PHP: Grab specific data from a JSON string

[go4e-moh]

\[code\]$url = "https://graph.facebook.com/fql?q=SELECT%20uid2%20FROM%20friend%20WHERE%20uid1=me()&access_token=sadfasdf";$ch = curl_init();curl_setopt($ch, CURLOPT_URL, $url);curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);curl_setopt($ch, CURLOPT_HEADER, 0);curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2 GTB5');$string = curl_exec($ch); // grab URL and pass it to the browserecho $string;curl_close($ch);\[/code\]Right now, \[code\]echo $string\[/code\] outputs the entire data grabbed as plain text.\[code\]{ "data": [ { "uid2": "91298391" }, { "uid2": "00291509" }, { "uid2": "101927261" }]}\[/code\]How can I instead grab specific data similar to JSON? In this case, I want to be able to grab every id. I have a feeling I will use \[code\]preg_match\[/code\] but I'm stumped.