diff --git a/lib/CHANGELOG.md b/lib/CHANGELOG.md
index b406321c4..b98111f71 100644
--- a/lib/CHANGELOG.md
+++ b/lib/CHANGELOG.md
@@ -1,19 +1,34 @@
 CHANGELOG
 
+3.7.3
+*   NEW: added auto_increment detection, [bcosca/fatfree#1192](https://github.com/bcosca/fatfree/issues/1192), [bcosca/fatfree#1093](https://github.com/bcosca/fatfree/issues/1093), [bcosca/fatfree#1175](https://github.com/bcosca/fatfree/issues/1175), [#290](https://github.com/bcosca/fatfree-core/issues/290)
+*   added SMTP dialog error handling, [#317](https://github.com/bcosca/fatfree-core/issues/317)
+*   Fix: Check active transaction before rollback/commit (PHP8 issue)
+*   refactored increment/decrement operator to preceed variables
+*   added error output in CLI mode, [bcosca/fatfree#1185](https://github.com/bcosca/fatfree/issues/1185)
+*   Set PORT to 80 when SERVER_PORT is an empty string
+*   Fix: unescape dbname when extracting from dsn, [#316](https://github.com/bcosca/fatfree-core/issues/316)
+*   Fix: handling of PDO prepare() errors
+*   Fix: edge case in DB\SQL->schema(): PK not detected in PgSQL when the column is also a FK [bcosca/fatfree#1207](https://github.com/bcosca/fatfree/issues/1207)
+*   Fix: Escape literal hyphens in regex character classes, [bcosca/fatfree#1206](https://github.com/bcosca/fatfree/issues/1206)
+*   Fix: error highlighting
+*   Fix: pagination with order by on virtual fields
+*   Fixed a couple PHPDOC issues
+ 
 3.7.2 (28 May 2020)
-*   CHANGED, View->sandbox: disable escaping when rendering as text/plain, bcosca/fatfree#654
-*   update HTTP protocol checks, #bcosca/fatfree#1190
-*   Base->clear: close vulnerability on variable compilation, bcosca/fatfree#1191
-*   DB\SQL\Mapper: fix empty ID after insert, bcosca/fatfree#1175
+*   CHANGED, View->sandbox: disable escaping when rendering as text/plain, [bcosca/fatfree#654](https://github.com/bcosca/fatfree/issues/654)
+*   update HTTP protocol checks, [bcosca/fatfree#1190](https://github.com/bcosca/fatfree/issues/1190)
+*   Base->clear: close vulnerability on variable compilation, [bcosca/fatfree#1191](https://github.com/bcosca/fatfree/issues/1191)
+*   DB\SQL\Mapper: fix empty ID after insert, [bcosca/fatfree#1175](https://github.com/bcosca/fatfree/issues/1175)
 *   DB\SQL\Mapper: fix using correct key variable for grouped sql pagination sets
-*   Fix return type of 'count' in Cursor->paginate() (bcosca/fatfree#1187)
-*   Bug fix, Web->minify: fix minification of ES6 template literals, bcosca/fatfree#1178
-*   Bug fix, config: refactoring custom section parser regex, bcosca/fatfree#1149
-*   Bug fix: token resolve on non-alias reroute paths, ref. 221f0c930f8664565c9825faeb9ed9af0f7a01c8
+*   Fix return type of 'count' in Cursor->paginate(), [bcosca/fatfree#1187](https://github.com/bcosca/fatfree/issues/1187)
+*   Bug fix, Web->minify: fix minification of ES6 template literals, [bcosca/fatfree#1178](https://github.com/bcosca/fatfree/issues/1178)
+*   Bug fix, config: refactoring custom section parser regex, [bcosca/fatfree#1149](https://github.com/bcosca/fatfree/issues/1149)
+*   Bug fix: token resolve on non-alias reroute paths, [ref. 221f0c9](https://github.com/bcosca/fatfree-core/commit/221f0c930f8664565c9825faeb9ed9af0f7a01c8)
 *   Websocket: Improved event handler usage
 *   optimized internal get calls
 *   only use cached lexicon when a $ttl was given
-*   only use money_format up until php7.4, fixes bcosca/fatfree#1174
+*   only use money_format up until php7.4, [bcosca/fatfree#1174](https://github.com/bcosca/fatfree/issues/1174)
 
 3.7.1 (30. December 2019)
 *   Base->build: Add support for brace-enclosed route tokens
diff --git a/lib/audit.php b/lib/audit.php
index 8fcc95ae5..a0d4338e6 100644
--- a/lib/audit.php
+++ b/lib/audit.php
@@ -145,7 +145,7 @@ function mod10($id) {
 			return FALSE;
 		$id=strrev($id);
 		$sum=0;
-		for ($i=0,$l=strlen($id);$i<$l;$i++)
+		for ($i=0,$l=strlen($id);$i<$l;++$i)
 			$sum+=$id[$i]+$i%2*(($id[$i]>4)*-4+$id[$i]%5);
 		return !($sum%10);
 	}
diff --git a/lib/base.php b/lib/base.php
index ea72e7c31..dfb59c193 100644
--- a/lib/base.php
+++ b/lib/base.php
@@ -45,7 +45,7 @@ final class Base extends Prefab implements ArrayAccess {
 	//@{ Framework details
 	const
 		PACKAGE='Fat-Free Framework',
-		VERSION='3.7.2-Release';
+		VERSION='3.7.3-Release';
 	//@}
 
 	//@{ HTTP status codes (RFC 2616)
@@ -186,7 +186,7 @@ function($match) use(&$i,$args) {
 						array_key_exists($match[3],$args)) {
 						if (!is_array($args[$match[3]]))
 							return $args[$match[3]];
-						$i++;
+						++$i;
 						return $args[$match[3]][$i-1];
 					}
 					return $match[0];
@@ -1293,10 +1293,10 @@ function trace(array $trace=NULL,$format=TRUE) {
 			function($frame) use($debug) {
 				return isset($frame['file']) &&
 					($debug>1 ||
-					($frame['file']!=__FILE__ || $debug) &&
+					(($frame['file']!=__FILE__ || $debug) &&
 					(empty($frame['function']) ||
 					!preg_match('/^(?:(?:trigger|user)_error|'.
