只获取特定代码

Question

In my site user get their own secret code with access token and submit That code in my site and from this all code I only want to take access token with the help of php... Check this ScreenShootss.jpg

Example of access token {"session_key":"5.TVJlCXvhgqdhpA.1497109242.26-100007001746590","uid":100007001746590,"secret":"80cc3dc2ba89e635dcf84b41d6efcc38","access_token":"EAAAAAYsX7TsBAEa6qMaCj1qCgnOKFHBcfu76C6PrUdK1LnIh39jmabZAdVWmQLO3Ol64ZCXY4388DBfUwksxONGXE5dUY0mK9M07aszl5Qvs8ccqQ39xLEsK2gc1RUJQ0Kqy1ror7R8EPHZCX6pOzX0o4oQAJ1kOq8Oz0n0GysK64ebCsDEokwG36j1awnYaDoJPvOn2AZDZD","machine_id":"-hI8WaLcNeEVUSPuxcEpmhQU","confirmed":true}

And I also try to separate access token by separating all this code but this actually not working

Here is my php script

if(isset($_POST['submit'])) {
    $token2 = $_POST['token'];
    if(preg_match("'access_token=(.*?)&expires_in='", $token2, $matches)){
        $token = $matches[1];
            }
    else{
        $token = $token2;
    }
        $extend = get_html("https://graph.facebook.com/me/permissions?access_token="  . $token);

How to do this and thanks in advance

Answer 1

You can use this code to get only access_token from JSON code

if(isset($_POST['submit'])) {
    $token2 = $_POST['token'];
    $obj = json_decode($token2);
    echo "Access Token is: <br />". $obj->{'access_token'}; // You can remove it or use this value
    $token = $obj->{'access_token'};
    $extend = get_html("https://graph.facebook.com/me/permissions?access_token="  . $token);
}