json from array in php code example

Example 1: php convert array to json object

$myArr = array("apple", "banana", "mango", "jackfruit");

$toJSON = json_encode($myArr);

echo $toJSON;

Example 2: return json in php

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