PHP - MYSQL - Is it a good practice to use php class as below

• Updates a current row in the database. takes an array of data, where the keys in the array are the column names and the values are the data that will be inserted into those columns. $table is the name of the table and $where is the sql where clause.

In this case, we pass an array of data, table name, and where clause. and foreach loop is called as many times the data array passed. I just wanted to know if it is a good way to update data or insert data. Why I am asking is because in this situation, foreach will execute query for each column separately which will take longer than data inserted using single query.

public function update($data, $table, $where) {
        foreach ($data as $column => $value) {
            $sql = "UPDATE $table SET $column = $value WHERE $where";
            mysql_query($sql) or die(mysql_error());
        }
        return true;
    }