PHP实现的sqlite数据库连接类_PHP

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:

*/ <br />lass db_class { <br />var $conn=null; <br />var $querynum = 0; <br />/** <br /> * 数据库连接，返回数据库连接标识符 <br /> *  <br /> * @param string $ 数据库服务器主机 <br /> * @param string $ 数据库服务器帐号 <br /> * @param string $ 数据库服务器密码 <br /> * @param string $ 数据库名 <br /> * @param bool $ 是否保持持续连接，1为持续连接，0为非持续连接 <br /> * @return link_identifier $dbuser, $dbpw, $dbname, <br /> */ <br />function connect($dbhost, $pconnect = 0) { <br /> $error = ''; <br /> $func = $pconnect == 1 ? 'sqlite_popen' : 'sqlite_open'; <br /> if (!$this -> conn = $func($dbhost, 0666, $error)) { <br />  $this -> halt($error); <br /> } <br /> return $this -> conn; <br />} <br />/** <br /> * 执行sql语句 <br /> *  <br /> * @param string $ sql语句 <br /> * @param string $ 默认为空，可选值为 cache unbuffered <br /> * @param int $ cache以秒为单位的生命周期 <br /> * @return resource  <br /> */ <br />function query($sql , $type = '' , $expires = 3600, $dbname = '') { <br /> $error = ''; <br /> $func = $type == 'unbuffered' ? 'sqlite_unbuffered_query' : 'sqlite_query'; <br /> if (preg_match("/^s*select/i", $sql)) { <br />  $query = $func($this -> conn, $sql, sqlite_assoc, $error); <br /> } else { <br />  $query = sqlite_exec($this -> conn, $sql, $error); <br /> }  <br /> if ($error) { <br />  $this -> halt($error, $sql); <br /> } <br /> $this -> querynum++; <br /> return $query; <br />}  <br />/* <br />*@param string $ table名 <br />*@param string $ where条件 <br />*@param string $ colum名 <br /> <br />*@param string $ limit数量  <br /> <br />*/ <br />function getlist($table , $wheres = "1=1",  $colums = '*' ,$limits = '3000',$orderbys="id desc") { <br /> $query = $this -> query("select ".$colums." from ".$table." where ".$wheres." order by  ".$orderbys."  limit ".$limits, $type, $expires, $dbname); <br /> while($rs = $this -> fetch_array($query)){ <br />  $datas[]=$rs; <br />  } <br /> //print_r("select ".$colums." from ".$table." where ".$wheres." limit ".$limits); <br /> //print_r($rs);die(); <br /> $this -> free_result($query); <br /> return $datas ; <br />} <br />function add_one($table , $colums ,$data ) { <br /> //die("insert into ".$table." (".$colums.") values(".$data.")"); <br /> $query = $this -> query("insert into ".$table." (".$colums.") values(".$data.")", $type, $expires, $dbname); <br /> //return $this->insert_id(); <br /> return $query; <br />} <br />function delist($table , $idarray,$wheres="no") { <br /> if($wheres=='no') <br />  $query = $this -> query("delete from ".$table." where id in(".$idarray.")", $type, $expires, $dbname); <br /> else <br />  $query = $this -> query("delete from ".$table." where ".$wheres, $type, $expires, $dbname); <br /> return $query; <br />} <br />function updatelist($table , $updatedata,$idarray) { <br /> $query = $this -> query("update ".$table." set ". $updatedata."  where id in(".$idarray.")", $type, $expires, $dbname); <br /> return $query; <br />} <br />//update max_vote set maxtitle='$title',maxban='$ban', <br />/** <br /> * 执行sql语句，只得到一条记录 <br /> *  <br /> * @param string $ sql语句 <br /> * @param string $ 默认为空，可选值为 cache unbuffered <br /> * @param int $ cache以秒为单位的生命周期 <br /> * @return array  <br /> */ <br />function get_one($sql, $type = '', $expires = 3600, $dbname = '') { <br /> $query = $this -> query($sql, $type, $expires, $dbname); <br /> $rs = $this -> fetch_array($query); <br /> $this -> free_result($query); <br /> return $rs ; <br />} <br />/** <br /> * 从结果集中取得一行作为关联数组 <br /> *  <br /> * @param resource $ 数据库查询结果资源 <br /> * @param string $ 定义返回类型 <br /> * @return array  <br /> */ <br />function fetch_array($query, $result_type = sqlite_assoc) { <br /> return sqlite_fetch_array($query, $result_type); <br />} <br />/** <br /> * 取得前一次 sqlite操作所影响的记录行数 <br /> *  <br /> * @return int  <br /> */ <br />function affected_rows() { <br /> return sqlite_changes($this -> conn); <br />} <br />/** <br /> * 取得结果集中行的数目 <br /> *  <br /> * @return int  <br /> */ <br />function num_rows($query) { <br /> return sqlite_num_rows($query); <br />} <br />/** <br /> * 返回结果集中字段的数目 <br /> *  <br /> * @return int  <br /> */ <br />function num_fields($query) { <br /> return sqlite_num_fields($query); <br />} <br />/** <br /> *  <br /> * @return array 备用,一般不用. <br /> */ <br />function result($query, $row) { <br /> return @sqlite_fetch_all($query, sqlite_assoc); <br />}  <br />/** <br /> * sqlite没有相应函数 <br /> */ <br />function free_result($query) { <br /> return ; <br />} <br />/** <br /> * 取得上一步 insert 操作产生的 id <i>本文@来#源gaodai$ma#com搞$$代**码网</i><strong>搞代gaodaima码</strong><br /> *  <br /> * @return int  <br /> */ <br />function insert_id() { <br /> return sqlite_last_insert_rowid($this -> connid); <br />} <br />/** <br /> *  <br /> * @return array 只得到数字索引 <br /> */ <br />function fetch_row($query) { <br /> return sqlite_fetch_array($query, sqlite_num); <br />}  <br />/** <br /> */ <br />function fetch_assoc($query) { <br /> return $this -> fetch_array($query, sqlite_assoc); <br />}  <br />/** <br /> *  <br /> * @return string  <br /> */ <br />function version() { <br /> return sqlite_libversion(); <br />} <br />function close() { <br /> return sqlite_close($this -> conn); <br />} <br />/** <br /> *  <br /> * @return string  <br /> */ <br />function error() { <br /> return sqlite_error_string($this -> errno); <br />} <br />/** <br /> *  <br /> * @return int  <br /> */ <br />function errno() { <br /> return sqlite_last_error($this -> conn); <br />} <br />/** <br /> * 显示mysql教程错误信息 <br /> */ <br />function halt($message = '', $sql = '') { <br /> exit("sqlitequery:$sql <br> sqliteerror:" . $this -> error() . " <br> sqliteerrno:" . $this -> errno() . " <br> message:$message"); <br />}

希望本文所述对大家的PHP数据库程序设计有所帮助。

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