-						'__call|call_user_func)/',$frame['function'])));
+						'__call|call_user_func)/',$frame['function']))));
 			}
 		);
 		if (!$format)
@@ -1349,8 +1349,8 @@ function error($code,$text='',array $trace=NULL,$level=0) {
 						error_log($nexus);
 				break;
 			}
-		if ($highlight=!$this->hive['CLI'] && !$this->hive['AJAX'] &&
-			$this->hive['HIGHLIGHT'] && is_file($css=__DIR__.'/'.self::CSS))
+		if ($highlight=(!$this->hive['CLI'] && !$this->hive['AJAX'] &&
+			$this->hive['HIGHLIGHT'] && is_file($css=__DIR__.'/'.self::CSS)))
 			$trace=$this->highlight($trace);
 		$this->hive['ERROR']=[
 			'status'=>$header,
@@ -1366,29 +1366,34 @@ function error($code,$text='',array $trace=NULL,$level=0) {
 		if ((!$handler ||
 			$this->call($handler,[$this,$this->hive['PARAMS']],
 				'beforeroute,afterroute')===FALSE) &&
-			!$prior && !$this->hive['CLI'] && !$this->hive['QUIET'])
-			echo $this->hive['AJAX']?
-				json_encode(
-					array_diff_key(
-						$this->hive['ERROR'],
-						$this->hive['DEBUG']?
-							[]:
-							['trace'=>1]
-					)
-				):
-				('<!DOCTYPE html>'.$eol.
-				'<html>'.$eol.
-				'<head>'.
-					'<title>'.$code.' '.$header.'</title>'.
-					($highlight?
-						('<style>'.$this->read($css).'</style>'):'').
-				'</head>'.$eol.
-				'<body>'.$eol.
-					'<h1>'.$header.'</h1>'.$eol.
-					'<p>'.$this->encode($text?:$req).'</p>'.$eol.
-					($this->hive['DEBUG']?('<pre>'.$trace.'</pre>'.$eol):'').
-				'</body>'.$eol.
-				'</html>');
+			!$prior && !$this->hive['QUIET']) {
+			$error=array_diff_key(
+				$this->hive['ERROR'],
+				$this->hive['DEBUG']?
+					[]:
+					['trace'=>1]
+			);
+			if ($this->hive['CLI'])
+				echo PHP_EOL.'==================================='.PHP_EOL.
+					'ERROR '.$error['code'].' - '.$error['status'].PHP_EOL.
+					$error['text'].PHP_EOL.PHP_EOL.$error['trace'];
+			else
+				echo $this->hive['AJAX']?
+					json_encode($error):
+					('<!DOCTYPE html>'.$eol.
+					'<html>'.$eol.
+					'<head>'.
+						'<title>'.$code.' '.$header.'</title>'.
+						($highlight?
+							('<style>'.$this->read($css).'</style>'):'').
+					'</head>'.$eol.
+					'<body>'.$eol.
+						'<h1>'.$header.'</h1>'.$eol.
+						'<p>'.$this->encode($text?:$req).'</p>'.$eol.
+						($this->hive['DEBUG']?('<pre>'.$trace.'</pre>'.$eol):'').
+					'</body>'.$eol.
+					'</html>');
+		}
 		if ($this->hive['HALT'])
 			die(1);
 	}
@@ -1615,7 +1620,7 @@ function mask($pattern,$url=NULL) {
 		$i=0;
 		while (is_int($pos=strpos($wild,'\*'))) {
 			$wild=substr_replace($wild,'(?P<_'.$i.'>[^\?]*)',$pos,2);
-			$i++;
+			++$i;
 		}
 		preg_match('/^'.
