php优化

 0){ $result = true; }else{ $result = false; } //check password end break; case 'isuser': list($username, $server) = $toks; //check password begin $conn=mysql_connect($servername, $serverusername, $serverpassword); mysql_query("set names 'utf8'"); if(!$conn){ die("could not connect to the database"); } $db_select=mysql_select_db($database);//选择数据库 if(!$db_select) { die("could not to the database"); } $query="select * from $usertable where $userfield = '$username'";//构建查询语句 $result=mysql_query($query);//执行查询 $count=mysql_numrows($result);//取得条数 mysql_close($conn); if($count > 0){ $result = true; }else{ $result = false; } //check password end break; default: $result = false; } $message = @pack("nn", 2, $result); fwrite($stdout, $message); $dump = @unpack("nn", $message); $dump = $dump["n"]; fwrite($fs, $dump . "\n"); flush();} while(true);