REST API, send Sugarcrm data to an other application

hi everyone, 

I'm new on sugraCRM,

i need to send data via URL to external application to send phone number of contact, can you give me simple example to coding this need,

the curl :"

and i use this array to the authentication 

$parameters = array(
    'user_name' => 'user',
    'password' => 'password',
SugarCRM version 7.8