检查$ this-＆gt; db-＆gt; get（）是否为空

Question

我正在使用codeigniter框架。

如何检查get功能是否为空？

...
$result = $this->db->get() 
 //how to check $result is empty or not ?

Answer 1

你可以这样做

$query = $this->db->get();
if ($query->num_rows() > 0) {
  //record exists - hence fetch the row              
  $result = $query->row();               
} 
else
{
  //Record do not exists
}

Answer 2

您可以查看以下内容，

$result = $this->db->get() ;

if($result->num_rows() != 0){
  //you can do anything with data here
}
else{
  //empty
}

Answer 3

根据Codeigniter Active records Documentation

更好的方法

$query = $this->db->get('mytable');

    if($query->num_rows() > 0) {                   
        foreach ($query->result() as $row){
            echo $row->title;
        }               
    }
    else{
        //no record found.
        }

Answer 4

$result = $this->db->get()->result_array();

现在检查$ result值是否为空。

if(!empty($result)){
//code if not empty
}
else{
//code if empty
}

Answer 5

$result = $this->db->get('myTable')->result();
print_r($result);die();