1. 数据库
/*数据insert*/
/*$data = array(
'accountid' => '1',
'adminid' => '2',
'fee' => '50',
'state' => '1',
'createtime' => time(),
'lastupdatetime' => time()
);
$this->db->insert('repay_his', $data);
$this->db->set('url', 'www.mynewclinet.com');
$this->db->set('name', 'BigCo Inc');
$this->db->set('clientid', '33');
$this->db->set('type', 'dynamic');
$this->db->insert('repay_his');
$new_id_number = $this->db->insert_id();//获取自增id数据修改
/*修改*/
/* $data = array(
'accountid' => '1',
'adminid' => '2',
'fee' => '100',
'state' => '1',
'createtime' => time(),
'lastupdatetime' => time()
);*/
//$this->db->where('id', '1');
//$this->db->update('repay_his', $data);
/*数据读取*/
/*$query = $this->db->get('sessions_data');
foreach ($query->result() as $row)
{
// print_r($row);
}
$query = $this->db->query("SELECT * FROM c_repay_his WHERE id =1");
$this->db->select('url,name,clientid,people.surname AS client');
$this->db->where('clientid', '3');
$this->db->limit(5);
$this->db->from('sites');
$this->db->join('people', 'sites.clientid = people.id');
$this->db->orderby("name", "desc");
$query = $this->db->get();
//free_result() 释放当前查询所占用的内存并删除关联资源标识
$data = $query->free_result();
print_r($query->result_array());
*/
/*数据读取*/
/*数据删除*/
//$this->db->where('id', '20');
//$this->db->delete('repay_his');
//echo $this->db->affected_rows();//验证是否执行成功
/*数据删除*/
/*$this->load->library('calendar');
/*分页类*/
$this->load->library('pagination');
$config['base_url'] = 'http://example.com/index.php/test/page/';
$config['total_rows'] = 200;
$config['per_page'] = 20;
$this->pagination->initialize($config);
echo $this->pagination->create_links();
/*分页类*/
$this->load->view('test/index');
//$this->output->cache(20);输出缓存
数据查询
/*
查询
$query = $this->db_query("SELECT * FROM table");
//result() 返回对象数组
$data = $query->result();
//result_array() 返回数据
$data = $query->result_array();
//row() 只返回一行对象数组
$data = $query->row();
//num_rows() 返回查询结果行数
$data = $query->num_rows();
//num_fields() 返回查询请求的字段个数
$data = $query->num_fields();
//row_array() 只返回一行数组
$data = $query->row_array();
//free_result() 释放当前查询所占用的内存并删除关联资源标识
$data = $query->free_result();
/*
==================================
插入操作
==================================
*/
//上次插入操作生成的ID
echo $this->db->insert_id();
//写入和更新操作被影响的行数
echo $this->db->affected_rows();
//返回指定表的总行数
echo $this->db->count_all('table_name');
//输出当前的数据库版本号
echo $this->db->version();
//输出当前的数据库平台
echo $this->db->platform();
//返回最后运行的查询语句
echo $this->db->last_query();
//插入数据，被插入的数据会被自动转换和过滤，例如：
//$data = array('name' => $name, 'email' => $email, 'url' => $url);
$this->db->insert_string('table_name', $data);
/*
==================================
更新操作
==================================
*/
//更新数据，被更新的数据会被自动转换和过滤，例如：
//$data = array('name' => $name, 'email' => $email, 'url' => $url);
//$where = "author_id = 1 AND status = 'active'";
$this->db->update_string('table_name', $data, $where);
/*
==================================
选择数据
==================================
*/
//获取表的全部数据
$this->db->get('table_name');
//第二个参数为输出条数，第三个参数为开始位置
$this->db->get('table_name', 10, 20);
//获取数据，第一个参数为表名，第二个为获取条件，第三个为条数
$this->db->get_where('table_name', array('id'=>$id), $offset);
//select方式获取数据
$this->db->select('title, content, date');
$data = $this->db->get('table_name');
//获取字段的最大值，第二个参数为别名，相当于max(age) AS nianling
$this->db->select_max('age');
$this->db->select_max('age', 'nianling');
//获取字段的最小值
$this->db->select_min('age');
$this->db->select_min('age', 'nianling');
//获取字段的和
$this->db->select_sum('age');
$this->db->select_sum('age', 'nianling');
//自定义from表
$this->db->select('title, content, date');
$this->db->from('table_name');
//查询条件 WHERE name = 'Joe' AND title = "boss" AND status = 'active'
$this->db->where('name', $name);
$this->db->where('title', $title);
$this->db->where('status', $status);
//范围查询
$this->db->where_in('item1', 'item2');
$this->db->where_not_in('item1', 'item2');
//匹配，第三个参数为匹配模式 title LIKE '%match%'
$this->db->like('title', 'match', 'before/after/both');
2. Benchmarking类库能够计算出任意两个被标记点之间的代码执行时间。通过这个数值，可以评估程序员编写的程序的效率。
$this->benchmark->mark('dog');
// Some code happens here
$this->benchmark->mark('cat');
// More code happens here
$this->benchmark->mark('bird');
echo $this->benchmark->elapsed_time('dog', 'cat');
echo $this->benchmark->elapsed_time('cat', 'bird');
echo $this->benchmark->elapsed_time('dog', 'bird');
3.页面执行时间,占用内存,header信息,数据库执行时间显示及执行的语句
$this->output->enable_profiler(TRUE);
4.form验证
this->load->library('form_validation');
//$this->load->model('entries_model');调用模型
$this->form_validation->set_rules('title', 'Title', 'required');
$this->form_validation->set_rules('content', 'Content', 'required');
//$this->form_validation->set_rules('passconf', 'Password Confirmation', 'required');
//$this->form_validation->set_rules('email', 'Email', 'required|valid_emails');
if ($this->form_validation->run() == FALSE)
{
$this->load->view('test/form');
}
