PHP + mysql query

1. PHP + mysql query
   
   • $link = mysql_connect(ipAddress, userName, password);
   • mysql_select_db(DBName, $link); ========>第一步和第二部等于 mysql_connect(ipAddr, userName, password, DBName);
     
   • $result = mysql_query(SQL, $link);
   • while($row=mysql_fetch_row($result)) $row[0];
   • mysql_free_result($result);
   
   
2. method 2::
   

   • $db = new mysqli(addr, username, password, <dbname>); =====> $db->select_db(dbname);
     
   • $result = $db->query(sql);
   • $result->num_rows; ====> mysqli_num_rows($result);
   • $row = $result->fetch_assoc(); =======> mysqli_fetch_assoc(); =====> mysql_fetch_row($result)===> $result->fetch_object()==> mysqli_fetch_object($result);
     
   • $result->free()
   • $db->close(); mysqli_close($db);
     

Web中需要处理的字符常用的函数： get_magic_quotes_gpc() addslashes() tripslashes()