\T
 		$this->nginx->addServer($tpl_fn, $vars);
 	}
 
+	/** @return void */
 	public function setupUrls()
 	{
 		$this->nginx->up();
diff --git a/pgo/cases/symfony_demo_pdo_mysql/TrainingCaseHandler.php b/pgo/cases/symfony_demo_pdo_mysql/TrainingCaseHandler.php
index 6835af9..f0d8bee 100644
--- a/pgo/cases/symfony_demo_pdo_mysql/TrainingCaseHandler.php
+++ b/pgo/cases/symfony_demo_pdo_mysql/TrainingCaseHandler.php
@@ -11,10 +11,19 @@ use SDK\Build\PGO\Tool;
 
 class TrainingCaseHandler extends Abstracts\TrainingCase implements Interfaces\TrainingCase
 {
+	/** @var string */
 	protected $base;
+
+	/** @var ?Interfaces\Server $nginx */
 	protected $nginx;
+
+	/** @var ?Interfaces\Server\DB */
 	protected $maria;
+
+	/** @var mixed */
 	protected $php;
+
+	/** @var int */
 	protected $max_runs = 4;
 
 	public function __construct(Config $conf, ?Interfaces\Server $nginx, ?Interfaces\Server\DB $srv_db)
@@ -80,6 +89,7 @@ class TrainingCaseHandler extends Abstracts\TrainingCase implements Interfaces\T
 		$this->nginx->addServer($tpl_fn, $vars);
 	}
 
+	/** @return void */
 	public function setupUrls()
 	{
 		$this->maria->up();
diff --git a/pgo/cases/wordpress/TrainingCaseHandler.php b/pgo/cases/wordpress/TrainingCaseHandler.php
index b8b1c3d..f15fc3e 100644
--- a/pgo/cases/wordpress/TrainingCaseHandler.php
+++ b/pgo/cases/wordpress/TrainingCaseHandler.php
@@ -11,10 +11,19 @@ use SDK\Build\PGO\Tool;
 
 class TrainingCaseHandler extends Abstracts\TrainingCase implements Interfaces\TrainingCase
 {
+	/** @var string */
 	protected $base;
+
+	/** @var ?Interfaces\Server $nginx */
 	protected $nginx;
+
+	/** @var ?Interfaces\Server\DB */
 	protected $maria;
+
+	/** @var mixed */
 	protected $php;
+
+	/** @var int */
 	protected $max_runs = 4;
 
 	public function __construct(Config $conf, ?Interfaces\Server $nginx, ?Interfaces\Server\DB $maria)
@@ -106,6 +115,7 @@ class TrainingCaseHandler extends Abstracts\TrainingCase implements Interfaces\T
 
 	}
 
+	/** @return void */
 	public function setupUrls()
 	{
 		$this->maria->up();