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:
- */
- 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();
- return $query;
- }
- function delist($table , $idarray,$wheres="no") {
- if($wheres=='no')
- $query = $this -> query("delete from ".$table." where id in(".$idarray.")", $type, $expires, $dbname);
- else
- $query = $this -> query("delete from ".$table." where ".$wheres, $type, $expires, $dbname);
- return $query;
- }
- function updatelist($table , $updatedata,$idarray) {
- $query = $this -> query("update ".$table." set ". $updatedata." where id in(".$idarray.")", $type, $expires, $dbname);
- return $query;
- }
- //update max_vote set maxtitle='$title',maxban='$ban',
- /**
- * 执行sql语句,只得到一条记录
- *
- * @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 array
- */
- function get_one($sql, $type = '', $expires = 3600, $dbname = '') {
- $query = $this -> query($sql, $type, $expires, $dbname);
- $rs = $this -> fetch_array($query);
- $this -> free_result($query);
- return $rs ;
- }
- /**
- * 从结果集中取得一行作为关联数组
- *
- * @param resource $ 数据库查询结果资源
- * @param string $ 定义返回类型
- * @return array
- */
- function fetch_array($query, $result_type = sqlite_assoc) {
- return sqlite_fetch_array($query, $result_type);
- }
- /**
- * 取得前一次 sqlite操作所影响的记录行数
- *
- * @return int
- */
- function affected_rows() {
- return sqlite_changes($this -> conn);
- }
- /**
- * 取得结果集中行的数目
- *
- * @return int
- */
- function num_rows($query) {
- return sqlite_num_rows($query);
- }
- /**
- * 返回结果集中字段的数目
- *
- * @return int
- */
- function num_fields($query) {
- return sqlite_num_fields($query);
- }
- /**
- *
- * @return array 备用,一般不用.
- */
- function result($query, $row) {
- return @sqlite_fetch_all($query, sqlite_assoc);
- }
- /**
- * sqlite没有相应函数
- */
- function free_result($query) {
- return ;
- }
- /**
- * 取得上一步 insert 操作产生的 id
- *
- * @return int
- */
- function insert_id() {
- return sqlite_last_insert_rowid($this -> connid);
- }
- /**
- *
- * @return array 只得到数字索引
- */
- function fetch_row($query) {
- return sqlite_fetch_array($query, sqlite_num);
- }
- /**
- */
- function fetch_assoc($query) {
- return $this -> fetch_array($query, sqlite_assoc);
- }
- /**
- *
- * @return string
- */
- function version() {
- return sqlite_libversion();
- }
- function close() {
- return sqlite_close($this -> conn);
- }
- /**
- *
- * @return string
- */
- function error() {
- return sqlite_error_string($this -> errno);
- }
- /**
- *
- * @return int
- */
- function errno() {
- return sqlite_last_error($this -> conn);
- }
- /**
- * 显示mysql教程错误信息
- */
- function halt($message = '', $sql = '') {
- exit("sqlitequery:$sql <br> sqliteerror:" . $this -> error() . " <br> sqliteerrno:" . $this -> errno() . " <br> message:$message");
- } //开源代码Vevb.com
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