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Validate Facebook Connect Cookie

/ Published in: PHP
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Use this function to validate cookies set by Facebook Connect JS API

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  1. function _validateFBConnectCookie(){
  2. 	$params = array();
  3. 	$apiKey = Configure::read('Settings.fb_api_key');
  4.  
  5. 	foreach($_COOKIE as $key=>$value){
  6.  
  7. 		if( strpos($key, $apiKey.'_') === 0 ){
  8.  
  9. 			$paramName = substr($key, strlen($apiKey)+1);
  10.  
  11. 			$params[$paramName] = $value;
  12. 		}
  13. 	}
  14. 	ksort($params);
  15. 	$secret = Configure::read('Settings.fb_secret');
  16. 	$str = '';
  17. 	foreach($params as $key=>$value){
  18. 		$str .= $key.'='.$value;
  19. 	}
  20.  
  21. 	$calculatedSig = md5($str.$secret  );
  22.  
  23. 	if(!empty($_COOKIE[$apiKey] ) && $_COOKIE[$apiKey] === $calculatedSig){
  24. 		return true;
  25. 	}
  26. 	return false;
  27. }

URL: validate_facebook_connect_cookie

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