 			preg_replace(
@@ -1767,7 +1772,7 @@ function($id) use($args) {
 						$ctr=0;
 						foreach (str_split($body,1024) as $part) {
 							// Throttle output
-							$ctr++;
+							++$ctr;
 							if ($ctr/$kbps>($elapsed=microtime(TRUE)-$now) &&
 								!connection_aborted())
 								usleep(1e6*($ctr/$kbps-$elapsed));
@@ -2197,7 +2202,7 @@ protected function autoload($class) {
 			isset($path[1]) && is_callable($path[1]))
 			list($path,$func)=$path;
 		foreach ($this->split($this->hive['PLUGINS'].';'.$path) as $auto)
-			if ($func && is_file($file=$func($auto.$class).'.php') ||
+			if (($func && is_file($file=$func($auto.$class).'.php')) ||
 				is_file($file=$auto.$class.'.php') ||
 				is_file($file=$auto.strtolower($class).'.php') ||
 				is_file($file=strtolower($auto.$class).'.php'))
@@ -2345,11 +2350,11 @@ function($level,$text,$file,$line) {
 		if (!isset($_SERVER['SERVER_NAME']) || $_SERVER['SERVER_NAME']==='')
 			$_SERVER['SERVER_NAME']=gethostname();
 		$headers=[];
-		if ($cli=PHP_SAPI=='cli') {
+		if ($cli=(PHP_SAPI=='cli')) {
 			// Emulate HTTP request
 			$_SERVER['REQUEST_METHOD']='GET';
 			if (!isset($_SERVER['argv'][1])) {
-				$_SERVER['argc']++;
+				++$_SERVER['argc'];
 				$_SERVER['argv'][1]='/';
 			}
 			$req=$query='';
@@ -2433,9 +2438,9 @@ function($level,$text,$file,$line) {
 			'samesite'=>'Lax',
 		];
 		$port=80;
-		if (isset($headers['X-Forwarded-Port']))
+		if (!empty($headers['X-Forwarded-Port']))
 			$port=$headers['X-Forwarded-Port'];
-		elseif (isset($_SERVER['SERVER_PORT']))
+		elseif (!empty($_SERVER['SERVER_PORT']))
 			$port=$_SERVER['SERVER_PORT'];
 		// Default configuration
 		$this->hive+=[
@@ -2496,7 +2501,7 @@ function($level,$text,$file,$line) {
 			'QUIET'=>FALSE,
 			'RAW'=>FALSE,
 			'REALM'=>$scheme.'://'.$_SERVER['SERVER_NAME'].
-				($port && !in_array($port,[80,443])?(':'.$port):'').
+				(!in_array($port,[80,443])?(':'.$port):'').
 				$_SERVER['REQUEST_URI'],
 			'RESPONSE'=>'',
 			'ROOT'=>$_SERVER['DOCUMENT_ROOT'],
@@ -2740,7 +2745,7 @@ function reset($suffix=NULL) {
 			case 'xcache':
 				if ($suffix && !ini_get('xcache.admin.enable_auth')) {
 					$cnt=xcache_count(XC_TYPE_VAR);
-					for ($i=0;$i<$cnt;$i++) {
+					for ($i=0;$i<$cnt;++$i) {
 						$list=xcache_list(XC_TYPE_VAR,$i);
 						foreach ($list['cache_list'] as $item)
 							if (preg_match($regex,$item['name']))
@@ -2898,10 +2903,10 @@ protected function sandbox(array $hive=NULL,$mime=NULL) {
 		unset($fw,$hive,$implicit,$mime);
 		extract($this->temp);
 		$this->temp=NULL;
-		$this->level++;
+		++$this->level;
 		ob_start();
 		require($this->file);
-		$this->level--;
+		--$this->level;
 		return ob_get_clean();
 	}
 
diff --git a/lib/bcrypt.php b/lib/bcrypt.php
index f044ff1dd..414daa739 100644
--- a/lib/bcrypt.php
+++ b/lib/bcrypt.php
@@ -56,7 +56,7 @@ function hash($pw,$salt=NULL,$cost=self::COST) {
 			if (!$iv && extension_loaded('openssl'))
 				$iv=openssl_random_pseudo_bytes($raw);
 			if (!$iv)
-				for ($i=0;$i<$raw;$i++)
+				for ($i=0;$i<$raw;++$i)
 					$iv.=chr(mt_rand(0,255));
 			$salt=str_replace('+','.',base64_encode($iv));
 		}
@@ -88,7 +88,7 @@ function verify($pw,$hash) {
 		if ($len!=strlen($hash) || $len<14)
 			return FALSE;
 		$out=0;
-		for ($i=0;$i<$len;$i++)
+		for ($i=0;$i<$len;++$i)
 			$out|=(ord($val[$i])^ord($hash[$i]));
 		return $out===0;
 	}
diff --git a/lib/cli/ws.php b/lib/cli/ws.php
index f1573c010..4545e9bcc 100644
--- a/lib/cli/ws.php
+++ b/lib/cli/ws.php
@@ -424,16 +424,16 @@ function fetch() {
 			}
 			else
 			if ($len==0x7f) {
-				for ($i=0,$len=0;$i<8;$i++)
+				for ($i=0,$len=0;$i<8;++$i)
 					$len=$len*256+ord($buf[$i+2]);
 				$pos+=8;
 			}
-			for ($i=0,$mask=[];$i<4;$i++)
+			for ($i=0,$mask=[];$i<4;++$i)
 				$mask[$i]=ord($buf[$pos+$i]);
 			$pos+=4;
 			if (strlen($buf)<$len+$pos)
 				return FALSE;
-			for ($i=0,$data='';$i<$len;$i++)
