Message: Array to string conversion - php

Question

I am trying to search product from the database and then display in view. But it showing me an error that is this...
A PHP Error was encountered
Severity: Notice
Message: Array to string conversion
Filename: database/DB_active_rec.php
Line Number: 679
Here is the code of Controller
function search_prd()
{
$query = $this->input->post();
$this->load->model('prd/addprd');
$prd_search = $this->addprd->prd_search($query);
$this->load->view('prd_search', ['prd_search' => $prd_search]);
}
And this code is MODEL
function prd_search($query)
{
$q = $this->db->from('purchase')
->like('item_name', $query)
->get();
return $q->num_rows();
}

Answer 1

CI's input->post() is an array containing POST data. The second parameter of CI's active record like() expects a string. If you mean to pass an individual field value, you will need to access that index:
<input name="search_value">
$query = $this->input->post('search_value'); //notate the field being used here
Then you can query where like:
$this->db->like('column', $query); //query is now a string
Alternatively, if you mean to pass the entire array, you can use where_in()
$this->db->where_in('column', $query); //if you assign $query to $this->input->post();