diff --git a/upload/install/include/install_function.php b/upload/install/include/install_function.php
index 5c9adab6aadb7eb9c4922ab8935ede75a0a23427..5114570257d6fb29725b7b4df2e8979d95e76fe5 100644
--- a/upload/install/include/install_function.php
+++ b/upload/install/include/install_function.php
@@ -64,9 +64,9 @@ function check_db($dbhost, $dbuser, $dbpw, $dbname, $tablepre) {
 	}
 	$mysqlmode = function_exists('mysql_connect') ? 'mysql' : 'mysqli';
 	$link = ($mysqlmode == 'mysql') ? @mysql_connect($dbhost, $dbuser, $dbpw) : new mysqli($dbhost, $dbuser, $dbpw);
-	if(!$link) {
-		$errno = ($mysqlmode == 'mysql') ? mysql_errno() : mysqli_errno();
-		$error = ($mysqlmode == 'mysql') ? mysql_error() : mysqli_error();
+	if(($mysqlmode == 'mysql' && !$link) || ($mysqlmode != 'mysql' && $link->connect_errno)) {
+		$errno = ($mysqlmode == 'mysql') ? mysql_errno($link) : $link->connect_errno;
+		$error = ($mysqlmode == 'mysql') ? mysql_error($link) : $link->connect_error;
 		if($errno == 1045) {
 			show_msg('database_errno_1045', $error, 0);
 		} elseif($errno == 2003) {
diff --git a/upload/install/index.php b/upload/install/index.php
index 1cb9e7b1434e284b421a81c5289bccc63f23712c..2b575f4c52896ddc21e9b7fc5219193810b7f000 100644
--- a/upload/install/index.php
+++ b/upload/install/index.php
@@ -285,9 +285,9 @@ if($method == 'show_license') {
 		} else {
 			$mysqlmode = function_exists("mysql_connect") ? 'mysql' : 'mysqli';
 			$link = ($mysqlmode == 'mysql') ? @mysql_connect($dbhost, $dbuser, $dbpw) : new mysqli($dbhost, $dbuser, $dbpw);
-			if(!$link) {
-				$errno = ($mysqlmode == 'mysql') ? mysql_errno($link) : $link->errno;
-				$error = ($mysqlmode == 'mysql') ? mysql_error($link) : $link->error;
+			if(($mysqlmode == 'mysql' && !$link) || ($mysqlmode != 'mysql' && $link->connect_errno)) {
+				$errno = ($mysqlmode == 'mysql') ? mysql_errno($link) : $link->connect_errno;
+				$error = ($mysqlmode == 'mysql') ? mysql_error($link) : $link->connect_error;
 				if($errno == 1045) {
 					show_msg('database_errno_1045', $error, 0);
 				} elseif($errno == 2003) {
diff --git a/upload/uc_server/install/func.inc.php b/upload/uc_server/install/func.inc.php
index 24204f578a1914885eafcde625a30f1817e60a6c..dfd8aa7c50141329d8fd9dd3d872480d97aa81de 100644
--- a/upload/uc_server/install/func.inc.php
+++ b/upload/uc_server/install/func.inc.php
@@ -64,9 +64,9 @@ function check_db($dbhost, $dbuser, $dbpw, $dbname, $tablepre) {
 	}
 	$mysqlmode = function_exists('mysql_connect') ? 'mysql' : 'mysqli';
 	$link = ($mysqlmode == 'mysql') ? @mysql_connect($dbhost, $dbuser, $dbpw) : new mysqli($dbhost, $dbuser, $dbpw);
-	if(!$link) {
-		$errno = ($mysqlmode == 'mysql') ? mysql_errno() : mysqli_errno();
-		$error = ($mysqlmode == 'mysql') ? mysql_error() : mysqli_error();
+	if(($mysqlmode == 'mysql' && !$link) || ($mysqlmode != 'mysql' && $link->connect_errno)) {
+		$errno = ($mysqlmode == 'mysql') ? mysql_errno($link) : $link->connect_errno;
+		$error = ($mysqlmode == 'mysql') ? mysql_error($link) : $link->connect_error;
 		if($errno == 1045) {
 			show_msg('database_errno_1045', $error, 0);
 		} elseif($errno == 2003) {