+			for ($i=0,$data='';$i<$len;++$i)
 				$data.=chr(ord($buf[$pos+$i])^$mask[$i%4]);
 			// Dispatch
 			switch ($op & WS::OpCode) {
diff --git a/lib/db/jig/mapper.php b/lib/db/jig/mapper.php
index 784b2a8f0..5d26427f0 100644
--- a/lib/db/jig/mapper.php
+++ b/lib/db/jig/mapper.php
@@ -206,7 +206,7 @@ function($_row) use($fw,$args,$tokens) {
 							if (is_string($token))
 								if ($token=='?') {
 									// Positional
-									$ctr++;
+									++$ctr;
 									$key=$ctr;
 								}
 								else {
diff --git a/lib/db/sql.php b/lib/db/sql.php
index 4e464d7e8..566b94a73 100644
--- a/lib/db/sql.php
+++ b/lib/db/sql.php
@@ -66,7 +66,9 @@ function begin() {
 	*	@return bool
 	**/
 	function rollback() {
-		$out=$this->pdo->rollback();
+		$out=FALSE;
+		if ($this->pdo->inTransaction())
+			$out=$this->pdo->rollback();
 		$this->trans=FALSE;
 		return $out;
 	}
@@ -76,7 +78,9 @@ function rollback() {
 	*	@return bool
 	**/
 	function commit() {
-		$out=$this->pdo->commit();
+		$out=FALSE;
+		if ($this->pdo->inTransaction())
+			$out=$this->pdo->commit();
 		$this->trans=FALSE;
 		return $out;
 	}
@@ -173,7 +177,7 @@ function exec($cmds,$args=NULL,$ttl=0,$log=TRUE,$stamp=FALSE) {
 		$fw=\Base::instance();
 		$cache=\Cache::instance();
 		$result=FALSE;
-		for ($i=0;$i<$count;$i++) {
+		for ($i=0;$i<$count;++$i) {
 			$cmd=$cmds[$i];
 			$arg=$args[$i];
 			// ensure 1-based arguments
@@ -257,7 +261,7 @@ function exec($cmds,$args=NULL,$ttl=0,$log=TRUE,$stamp=FALSE) {
 				$query->closecursor();
 				unset($query);
 			}
-			elseif (($error=$this->errorinfo()) && $error[0]!=\PDO::ERR_NONE) {
+			elseif (($error=$this->pdo->errorInfo()) && $error[0]!=\PDO::ERR_NONE) {
 				// PDO-level error occurred
 				if ($this->trans)
 					$this->rollback();
@@ -321,19 +325,37 @@ function schema($table,$fields=NULL,$ttl=0) {
 		if (strpos($table,'.'))
 			list($schema,$table)=explode('.',$table);
 		// Supported engines
+		// format: engine_name => array of:
+		//	0: query
+		//	1: field name of column name
+		//	2: field name of column type
+		//	3: field name of default value
+		//	4: field name of nullable value
+		//	5: expected field value to be nullable
+		//	6: field name of primary key flag
+		//	7: expected field value to be a primary key
+		//	8: field name of auto increment check (optional)
+		//	9: expected field value to be an auto-incremented identifier
 		$cmd=[
 			'sqlite2?'=>[
-				'PRAGMA table_info(`'.$table.'`)',
-				'name','type','dflt_value','notnull',0,'pk',TRUE],
+				'SELECT * FROM pragma_table_info('.$this->quote($table).') JOIN ('.
+					'SELECT sql FROM sqlite_master WHERE type=\'table\' AND '.
+					'name='.$this->quote($table).')',
+				'name','type','dflt_value','notnull',0,'pk',TRUE,'sql',
+					'/\W(%s)\W+[^,]+?AUTOINCREMENT\W/i'],
 			'mysql'=>[
 				'SHOW columns FROM `'.$this->dbname.'`.`'.$table.'`',
-				'Field','Type','Default','Null','YES','Key','PRI'],
+				'Field','Type','Default','Null','YES','Key','PRI','Extra','auto_increment'],
 			'mssql|sqlsrv|sybase|dblib|pgsql|odbc'=>[
 				'SELECT '.
 					'C.COLUMN_NAME AS field,'.
 					'C.DATA_TYPE AS type,'.
 					'C.COLUMN_DEFAULT AS defval,'.
 					'C.IS_NULLABLE AS nullable,'.
+				($this->engine=='pgsql'
+					?'COALESCE(POSITION(\'nextval\' IN C.COLUMN_DEFAULT),0) AS autoinc,'
+					:'columnproperty(object_id(C.TABLE_NAME),C.COLUMN_NAME,\'IsIdentity\')'
+						.' AS autoinc,').
 					'T.CONSTRAINT_TYPE AS pkey '.
 				'FROM INFORMATION_SCHEMA.COLUMNS AS C '.
 				'LEFT OUTER JOIN '.
@@ -356,7 +378,7 @@ function schema($table,$fields=NULL,$ttl=0) {
 					($this->dbname?
 						(' AND C.TABLE_CATALOG='.
 							$this->quote($this->dbname)):''),
-				'field','type','defval','nullable','YES','pkey','PRIMARY KEY'],
+				'field','type','defval','nullable','YES','pkey','PRIMARY KEY','autoinc',1],
 			'oci'=>[
 				'SELECT c.column_name AS field, '.
 					'c.data_type AS type, '.
