add database auto reconnect for server has gone away error

app/vendor/Eco/System/Database/Connection.php

@@ -206,10 +206,11 @@ public function isSelectQuery($query)
 	 * @param string $query
 	 * @param mixed $params
 	 * @param int $return_type
+	 * @param boolean $is_reconnect
 	 * @return mixed
 	 * @throws \PDOException (query fail)
 	 */
-	public function query($query, $params = null, $return_type = null)
+	public function query($query, $params = null, $return_type = null, $is_reconnect = false)
 	{
 		System::db()->connectionReset(); // reset to default ID
 
@@ -227,23 +228,37 @@ public function query($query, $params = null, $return_type = null)
 
 		$this->__logQuery($query, $params);
 
-		$sh = $this->getPdo()->prepare($query);
-		if($sh->execute( is_array($params) ? $params : null ))
+		try
 		{
-			// determine return type
-			if($return_type === self::QUERY_RETURN_TYPE_ROWS)
+			$sh = $this->getPdo()->prepare($query);
+			if(@$sh->execute( is_array($params) ? $params : null ))
 			{
-				return $sh->fetchAll(\PDO::FETCH_CLASS);
+				// determine return type
+				if($return_type === self::QUERY_RETURN_TYPE_ROWS)
+				{
+					return $sh->fetchAll(\PDO::FETCH_CLASS);
+				}
+				else if(( $return_type !== null && $return_type === self::QUERY_RETURN_TYPE_AFFECTED )
+					|| preg_match('/^\s*(delete|insert|replace|update)/i', $query))
+				{
+					return $sh->rowCount();
+				}
+				else // other
+				{
+					return true;
+				}
 			}
-			else if(( $return_type !== null && $return_type === self::QUERY_RETURN_TYPE_AFFECTED )
-				|| preg_match('/^\s*(delete|insert|replace|update)/i', $query))
-			{
-				return $sh->rowCount();
-			}
-			else // other
+		}
+		catch(\PDOException $ex) // catch exception for server has gone away error
+		{
+			// auto handle server has gone away error, do not handle if multiple reconnect
+			if(strpos($ex->getMessage(), 'server has gone away') !== false && !$is_reconnect)
 			{
-				return true;
+				$this->close(); // close for auto reconnect
+				return $this->query($query, $params, $return_type, true); // try again
 			}
+
+			throw $ex; // not handled
 		}
 
 		return false;

app/vendor/Eco/version.php

@@ -11,4 +11,4 @@
 /**
  * Eco version
  */
-const ECO_VERSION = '1.2.7';
+const ECO_VERSION = '1.2.8';

docs/database.md

@@ -50,6 +50,7 @@ When another connection is used (that is not the default connection) the connect
 ```php
 db('remote')->count('table');
 ```
+> The database connection object `Eco\System\Database\Connection` will automatically reconnect to the database server when a `server has gone away` error is thrown - it will only try to reconnect once per query.
 
 
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