Pages.isFan
From Facebook Developer Wiki
Contents |
Description
Checks whether a user is a fan of a given Page. Doesn't work for application About Pages.
Parameters
| Required | Name | Type | Description | |
| required | api_key | string | The application key associated with the calling application. | |
|---|---|---|---|---|
| session_key | string | The session key of the logged in user. | ||
| call_id | float | The request's sequence number. Each successive call for any session must use a sequence number greater than the last. We suggest using the current time in milliseconds, such as PHP's microtime(true) function. | ||
| sig | string | An MD5 hash of the current request and your secret key, as described in the authentication guide. | ||
| v | string | This must be set to 1.0 to use this version of the API. | ||
| optional | format | string | The desired response format, which can be either XML or JSON. (Default value is XML.) | |
| callback | string | Wrap the response inside a function call. This is primarily to enable cross-domain javascript requests using the <script> tag, sometimes known as "JSONP". This works with both XML and JSON. | ||
| page_id | int | The ID of the page. | ||
| uid | int | The ID of the user. Defaults to the logged-in user if not set. |
Response
Returns 1 or 0.
Example Return XML
<?xml version="1.0" encoding="UTF-8"?>
<pages_isFan_response xmlns="http://api.facebook.com/1.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://api.facebook.com/1.0/ http://api.facebook.com/1.0/facebook.xsd">1</pages_isFan_response>
FQL Equivalent
FQL queries take the form: SELECT <fields> FROM <table> WHERE <conditions>
This function is similar (but returning in a slightly different format) to doing the following FQL query, with the appropriate parameters filled in:
SELECT page_id FROM page_fan WHERE uid = <uid>
Error Codes
| Code | Description | |
| 1 | An unknown error occurred. Please resubmit the request. | |
|---|---|---|
| 2 | The service is not available at this time. | |
| 4 | The application has reached the maximum number of requests allowed. More requests are allowed once the time window has completed. | |
| 5 | The request came from a remote address not allowed by this application. | |
| 100 | One of the parameters specified was missing or invalid. | |
| 101 | The API key submitted is not associated with any known application. | |
| 102 | The session key was improperly submitted or has reached its timeout. Direct the user to log in again to obtain another key. | |
| 103 | The submitted call_id was not greater than the previous call_id for this session. | |
| 104 | Incorrect signature. | |
| 210 | User not visible. |
