diff --git a/include/dbstructure.php b/include/dbstructure.php
index be1158eabe..50c2856ab6 100644
--- a/include/dbstructure.php
+++ b/include/dbstructure.php
@@ -26,7 +26,6 @@ function update_fail($update_id, $error_message){
 	}
 
 	// every admin could had different language
-
 	foreach ($adminlist as $admin) {
 		$lang = (($admin['language'])?$admin['language']:'en');
 		push_lang($lang);
@@ -83,8 +82,9 @@ function table_structure($table) {
 
 	if (dbm::is_result($indexes))
 		foreach ($indexes AS $index) {
-			if ($index["Index_type"] == "FULLTEXT")
+			if ($index["Index_type"] == "FULLTEXT") {
 				continue;
+			}
 
 			if ($index['Key_name'] != 'PRIMARY' && $index['Non_unique'] == '0' && !isset($indexdata[$index["Key_name"]])) {
 				$indexdata[$index["Key_name"]] = array('UNIQUE');
@@ -95,26 +95,31 @@ function table_structure($table) {
 			// To avoid the need to add this to every index definition we just ignore it here.
 			// Exception are primary indexes
 			// Since there are some combindex primary indexes we use the limit of 180 here.
-			if (($index["Sub_part"] != "") AND (($index["Sub_part"] < 180) OR ($index["Key_name"] == "PRIMARY")))
+			if (($index["Sub_part"] != "") AND (($index["Sub_part"] < 180) OR ($index["Key_name"] == "PRIMARY"))) {
 				$column .= "(".$index["Sub_part"].")";
+			}
 
 			$indexdata[$index["Key_name"]][] = $column;
 		}
 
 	if (dbm::is_result($structures)) {
-		foreach($structures AS $field) {
+		foreach ($structures AS $field) {
 			$fielddata[$field["Field"]]["type"] = $field["Type"];
-			if ($field["Null"] == "NO")
+			if ($field["Null"] == "NO") {
 				$fielddata[$field["Field"]]["not null"] = true;
+			}
 
-			if (isset($field["Default"]))
+			if (isset($field["Default"])) {
 				$fielddata[$field["Field"]]["default"] = $field["Default"];
+			}
 
-			if ($field["Extra"] != "")
+			if ($field["Extra"] != "") {
 				$fielddata[$field["Field"]]["extra"] = $field["Extra"];
+			}
 
-			if ($field["Key"] == "PRI")
+			if ($field["Key"] == "PRI") {
 				$fielddata[$field["Field"]]["primary"] = true;
+			}
 		}
 	}
 	return(array("fields"=>$fielddata, "indexes"=>$indexdata));
@@ -138,13 +143,15 @@ function print_structure($database, $charset) {
 function update_structure($verbose, $action, $tables=null, $definition=null) {
 	global $a, $db;
 
-	if ($action)
+	if ($action) {
 		set_config('system', 'maintenance', 1);
+	}
 
-	if (isset($a->config["system"]["db_charset"]))
+	if (isset($a->config["system"]["db_charset"])) {
 		$charset = $a->config["system"]["db_charset"];
-	else
+	} else {
 		$charset = "utf8";
+	}
 
 	$errors = false;
 
@@ -153,8 +160,9 @@ function update_structure($verbose, $action, $tables=null, $definition=null) {
 	// Get the current structure
 	$database = array();
 
-	if (is_null($tables))
-		$tables = q("show tables");
+	if (is_null($tables)) {
+		$tables = q("SHOW TABLES");
+	}
 
 	foreach ($tables AS $table) {
 		$table = current($table);
@@ -164,21 +172,24 @@ function update_structure($verbose, $action, $tables=null, $definition=null) {
 	}
 
 	// Get the definition
-	if (is_null($definition))
+	if (is_null($definition)) {
 		$definition = db_definition($charset);
+	}
 
 	// Ensure index conversion to unique removes duplicates
 	$sql_config = "SET session old_alter_table=1;";
-	if ($verbose)
+	if ($verbose) {
 		echo $sql_config."\n";
-	if ($action)
-		@$db->q($sql_config);
+	}
+	if ($action) {
+		$db->q($sql_config);
+	}
 
