本文实例讲述了PHP实现的sqlite数据库连接类。分享给大家供大家参考。具体实现方法如下:
该sqlite数据库连接类就是利用了php与sqlite进行连接操作,代码如下:
代码如下:*/
lass db_class {
var $conn=null;
var $querynum = 0;
/**
* 数据库连接,返回数据库连接标识符
*
* @param string $ 数据库服务器主机
* @param string $ 数据库服务器帐号
* @param string $ 数据库服务器密码
* @param string $ 数据库名
* @param bool $ 是否保持持续连接,1为持续连接,0为非持续连接
* @return link_identifier $dbuser, $dbpw, $dbname,
*/
function connect($dbhost, $pconnect = 0) {
$error = '';
$func = $pconnect == 1 ? 'sqlite_popen' : 'sqlite_open';
if (!$this -> conn = $func($dbhost, 0666, $error)) {
$this -> halt($error);
}
return $this -> conn;
}
/**
* 执行sql语句
*
* @param string $ sql语句
* @param string $ 默认为空,可选值为 cache unbuffered
* @param int $ cache以秒为单位的生命周期
* @return resource
*/
function query($sql , $type = '' , $expires = 3600, $dbname = '') {
$error = '';
$func = $type == 'unbuffered' ? 'sqlite_unbuffered_query' : 'sqlite_query';
if (preg_match("/^s*select/i", $sql)) {
$query = $func($this -> conn, $sql, sqlite_assoc, $error);
} else {
$query = sqlite_exec($this -> conn, $sql, $error);
}
if ($error) {
$this -> halt($error, $sql);
}
$this -> querynum++;
return $query;
}
/*
*@param string $ table名
*@param string $ where条件
*@param string $ colum名
*@param string $ limit数量
*/
function getlist($table , $wheres = "1=1", $colums = '*' ,$limits = '3000',$orderbys="id desc") {
$query = $this -> query("select ".$colums." from ".$table." where ".$wheres." order by ".$orderbys." limit ".$limits, $type, $expires, $dbname);
while($rs = $this -> fetch_array($query)){
$datas[]=$rs;
}
//print_r("select ".$colums." from ".$table." where ".$wheres." limit ".$limits);
//print_r($rs);die();
$this -> free_result($query);
return $datas ;
}
function add_one($table , $colums ,$data ) {
//die("insert into ".$table." (".$colums.") values(".$data.")");
$query = $this -> query("insert into ".$table." (".$colums.") values(".$data.")", $type, $expires, $dbname);
//return $this->insert_id();
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