json response to array php code example

Example 1: php return json

header('Content-type: application/json');
echo json_encode($array);

Example 2: php json encode

$person = array( 
    "name" => "Johny Carson", 
    "title" => "CTO"
); 
$personJSON=json_encode($person);//returns JSON string

Example 3: return json in php

//code igniter
$query="qry";
$query = $this->db->query($query);
$res=$query->result();
return json_encode($res);