@@ -390,15 +412,22 @@ function schema($table,$fields=NULL,$ttl=0) {
 						foreach ($conv as $regex=>$type)
 							if (preg_match('/'.$regex.'/i',$row[$val[2]]))
 								break;
-						$rows[$row[$val[1]]]=[
-							'type'=>$row[$val[2]],
-							'pdo_type'=>$type,
-							'default'=>is_string($row[$val[3]])?
-								preg_replace('/^\s*([\'"])(.*)\1\s*/','\2',
-								$row[$val[3]]):$row[$val[3]],
-							'nullable'=>$row[$val[4]]==$val[5],
-							'pkey'=>$row[$val[6]]==$val[7]
-						];
+						if (!isset($rows[$row[$val[1]]])) // handle duplicate rows in PgSQL
+							$rows[$row[$val[1]]]=[
+								'type'=>$row[$val[2]],
+								'pdo_type'=>$type,
+								'default'=>is_string($row[$val[3]])?
+									preg_replace('/^\s*([\'"])(.*)\1\s*/','\2',
+									$row[$val[3]]):$row[$val[3]],
+								'nullable'=>$row[$val[4]]==$val[5],
+								'pkey'=>$row[$val[6]]==$val[7],
+								'auto_inc'=>isset($val[8]) && isset($row[$val[8]])
+									? ($this->engine=='sqlite'?
+										(bool) preg_match(sprintf($val[9],$row[$val[1]]),
+											$row[$val[8]]):
+										($row[$val[8]]==$val[9])
+									) : NULL,
+							];
 					}
 				if ($fw->CACHE && $ttl)
 					// Save to cache backend
@@ -510,7 +539,7 @@ function __construct($dsn,$user=NULL,$pw=NULL,array $options=NULL) {
 		$fw=\Base::instance();
 		$this->uuid=$fw->hash($this->dsn=$dsn);
 		if (preg_match('/^.+?(?:dbname|database)=(.+?)(?=;|$)/is',$dsn,$parts))
-			$this->dbname=$parts[1];
+			$this->dbname=str_replace('\\ ',' ',$parts[1]);
 		if (!$options)
 			$options=[];
 		if (isset($parts[0]) && strstr($parts[0],':',TRUE)=='mysql')
diff --git a/lib/db/sql/mapper.php b/lib/db/sql/mapper.php
index 1eb45c6d0..574cc9fbd 100644
--- a/lib/db/sql/mapper.php
+++ b/lib/db/sql/mapper.php
@@ -378,6 +378,9 @@ function count($filter=NULL,array $options=NULL,$ttl=0) {
 			// for simple count just add a new adhoc counter
 			$fields='COUNT(*) AS '.$this->db->quotekey('_rows');
 		}
+		// no need to order for a count query as that could include virtual
+		// field references that are not present here
+		unset($options['order']);
 		list($sql,$args)=$this->stringify($fields,$filter,$options);
 		if ($subquery_mode)
 			$sql='SELECT COUNT(*) AS '.$this->db->quotekey('_rows').' '.
@@ -438,27 +441,30 @@ function insert() {
 			// duplicate record
 			foreach ($this->fields as $key=>&$field) {
 				$field['changed']=true;
-				if ($field['pkey'] && !$inc && $field['pdo_type']==\PDO::PARAM_INT
-					&& !$field['nullable'])
+				if ($field['pkey'] && !$inc && ($field['auto_inc'] === TRUE ||
+						($field['auto_inc'] === NULL && !$field['nullable']
+							&& $field['pdo_type']==\PDO::PARAM_INT)
+				))
 					$inc=$key;
 				unset($field);
 			}
 		foreach ($this->fields as $key=>&$field) {
 			if ($field['pkey']) {
 				$field['previous']=$field['value'];
-				if (!$inc && $field['pdo_type']==\PDO::PARAM_INT &&
-					empty($field['value']) && !$field['nullable'] &&
-					is_null($field['default']))
+				if (!$inc && empty($field['value']) &&
+					($field['auto_inc'] === TRUE || ($field['auto_inc'] === NULL
+						&& $field['pdo_type']==\PDO::PARAM_INT && !$field['nullable']))
+				)
 					$inc=$key;
 				$filter.=($filter?' AND ':'').$this->db->quotekey($key).'=?';
 				$nkeys[$nctr+1]=[$field['value'],$field['pdo_type']];
-				$nctr++;
+				++$nctr;
 			}
 			if ($field['changed'] && $key!=$inc) {
 				$fields.=($actr?',':'').$this->db->quotekey($key);
 				$values.=($actr?',':'').'?';
 				$args[$actr+1]=[$field['value'],$field['pdo_type']];
-				$actr++;
+				++$actr;
 				$ckeys[]=$key;
 			}
 			unset($field);
