json object is not converting to php array code example

Example 1: php json_decode

$personJSON = '{"name":"Johny Carson","title":"CTO"}';

$person = json_decode($personJSON);

echo $person->name; // Johny Carson

Example 2: php json encode

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