Disconnect on not connected driver not fail (#222)

Sometimes database go away and Connection::isConnected() is returning TRUE. Prevent this should be posibble to disconnect on closed connection without error.

src/Dibi/Drivers/FirebirdDriver.php

@@ -96,7 +96,7 @@ class FirebirdDriver implements Dibi\Driver, Dibi\ResultDriver, Dibi\Reflector
 	 */
 	public function disconnect()
 	{
-		ibase_close($this->connection);
+		@ibase_close($this->connection); // @ - connection can be already disconnected
 	}
 
 

src/Dibi/Drivers/MsSqlDriver.php

@@ -78,7 +78,7 @@ class MsSqlDriver implements Dibi\Driver, Dibi\ResultDriver
 	 */
 	public function disconnect()
 	{
-		mssql_close($this->connection);
+		@mssql_close($this->connection); // @ - connection can be already disconnected
 	}
 
 

src/Dibi/Drivers/MySqlDriver.php

@@ -139,7 +139,7 @@ class MySqlDriver implements Dibi\Driver, Dibi\ResultDriver
 	 */
 	public function disconnect()
 	{
-		mysql_close($this->connection);
+		@mysql_close($this->connection); // @ - connection can be already disconnected
 	}
 
 

src/Dibi/Drivers/MySqliDriver.php

@@ -138,7 +138,7 @@ class MySqliDriver implements Dibi\Driver, Dibi\ResultDriver
 	 */
 	public function disconnect()
 	{
-		mysqli_close($this->connection);
+		@mysqli_close($this->connection); // @ - connection can be already disconnected
 	}
 
 

src/Dibi/Drivers/OdbcDriver.php

@@ -88,7 +88,7 @@ class OdbcDriver implements Dibi\Driver, Dibi\ResultDriver, Dibi\Reflector
 	 */
 	public function disconnect()
 	{
-		odbc_close($this->connection);
+		@odbc_close($this->connection); // @ - connection can be already disconnected
 	}
 
 

src/Dibi/Drivers/OracleDriver.php

@@ -95,7 +95,7 @@ class OracleDriver implements Dibi\Driver, Dibi\ResultDriver, Dibi\Reflector
 	 */
 	public function disconnect()
 	{
-		oci_close($this->connection);
+		@oci_close($this->connection); // @ - connection can be already disconnected
 	}
 
 

src/Dibi/Drivers/PostgreDriver.php

@@ -111,7 +111,7 @@ class PostgreDriver implements Dibi\Driver, Dibi\ResultDriver, Dibi\Reflector
 	 */
 	public function disconnect()
 	{
-		pg_close($this->connection);
+		@pg_close($this->connection); // @ - connection can be already disconnected
 	}
 
 

src/Dibi/Drivers/SqlsrvDriver.php

@@ -99,7 +99,7 @@ class SqlsrvDriver implements Dibi\Driver, Dibi\ResultDriver
 	 */
 	public function disconnect()
 	{
-		sqlsrv_close($this->connection);
+		@sqlsrv_close($this->connection); // @ - connection can be already disconnected
 	}
 
 

tests/dibi/Connection.connect.phpt

@@ -36,3 +36,15 @@ test(function () use ($config) { // query string
 	Assert::same($config['driver'], $conn->getConfig('driver'));
 	Assert::type('Dibi\Driver', $conn->getDriver());
 });
+
+
+test(function () use ($config) {
+	$conn = new Connection($config);
+	Assert::true($conn->isConnected());
+
+	$conn->disconnect();
+	Assert::false($conn->isConnected());
+
+	$conn->disconnect();
+	Assert::false($conn->isConnected());
+});