PhP (Codeigniter) Merging query results before foreach loop

问题

I would like know if it is possible to merge sql queries like the following from codeigniters active record.

   //get assigned contacts    
      $this->db->select('*, CONCAT(first_name, " " ,last_name) AS name', FALSE);
      $this->db->from('customers_contacts');
      $this->db->join('customers_accounts', 'customers_accounts.contact_id = customers_contacts.contact_id');
      $this->db->like('CONCAT(first_name, " " ,last_name)', $q);
      $results1 = $this->db->get();
    //get non assigned contacts
      $this->db->select('*, CONCAT(first_name, " " ,last_name) AS name', FALSE);
      $this->db->from('customers_contacts');
      $this->db->like('CONCAT(first_name, " " ,last_name)', $q);
      $results2 = $this->db->get();

I tried using $query = array_merge($results1, $results2); but that does not work, I believe because ->get() is returning an array of objects.

So I got it to work by putting both through a foreach loop, and then merging the resulting arrays. But I need to do some conditionals that would be easier in one foreach loop than two.

回答1:

You can use like below

$arr_results1 = $this->db->get()->result_array();
$arr_results2 = $this->db->get()->result_array();
var_dump(array_merge($arr_results1,$arr_results2));

Hope this will help you!

回答2:

After a bit of reading I came up with the following and it works!

//first query here...
$results1 = $this->db->get()->result_array();
//second query here...
$results1 = $this->db->get()->result_array();
//then...
$query = array_merge($results1,$results2);

回答3:

You must always do $results->result(); to get an array of rows after $results = $this->db->get();. note: $results->result(); is an array of objects.

For example

# ...
$results1 = $this->db->get();

# ...
$results2 = $this->db->get();

$results = array();

if ($results1->num_rows()) 
{
    $results = array_merge($results, $results1->result());
}

if ($results2->num_rows())
{
    $results = array_merge($results, $results2->result());
}

return $results;

This will return an array of objects (rows) and you iterate through data as usual:

foreach ($results as $row) 
{
    echo $row->id;
    echo $row->column_name_1;
    # and so on...
}

来源：https://stackoverflow.com/questions/32535014/php-codeigniter-merging-query-results-before-foreach-loop

标签

php

mysql

codeigniter

merge

querying