- json_encode: documentation ( source)
<?php
$retClass = 'This is it.';
$page['thisPage'] = $data['thisPage'] = 'Add Asset';
$page['parent'] = (isset($retClass)?($retClass):(''));
if(isset($page['parent']) and ($page['parent'] != '')):
$page['hasParent'] = 'true';
endif;
$page['page'] = '';
echo json_encode($page);