update () should return -1 in case if failed

Author: avbdr

MysqliDb.php

@@ -317,8 +317,11 @@ public function update($tableName, $tableData)
         $this->_query = "UPDATE " . self::$_prefix . $tableName ." SET ";
 
         $stmt = $this->_buildQuery(null, $tableData);
-        $stmt->execute();
-        $this->_stmtError = $stmt->error;
+        if ($stmt->execute() == false) {
+            $this->reset();
+            $this->_stmtError = $stmt->error;
+            return -1;
+        }
         $this->reset();
 
         return ($stmt->affected_rows > 0);
@@ -741,7 +744,6 @@ protected function _dynamicBindResults(mysqli_stmt $stmt)
         // https://github.com/joshcam/PHP-MySQLi-Database-Class/pull/119
         if (version_compare (phpversion(), '5.4', '<'))
              $stmt->store_result();
-        }
 
         call_user_func_array(array($stmt, 'bind_result'), $parameters);
 

readme.md

@@ -82,7 +82,10 @@ $data = Array (
 );
 $db->where ('id', 1);
 $cols = $db->update ('users', $data);
-echo $cols . ' records were updated';
+if ($cols == -1)
+    echo 'update failed: ' . $db->getLastError();
+else
+    echo $cols . ' records were updated';
 ```
 Note that update query will return 0 in case update query will fail AND also in case
 where no records were modified.