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PHP5环境下采用Sqlite数据库开发小小总结

Jun 13, 2016 am 10:36 AM
php5 sqlite Down blog develop Summarize database environment use

最近花了10多天重新写了泡菜博客,采用了PHP5+SQLITE技术。原因是MYSQL管理非常麻烦,而且还得花钱另外买数据库。

sqlite 是一款轻量级的、基于文件的嵌入式数据库,2000年就已经诞生,经过7年多的发展,直到今天已经成为最流行的嵌入式数据库,包括Google在内的公司在其桌面软件中亦使用 sqlite 存储用户数据。由此可以看出,已经没有任何理由去怀疑sqlite的稳定性了。(此段载自蓝雨设计)

那么如何在PHP5中使用呢?PHP5中有2种连接sqlite的方法。一种是默认提供的,另一种是PDO类。默认的只支持sqlite2,但是PDO可以间接支持sqlite3。下面是我写的简单的PDO类可以兼容2个版本。


以下为引用的内容:
class SQLite{
    function __construct($file){
        try{
            $this->Connection=new PDO(sqlite2:.$file);
        }catch(PDOException $e){
            try{
                $this->Connection=new PDO(sqlite:.$file);
            }catch(PDOException $e){
                exit(error!);
            }
        }
    }
    function __destruct(){
        $this->Connection=null;
    }
    function Query($SQL){
        return $this->Connection->Query($SQL);
    }
    function Execute($SQL){
        return $this->Query($SQL)->fetch();
    }
    function RecordArray($SQL){
        return $this->Query($SQL)->fetchAll();
    }
    function RecordCount($SQL){
        return count($this->RecordArray($SQL));
    }
    function RecordLastID(){
        return $this->Connection->lastInsertId();
    }
}
 

然后实例化,在实例化中如果数据库存在就自动打开,不存在就会自动创建数据库。


以下为引用的内容:
$DB=new SQLite(blog.db);  //这个数据库文件名字任意
 

创建数据库表


以下为引用的内容:
$DB->Query("create table test(id integer primary key,title varchar(50)");
 

接下来添加数据


以下为引用的内容:
$DB->Query("insert into test(title) values(泡菜)");  
$DB->Query("insert into test(title) values(蓝雨)");  
$DB->Query("insert into test(title) values(Ajan)");  
$DB->Query("insert into test(title) values(傲雪蓝天)"); 
 

之后就是如何读取数据了。也就是循环。


以下为引用的内容:
$SQL=select title from test order by id desc;  
foreach($DB->Query($SQL) as $RS){  
    echo $RS[title];  
}  
 

对于企业来说SQLITE可能会小点,但是对于个人来说它确实是个好东西,可移植性非常好。

本人水平有限,如果以上内容有错误请指正。谢谢!

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