addslashes not worked in php

i have problem with addslashes and stripslashes.

i have added data like this:

$data['sender_name']= addslashes($_POST['sender_name']);
$data['sender_email']= $_POST['sender_email'];
$id=insert('delivery',$data);
function insert($table=NULL,$fields=NULL)
        {
            if($table && isset($table) && $fields && isset($fields))
            {
                $sql="INSERT INTO $table(";
                foreach($fields as $key=>$value)
                {
                    $sql.="$key,";
                }
                $sql=(substr($sql,0,strlen($sql)-1));
       开发者_运维问答         $sql.=") VALUES (";
                foreach($fields as $key=>$value)
                {
                    if(is_string($value))
                        $sql.="'".$value."',";
                    else
                        $sql.="$value,";
                }
                $sql=(substr($sql,0,strlen($sql)-1));
                $sql.=")";
                $flag=0;
                self::openConnection();
                mysql_query($sql,self::$connection);
                $flag=mysql_insert_id();
                self::closeConnection();
                return $flag;

            }
        }

it's enter the data in database but without add slashes.

magic_quotes_gpc is off.

instead of addslashes use mysql_real_escape_string

http://php.net/manual/en/function.mysql-real-escape-string.php