@@ -617,7 +623,7 @@ function erase($filter=NULL,$quick=TRUE) {
 				$filter.=($filter?' AND ':'').$this->db->quotekey($key).'=?';
 				$args[$ctr+1]=[$field['previous'],$field['pdo_type']];
 				$pkeys[$key]=$field['previous'];
-				$ctr++;
+				++$ctr;
 			}
 			$field['value']=NULL;
 			$field['changed']=(bool)$field['default'];
diff --git a/lib/image.php b/lib/image.php
index 59c165eb7..b7f149ced 100644
--- a/lib/image.php
+++ b/lib/image.php
@@ -367,15 +367,15 @@ function identicon($str,$size=64,$blocks=4) {
 		imagefill($this->data,0,0,IMG_COLOR_TRANSPARENT);
 		$ctr=count($sprites);
 		$dim=$blocks*floor($size/$blocks)*2/$blocks;
-		for ($j=0,$y=ceil($blocks/2);$j<$y;$j++)
-			for ($i=$j,$x=$blocks-1-$j;$i<$x;$i++) {
+		for ($j=0,$y=ceil($blocks/2);$j<$y;++$j)
+			for ($i=$j,$x=$blocks-1-$j;$i<$x;++$i) {
 				$sprite=imagecreatetruecolor($dim,$dim);
 				imagefill($sprite,0,0,IMG_COLOR_TRANSPARENT);
 				$block=$sprites[hexdec($hash[($j*$blocks+$i)*2])%$ctr];
-				for ($k=0,$pts=count($block);$k<$pts;$k++)
+				for ($k=0,$pts=count($block);$k<$pts;++$k)
 					$block[$k]*=$dim;
 				imagefilledpolygon($sprite,$block,$pts/2,$fg);
-				for ($k=0;$k<4;$k++) {
+				for ($k=0;$k<4;++$k) {
 					imagecopyresampled($this->data,$sprite,
 						$i*$dim/2,$j*$dim/2,0,0,$dim/2,$dim/2,$dim,$dim);
 					$this->data=imagerotate($this->data,90,
@@ -416,7 +416,7 @@ function captcha($font,$size=24,$len=5,
 					-$len));
 				$block=$size*3;
 				$tmp=[];
-				for ($i=0,$width=0,$height=0;$i<$len;$i++) {
+				for ($i=0,$width=0,$height=0;$i<$len;++$i) {
 					// Process at 2x magnification
 					$box=imagettfbbox($size*2,0,$path,$seed[$i]);
 					$w=$box[2]-$box[0];
@@ -440,7 +440,7 @@ function captcha($font,$size=24,$len=5,
 				}
 				$this->data=imagecreatetruecolor($width,$height);
 				imagefill($this->data,0,0,IMG_COLOR_TRANSPARENT);
-				for ($i=0;$i<$len;$i++) {
+				for ($i=0;$i<$len;++$i) {
 					imagecopy($this->data,$tmp[$i],
 						$i*$block/2,($height-imagesy($tmp[$i]))/2,0,0,
 						imagesx($tmp[$i]),imagesy($tmp[$i]));
@@ -520,7 +520,7 @@ function save() {
 		if ($this->flag) {
 			if (!is_dir($dir=$fw->TEMP))
 				mkdir($dir,Base::MODE,TRUE);
-			$this->count++;
+			++$this->count;
 			$fw->write($dir.'/'.$fw->SEED.'.'.
 				$fw->hash($this->file).'-'.$this->count.'.png',
 				$this->dump());
diff --git a/lib/markdown.php b/lib/markdown.php
index 885f21582..4be4c5611 100644
--- a/lib/markdown.php
+++ b/lib/markdown.php
@@ -224,7 +224,7 @@ protected function _li($str) {
 		$type='ul';
 		// Main loop
 		while ($ptr<$len) {
-			if (preg_match('/^\h*[*-](?:\h?[*-]){2,}(?:\n+|$)/',
+			if (preg_match('/^\h*[*\-](?:\h?[*\-]){2,}(?:\n+|$)/',
 				substr($str,$ptr),$match)) {
 				$ptr+=strlen($match[0]);
 				// Embedded horizontal rule
@@ -232,7 +232,7 @@ protected function _li($str) {
 					('<'.$type.'>'."\n".$dst.'</'.$type.'>'."\n\n"):'').
 					'<hr />'."\n\n".$this->build(substr($str,$ptr));
 			}
-			elseif (preg_match('/(?<=^|\n)([*+-]|\d+\.)\h'.
+			elseif (preg_match('/(?<=^|\n)([*+\-]|\d+\.)\h'.
 				'(.+?(?:\n+|$))((?:(?: {4}|\t)+.+?(?:\n+|$))*)/s',
 				substr($str,$ptr),$match)) {
 				$match[3]=preg_replace('/(?<=^|\n)(?: {4}|\t)/','',$match[3]);
@@ -466,10 +466,10 @@ protected function build($str) {
 				'pre'=>'/^(?:(?: {4}|\t).+?(?:\n+|$))+/',
 				'fence'=>'/^`{3}\h*(\w+)?.*?[^\n]*\n+(.+?)`{3}[^\n]*'.
 					'(?:\n+|$)/s',
-				'hr'=>'/^\h*[*_-](?:\h?[\*_-]){2,}\h*(?:\n+|$)/',
+				'hr'=>'/^\h*[*_\-](?:\h?[\*_\-]){2,}\h*(?:\n+|$)/',
 				'atx'=>'/^\h*(#{1,6})\h?(.+?)\h*(?:#.*)?(?:\n+|$)/',
-				'setext'=>'/^\h*(.+?)\h*\n([=-])+\h*(?:\n+|$)/',
-				'li'=>'/^(?:(?:[*+-]|\d+\.)\h.+?(?:\n+|$)'.
