CodeIgniter框架常见用法工作总结

$this->load;
$this->load->database();
$this->load->view();
$this->load->helper();

$this->uri;
$this->uri->segment(3);

$this->input;

$this->load->database();
$this->db->query('SELECT  FROM blog_user');

$db['default']['dbprefix'] = 'blog_';
$db['default']['swap_pre'] = 'my_';

$sql = "SELECT  FROM my_archive";

$this->load->helper('url');

site_url('控制器/方法名')

$this->db->insert('archive',$archive); 返回bool值
$insert_id = $this->db->insert_id();
$this->db->insert_batch('archive',$data); //插入多条

$query = $this->db->query($sql); //返回Object
$query->num_rows() 或者 $query->num_rows 返回查询出多少条
if($query->num_rows() > 0){
 return $query->result();//$query->row() $query->result_array() $query->row_array()
}else{
 return false;
}
$query->last_query();

$bool = $this->db->where('id >','74835')->update('archive', $data);
$this->db->affected_rows(); //影响行数

$bool = $this->db->delete('tablename', array('id' => '500'));
$bool = $this->db->where(array('id' => 500))->delete('tablename');
$this->db->affected_rows(); //影响行