php extract json code example

Example 1: php return json

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

Example 2: how to get data from json array in php

$data = json_decode($json);

Example 3: parse json phph

echo json_decode("[1,2,3]")[0];

Example 4: return json in php

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