 	// MySQL >= 5.7.4 doesn't support the IGNORE keyword in ALTER TABLE statements
 	if ((version_compare($db->server_info(), '5.7.4') >= 0) AND
 		!(strpos($db->server_info(), 'MariaDB') !== false)) {
 		$ignore = '';
-	}else {
+	} else {
 		$ignore = ' IGNORE';
 	}
 
@@ -193,10 +204,12 @@ function update_structure($verbose, $action, $tables=null, $definition=null) {
 			}
 			$is_new_table = True;
 		} else {
-			// Drop the index if it isn't present in the definition
-			// or the definition differ from current status
-			// and index name doesn't start with "local_"
-			foreach ($database[$name]["indexes"] AS $indexname => $fieldnames) {
+			/*
+			 * Drop the index if it isn't present in the definition
+			 * or the definition differ from current status
+			 * and index name doesn't start with "local_"
+			 */
+			foreach ($database[$name]["indexes"] as $indexname => $fieldnames) {
 				$current_index_definition = implode(",",$fieldnames);
 				if (isset($structure["indexes"][$indexname])) {
 					$new_index_definition = implode(",",$structure["indexes"][$indexname]);
@@ -205,39 +218,44 @@ function update_structure($verbose, $action, $tables=null, $definition=null) {
 				}
 				if ($current_index_definition != $new_index_definition && substr($indexname, 0, 6) != 'local_') {
 					$sql2=db_drop_index($indexname);
-					if ($sql3 == "")
+					if ($sql3 == "") {
 						$sql3 = "ALTER".$ignore." TABLE `".$name."` ".$sql2;
-					else
+					} else {
 						$sql3 .= ", ".$sql2;
+					}
 				}
 			}
 			// Compare the field structure field by field
 			foreach ($structure["fields"] AS $fieldname => $parameters) {
 				if (!isset($database[$name]["fields"][$fieldname])) {
 					$sql2=db_add_table_field($fieldname, $parameters);
-					if ($sql3 == "")
+					if ($sql3 == "") {
 						$sql3 = "ALTER TABLE `".$name."` ".$sql2;
-					else
+					} else {
 						$sql3 .= ", ".$sql2;
+					}
 				} else {
 					// Compare the field definition
 					$current_field_definition = implode(",",$database[$name]["fields"][$fieldname]);
 					$new_field_definition = implode(",",$parameters);
 					if ($current_field_definition != $new_field_definition) {
 						$sql2=db_modify_table_field($fieldname, $parameters);
-						if ($sql3 == "")
+						if ($sql3 == "") {
 							$sql3 = "ALTER TABLE `".$name."` ".$sql2;
-						else
+						} else {
 							$sql3 .= ", ".$sql2;
+						}
 					}
 
 				}
 			}
 		}
 
-		// Create the index if the index don't exists in database
-		// or the definition differ from the current status.
-		// Don't create keys if table is new
+		/*
+		 * Create the index if the index don't exists in database
+		 * or the definition differ from the current status.
+		 * Don't create keys if table is new
+		 */
 		if (!$is_new_table) {
 			foreach ($structure["indexes"] AS $indexname => $fieldnames) {
 				if (isset($database[$name]["indexes"][$indexname])) {
@@ -367,10 +385,11 @@ function db_create_index($indexname, $fieldnames, $method="ADD") {
 		if ($names != "")
 			$names .= ",";
 
-		if (preg_match('|(.+)\((\d+)\)|', $fieldname, $matches))
+		if (preg_match('|(.+)\((\d+)\)|', $fieldname, $matches)) {
 			$names .= "`".dbesc($matches[1])."`(".intval($matches[2]).")";
-		else
+		} else {
 			$names .= "`".dbesc($fieldname)."`";
+		}
 	}
 
 	if ($indexname == "PRIMARY") {
@@ -383,8 +402,9 @@ function db_create_index($indexname, $fieldnames, $method="ADD") {
 }
 
 function db_index_suffix($charset, $reduce = 0) {
-	if ($charset != "utf8mb4")
+	if ($charset != "utf8mb4") {
 		return "";
+	}
 
 	// On utf8mb4 indexes can only have a length of 191
 	$indexlength = 191 - $reduce;
@@ -1573,9 +1593,6 @@ function dbstructure_run(&$argv, &$argc) {
 	echo "dumpsql		dump database schema\n";
 	return;
 
-
-
-
 }
 
 if (array_search(__file__,get_included_files())===0){