+				'setext'=>'/^\h*(.+?)\h*\n([=\-])+\h*(?:\n+|$)/',
+				'li'=>'/^(?:(?:[*+\-]|\d+\.)\h.+?(?:\n+|$)'.
 					'(?:(?: {4}|\t)+.+?(?:\n+|$))*)+/s',
 				'raw'=>'/^((?:<!--.+?-->|'.
 					'<(address|article|aside|audio|blockquote|canvas|dd|'.
diff --git a/lib/matrix.php b/lib/matrix.php
index d1f00877f..6c22bae21 100644
--- a/lib/matrix.php
+++ b/lib/matrix.php
@@ -130,7 +130,7 @@ function calendar($date='now',$first=0) {
 			$days=cal_days_in_month(CAL_GREGORIAN,$parts['mon'],$parts['year']);
 			$ref=date('w',strtotime(date('Y-m',$parts[0]).'-01'))+(7-$first)%7;
 			$out=[];
-			for ($i=0;$i<$days;$i++)
+			for ($i=0;$i<$days;++$i)
 				$out[floor(($ref+$i)/7)][($ref+$i)%7]=$i+1;
 		}
 		return $out;
diff --git a/lib/smtp.php b/lib/smtp.php
index 415a13991..8cef93932 100644
--- a/lib/smtp.php
+++ b/lib/smtp.php
@@ -27,7 +27,8 @@ class SMTP extends Magic {
 	const
 		E_Header='%s: header is required',
 		E_Blank='Message must not be blank',
-		E_Attach='Attachment %s not found';
+		E_Attach='Attachment %s not found',
+		E_DIALOG='SMTP dialog error: %s';
 	//@}
 
 	protected
@@ -59,7 +60,7 @@ class SMTP extends Magic {
 	**/
 	protected function fixheader($key) {
 		return str_replace(' ','-',
-			ucwords(preg_replace('/[_-]/',' ',strtolower($key))));
+			ucwords(preg_replace('/[_\-]/',' ',strtolower($key))));
 	}
 
 	/**
@@ -157,6 +158,8 @@ protected function dialog($cmd=NULL,$log=TRUE,$mock=FALSE) {
 				$this->log.=$cmd."\n";
 			$this->log.=str_replace("\r",'',$reply);
 		}
+		if (preg_match('/^(4|5)\d{2}\s.*$/', $reply))
+			user_error(sprintf(self::E_DIALOG,$reply),E_USER_ERROR);
 		return $reply;
 	}
 
diff --git a/lib/template.php b/lib/template.php
index 6d920c5cf..fb6f21dd6 100644
--- a/lib/template.php
+++ b/lib/template.php
@@ -273,7 +273,7 @@ function parse($text) {
 		// Build tree structure
 		for ($ptr=0,$w=5,$len=strlen($text),$tree=[],$tmp='';$ptr<$len;)
 			if (preg_match('/^(.{0,'.$w.'}?)<(\/?)(?:F3:)?'.
-				'('.$this->tags.')\b((?:\s+[\w.:@!-]+'.
+				'('.$this->tags.')\b((?:\s+[\w.:@!\-]+'.
 				'(?:\h*=\h*(?:"(?:.*?)"|\'(?:.*?)\'))?|'.
 				'\h*\{\{.+?\}\})*)\h*(\/?)>/is',
 				substr($text,$ptr),$match)) {
@@ -283,7 +283,7 @@ function parse($text) {
 				if ($match[2]) {
 					// Find matching start tag
 					$stack=[];
-					for($i=count($tree)-1;$i>=0;$i--) {
+					for($i=count($tree)-1;$i>=0;--$i) {
 						$item=$tree[$i];
 						if (is_array($item) &&
 							array_key_exists($match[3],$item) &&
@@ -326,7 +326,7 @@ function parse($text) {
 				$tmp.=substr($text,$ptr,$w);
 				$ptr+=$w;
 				if ($w<50)
-					$w++;
+					++$w;
 			}
 		if (strlen($tmp))
 			// Append trailing text
diff --git a/lib/web.php b/lib/web.php
index 05aecac72..7a69051d1 100644
--- a/lib/web.php
+++ b/lib/web.php
@@ -230,7 +230,7 @@ function send($file,$mime=NULL,$kbps=0,$force=TRUE,$name=NULL,$flush=TRUE) {
 				!$info['timed_out'] && !connection_aborted()) {
 				if ($kbps) {
 					// Throttle output
-					$ctr++;
+					++$ctr;
 					if ($ctr/$kbps>$elapsed=microtime(TRUE)-$start)
 						usleep(1e6*($ctr/$kbps-$elapsed));
 				}
@@ -385,7 +385,7 @@ function($curl,$line) use(&$headers) {
 			$options['follow_location'] && $open_basedir &&
 			preg_grep('/HTTP\/[\d.]{1,3} 3\d{2}/',$headers) &&
 			preg_match('/^Location: (.+)$/m',implode(PHP_EOL,$headers),$loc)) {
-			$options['max_redirects']--;
+			--$options['max_redirects'];
 			if($loc[1][0] == '/') {
 				$parts=parse_url($url);
 				$loc[1]=$parts['scheme'].'://'.$parts['host'].
