Very useful PHP database class_PHP tutorial

Copy code The code is as follows:

//Very easy to use PHP database class, three or four lines of code can handle the operation of a table, no matter how complex the table fields are.
//This type of method has been widely used in the development of large-scale website programs many times, and the effect is particularly good.
//作者：快刀浪子＋＋　
define("_PHP_RECORD_","exists");
class TRecord
{
var $db;
var $rc;
var $name;
var $value;
var $num;
var $buffer;　　 //查询结果　调用方法　$buffer[$i]["fields"];
var $seekstr;　　 //保存查询条件用
function TRecord($host="localhost",$user="root",$passwd="")
{global $HTTP_POST_VARS;
$this->num=0;
$this->host=$host;
$this->user=$user;
$this->passwd=$passwd;
if(($this->db=mysql_connect($host,$user,$passwd))==false)
exit("联结数据库出错!");
　　while(list($this->name[$this->num],$this->value[$this->num])=each($HTTP_POST_VARS))
{$this->num++;
}
//////////////
for($i=0;$i<$this->num;$i++)
{$this->value[$i]=$this->SafeString($this->value[$i]);
}
//
}
function SafeString($message)
{$message=str_replace(" "," ",$message);
$message=str_replace("<","<",$message);
$message=str_replace(">",">",$message);
//$message=str_replace("｜","｜",$message);
//$message=str_replace("\"",""",$message);
//$message=nl2br($message);
return $message;
}
//////
function reset()
{$this->num=0;
$this->name=array();
　　 $this->value=array();
}
function add($name,$values)
{$this->name[$this->num]=$name;
　　 $this->value[$this->num]=$values;
$this->num++;
}
function unadd($name)
{$j=0;
for($i=0;$i<$this->num;$i++)
{if($this->name[$i]!=$name)
{$aaa[$j]=$this->name[$i];
$bbb[$j]=$this->value[$i];
$j++;
}
}
$this->name=$aaa;
$this->value=$bbb;
$this->num=$j;
}
function InsertRecord($database,$table)
{mysql_select_db($database);
if($this->num==0)
exit("没有定义变量！");
$field=implode(",",$this->name);
for($i=0;$i<$this->num;$i++)
{if(is_string($this->value[$i]))
$ls[$i]="'".$this->value[$i]."'";
　else
$ls[$i]=$this->value[$i];
　　　　　$value=implode(",",$ls); 　
}
$sql=sprintf("insert into %s(%s) values(%s)",$table,$field,$value);
if(mysql_query($sql,$this->db)==false)
{echo "写数据到数据库时出错：".$sql;
exit();
}
}
function SelectRecord($database,$table) //返回记录数，结果在缓冲区中
{mysql_select_db($database);
　　　　if($this->num==0)
$sql=sprintf("select * from %s",$table);
　else
{
for($i=0;$i<$this->num;$i++)
{if(is_string($this->value[$i]))
$ls[$i]="'".$this->value[$i]."'";
　　　else
$ls[$i]=$this->value[$i];
$str[$i]=sprintf("%s=%s",$this->name[$i],$ls[$i]);
}
$string=implode(" and ",$str);
$this->seekstr=$string;
$sql=sprintf("select * from %s where %s",$table,$string);
}
if(($rc=mysql_query($sql,$this->db))==false)
{echo "查询数据库时出错：".$sql;
exit();
}
$i=0;
while($this->buffer[$i]=mysql_fetch_array($rc))
{
$i++;
}
mysql_free_result($rc);
return $i;
}
function UpdateRecord($database,$table,$limitstr)
{mysql_select_db($database);
if($this->num==0)
exit("没有定义变量！");
for($i=0;$i<$this->num;$i++)
{if(is_string($this->value[$i]))
$ls[$i]="'".$this->value[$i]."'";
　else
$ls[$i]=$this->value[$i];
$upstr[$i]=$this->name[$i]."=".$ls[$i];
}
　　　　$str=implode(",",$upstr);
$sql=sprintf("update %s set %s where %s",$table,$str,$limitstr);
if(mysql_query($sql,$this->db)==false)
{echo "修改数据时出错：".$sql;
exit();
}
}
function addtip($database,$table,$fileds,$limitstr="")
{//必须为整型字段　
mysql_select_db($database);
if($limitstr!="")
$sql=sprintf("update %s set %s=%s+1 where %s",$table,$fileds,$fileds,$limitstr);
　else
$sql=sprintf("update %s set %s=%s+1",$table,$fileds,$fileds);
if(mysql_query($sql,$this->db)==false)
{echo "修改数据时出错：".$sql;
exit();
}
}
function unaddtip($database,$table,$fileds,$limitstr="")
{
mysql_select_db($database);
if($limitstr!="")
$sql=sprintf("update %s set %s=%s-1 where %s",$table,$fileds,$fileds,$limitstr);
　else
$sql=sprintf("update %s set %s=%s-1",$table,$fileds,$fileds);
if(mysql_query($sql,$this->db)==false)
{echo "修改数据时出错：".$sql;
exit();
}
}
function isempty($var,$china)
{if(trim($var)=="")
{
$reason="没有录入“".$china."”!";
exit($reason);
}
}
function GetResult()
{return $this->buffer;
}
function close()
{
mysql_close($this->db);
}
}
?>

http://www.bkjia.com/PHPjc/320085.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/320085.htmlTechArticle复制代码 代码如下: ? //很好用的PHP数据库类，三、四句代码搞定一个表的操作，无论这个表字段有多复杂。 //此类多次大量用在大型网站程...