diff --git a/ext/odbc/php_odbc.c b/ext/odbc/php_odbc.c
index 3a821a35ea38c..5e0945e0a43de 100644
--- a/ext/odbc/php_odbc.c
+++ b/ext/odbc/php_odbc.c
@@ -2246,7 +2246,20 @@ void odbc_do_connect(INTERNAL_FUNCTION_PARAMETERS, int persistent)
 				RETCODE ret;
 				UCHAR d_name[32];
 				SQLSMALLINT len;
+				SQLUINTEGER dead = SQL_CD_FALSE;
 
+				ret = SQLGetConnectAttr(db_conn->hdbc,
+					SQL_ATTR_CONNECTION_DEAD,
+					&dead, 0, NULL);
+				if (ret == SQL_SUCCESS && dead == SQL_CD_TRUE) {
+					/* Bail early here, since we know it's gone */
+					zend_hash_str_del(&EG(persistent_list), hashed_details, hashed_len);
+					goto try_and_get_another_connection;
+				}
+				/* If the driver doesn't support it, or returns
+				 * false (could be a false positive), fall back
+				 * to the old heuristic.
+				 */
 				ret = SQLGetInfo(db_conn->hdbc,
 					SQL_DATA_SOURCE_READ_ONLY,
 					d_name, sizeof(d_name), &len);
diff --git a/ext/pdo_odbc/odbc_driver.c b/ext/pdo_odbc/odbc_driver.c
index 308cf7e10c94d..661cab3c04f8c 100644
--- a/ext/pdo_odbc/odbc_driver.c
+++ b/ext/pdo_odbc/odbc_driver.c
@@ -396,11 +396,19 @@ static zend_result odbc_handle_check_liveness(pdo_dbh_t *dbh)
 	RETCODE ret;
 	UCHAR d_name[32];
 	SQLSMALLINT len;
+	SQLUINTEGER dead = SQL_CD_FALSE;
 	pdo_odbc_db_handle *H = (pdo_odbc_db_handle *)dbh->driver_data;
 
+	ret = SQLGetConnectAttr(H->dbc, SQL_ATTR_CONNECTION_DEAD, &dead, 0, NULL);
+	if (ret == SQL_SUCCESS && dead == SQL_CD_TRUE) {
+		/* Bail early here, since we know it's gone */
+		return FAILURE;
+	}
 	/*
-	 * SQL_ATTR_CONNECTION_DEAD is tempting, but only in ODBC 3.5,
-	 * and not all drivers implement it properly
+	 * If the driver doesn't support SQL_ATTR_CONNECTION_DEAD, or if
+	 * it returns false (which could be a false positive), fall back
+	 * to using SQL_DATA_SOURCE_READ_ONLY, which isn't semantically
+	 * correct, but works with many drivers.
 	 */
 	ret = SQLGetInfo(H->dbc, SQL_DATA_SOURCE_READ_ONLY, d_name,
 		sizeof(d_name), &len);