用CI框架向数据库中实现简单的增删改查，ci框架_PHP教程

<span>//</span><span>insert<br /></span><span><span>//语法：$bool=$this->db->insert('表名'，关联数组);<br /></span></span>
<span>$data</span>=<span>array</span><span>(
</span>    'username'=>'mary',
    'password'=>'mary',<span>//建立一个用户名叫mary，密码为mary的数组，并传递给变量$data</span><span>
);
</span><span>$bool</span>=<span>$this</span>->db->insert('user',<span>$data</span><span>);<span>//将$data插入数据库的user表中</span>
</span><span>var_dump</span>(<span>$bool</span>);<span>//成功则返回TURE</span>

<span>//</span><span>delete<br />//语法：<span>$bool=$this->db->delete('表名',WHERE条件);</span></span>
<span>$bool</span>=<span>$this</span>->db->delete('user',<span>array</span>('id'=>3<span>));<span>//删除数据库.user表里id=3的用户所有信息</span>
</span><span>var_dump</span>(<span>$bool</span>);<span>//成功则返回TURE</span>

<span>//<span>update
<span>$data=<span>array<span>(
    'password'=>12345,<span>
);
<span>$bool=<span>$this->db->update('user',<span>$data,<span>array('id'=>3<span>));<span>//将数据库.user表里id=3的用户密码给为12345<br /></span><span>var_dump(<span>$bool);<span>//成功则返回TURE</span></span></span></span></span></span></span></span></span></span></span></span></span></span>

<span>//<span>get
<span>$res=<span>$list=<span>$this->db->get('user'<span>);
<span>//<span>var_dump($list);
<span>foreach(<span>$res->result() <span>as <span>$item<span>){<span>//利用foreach来列出所有用户名</span>
    <span>echo <span>$item-><span>username;
<span>echo '<br />'<span>;
}</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>