how to delete a single semicolon separated value from database in Codeigniter - codeigniter

Question

My Database table is like below, table name is add_family :
id , Head_id ,Head_Name , CustomerName customer_id
1 , 2589 , Mitesh , anuj^anil , 456^259
2 , 2590 , vijay , amit^ajay , 852^454
if I want to delete any of customer name and its id then how can I delete it in CodeIgniter? e.g if I want to delete only CustomerName Anuj and his customer_id 456 where Head_id is 2586,
how can I delete it?

Answer 1

What you should do is use query builder class and load database library.
Here's an example from official docs:
$data = array(
'CustomerName' => 'anil',//or NULL if you want to 'delete it'
'customer_id' => '259'//or NULL if you want to 'delete it'
);
$this->db->where('Head_id', 2586);
$this->db->update('add_family', $data);
If you want to do it dynamically and you always want the part after the ^ you can use , for example, the php explode function like this:
$this->db->select('CustomerName, customer_id');
$this->db->where('Head_id', 2586);
$query = $this->db->get('add_family');
$result = $query->row_array();
$data = array(
'CustomerName' => explode('^', $result['CustomerName'])[1],
'customer_id' => explode('^', $result['customer_id'])[1]
);
$this->db->where('Head_id', 2586);
$this->db->update('add_family', $data);
Note that you should not update the ID of a table if it's the primary key.

Answer 2

Try something like this. Idea is that to get value from database of both field and replace customer name with empty string
$query = $this->db->get_where('add_family',array('id'=>1));
$name = str_replace("anuj","", $query['CustomerName']);
$id = str_replace(456, "", $query['customer_id ']);
$data = array(
'CustomerName' => $name,//or NULL
'customer_id' => $id//or NULL
);
$this->db->where('Head_id', 2586);
$this->db->update('add_family', $data);