@@ -533,7 +533,7 @@ protected function _socket($url,$options) {
 				preg_grep('/HTTP\/[\d.]{1,3} 3\d{2}/',$headers) &&
 				preg_match('/Location: (.+?)'.preg_quote($eol).'/',
 				$html[0],$loc)) {
-				$options['max_redirects']--;
+				--$options['max_redirects'];
 				return $this->request($loc[1],$options);
 			}
 		}
@@ -743,7 +743,7 @@ function minify($files,$mime=NULL,$header=TRUE,$path=NULL) {
 									// Presume it's a regex pattern
 									$regex=TRUE;
 									// Backtrack and validate
-									for ($ofs=$ptr;$ofs;$ofs--) {
+									for ($ofs=$ptr;$ofs;--$ofs) {
 										// Pattern should be preceded by
 										// open parenthesis, colon,
 										// object property or operator
@@ -751,13 +751,13 @@ function minify($files,$mime=NULL,$header=TRUE,$path=NULL) {
 											'/(return|[(:=!+\-*&|])$/',
 											substr($src,0,$ofs))) {
 											$data.='/';
-											$ptr++;
+											++$ptr;
 											while ($ptr<$len) {
 												$data.=$src[$ptr];
-												$ptr++;
+												++$ptr;
 												if ($src[$ptr-1]=='\\') {
 													$data.=$src[$ptr];
-													$ptr++;
+													++$ptr;
 												}
 												elseif ($src[$ptr-1]=='/')
 													break;
@@ -773,7 +773,7 @@ function minify($files,$mime=NULL,$header=TRUE,$path=NULL) {
 									if (!$regex) {
 										// Division operator
 										$data.=$src[$ptr];
-										$ptr++;
+										++$ptr;
 									}
 								}
 								continue;
@@ -781,14 +781,14 @@ function minify($files,$mime=NULL,$header=TRUE,$path=NULL) {
 							if (in_array($src[$ptr],['\'','"','`'])) {
 								$match=$src[$ptr];
 								$data.=$match;
-								$ptr++;
+								++$ptr;
 								// String literal
 								while ($ptr<$len) {
 									$data.=$src[$ptr];
-									$ptr++;
+									++$ptr;
 									if ($src[$ptr-1]=='\\') {
 										$data.=$src[$ptr];
-										$ptr++;
+										++$ptr;
 									}
 									elseif ($src[$ptr-1]==$match)
 										break;
@@ -804,11 +804,11 @@ function minify($files,$mime=NULL,$header=TRUE,$path=NULL) {
 									($ext[0]=='css' && $ptr+2<strlen($src) &&
 									preg_match('/:\w/',substr($src,$ptr+1,2))))
 									$data.=' ';
-								$ptr++;
+								++$ptr;
 								continue;
 							}
 							$data.=$src[$ptr];
-							$ptr++;
+							++$ptr;
 						}
 						if ($ext[0]=='css')
 							$data=str_replace(';}','}',$data);
@@ -842,7 +842,7 @@ function rss($url,$max=10,$tags=NULL) {
 		if (isset($xml->channel)) {
 			$out['source']=(string)$xml->channel->title;
 			$max=min($max,count($xml->channel->item));
-			for ($i=0;$i<$max;$i++) {
+			for ($i=0;$i<$max;++$i) {
 				$item=$xml->channel->item[$i];
 				$list=[''=>NULL]+$item->getnamespaces(TRUE);
 				$fields=[];
@@ -984,7 +984,7 @@ function filler($count=1,$max=20,$std=TRUE) {
 			'repudiandae rerum saepe sapiente sequi similique sint soluta '.
 			'suscipit tempora tenetur totam ut ullam unde vel veniam vero '.
 			'vitae voluptas');
-		for ($i=0,$add=$count-(int)$std;$i<$add;$i++) {
+		for ($i=0,$add=$count-(int)$std;$i<$add;++$i) {
 			shuffle($rnd);
 			$words=array_slice($rnd,0,mt_rand(3,$max));
 			$out.=(!$std&&$i==0?'':' ').ucfirst(implode(' ',$words)).'.';
diff --git a/lib/web/oauth2.php b/lib/web/oauth2.php
index 7a04602cb..eda6e45f1 100644
--- a/lib/web/oauth2.php
+++ b/lib/web/oauth2.php
@@ -44,10 +44,10 @@ function uri($endpoint,$query=TRUE) {
 
 	/**
 	*	Send request to API/token endpoint
-	*	@return string|FALSE
+	*	@return string|array|FALSE
 	*	@param $uri string
 	*	@param $method string
-	*	@param $token array
+	*	@param $token string
 	**/
 	function request($uri,$method,$token=NULL) {
 		$web=\Web::instance();
diff --git a/lib/web/openid.php b/lib/web/openid.php
index c940af32c..6e84b6122 100644
--- a/lib/web/openid.php
+++ b/lib/web/openid.php
@@ -103,7 +103,7 @@ protected function discover($proxy) {
 					$ptr+=strlen($parts[0]);
 				}
 				else
-					$ptr++;
+					++$ptr;
 		}
 		// Get OpenID provider's endpoint URL
 		if (isset($this->args['provider'])) {