- json_encode: documentation ( source)
<?php
json_encode(array (
'action' => 'api_register',
'first_name' => 'test',
'surname' => 'test',
'user_password' => 'cheese',
'user_password_repeat' => 'cheese',
'user_name' => 'test@test.com',
'signup_channel' => 'email',
));