Response Array zu Variable

[super-mario]

Moin Liebe leute
Ich habe mal wieder ein Problem in PHP, ich möchte ein Array in Variablen umwandeln bsp:
Ausgabe des Arrays

Array
(
    [success] => 1
    [client] => Array
        (
            [id] => 20
            [email] => demo
            [password] => demo
            [lastlogin] => demo
            [ip] => demo
            [host] => v
            [status] => Active
            [parent_id] => 0
            [firstname] => demo
            [lastname] => demo
            [companyname] => 
            [address1] => demo
            [address2] => 
            [city] => demo
            [state] => demo
            [postcode] => demo
            [country] => DE
            [phonenumber] => demo
            [datecreated] => demo
            [notes] => 
            [language] => german
            [company] => 0
            [credit] => 0.00
            [taxexempt] => 0
            [latefeeoveride] => 0
            [cardtype] => demo
            [cardnum] => 
            [expdate] => 
            [overideduenotices] => 0
            [client_id] => 20
            [currency_id] => 0
            [geburtsdatum] => 
            [countryname] => Germany
        )

    [call] => getClientDetails
    [server_time] => 1331232576
) 

Ich habe es mit einer schleife versucht, mein verständnis begreift es leider nicht, bitte um hilfe

<?php
   $url = 'demo';
   $post = array(
      'api_id' => 'demo',
      'api_key' => 'demo',
      'call' => 'getClientDetails',
      'id'=>40
   );
   $ch = curl_init();
   curl_setopt($ch, CURLOPT_URL, $url);
   curl_setopt($ch, CURLOPT_POST, 1);
   curl_setopt($ch, CURLOPT_TIMEOUT, 30);
   curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
   curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
   curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
   curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
   $data = curl_exec($ch);
   curl_close($ch);
  
   $return = json_decode($data, true);
   print_r($return);
?>

Ich danke um mithilfe. lg