FLICKR PHP

1
FLICKR PHP

• ETHEL D COFIE
• www.ethelcofie.com

2
Preparation

• 1. Obtain an API key
• 2.Configure your key-Shared Secret

3
Use both keys to construct login url

• If you're not using an API kit, then construct
  the url as follows
• http//flickr.com/services/auth/?api_keyapi_key
  permspermsapi_sigapi_sig
• PHP
• secret_key1234567889
• params array(api_keygt 123456676,perms
  gt write)
• encoded_param array()
• foreach(params as key gt value)encoded_para
  ms urlencode(key)..urlencode(value)
• apisigmd5(secret_key.api_key.params'api_key
  '.perms.params'perms')
• url http//flickr.com/services/auth/?.
• implode(,encoded_params).api_sig.apisig
• header(Location.url) gtThis will then
  redirect back to your call back url and include a
  frob value()
• (api_sig is a signature of the other two
  parameters. Signatures are created using your
  secret and the other argumnents listed in
  alphabetical order, name then value.)

4
Create an auth handler(Part 1 )

• When users follow your login url, they are
  directed to a page on flickr.com which asks them
  if they want to authorize your application
• When the user accepts the request, they are sent
  back to the Callback URL you defined
• PHP
• if (_REQUEST'frob')//using php_serial
  paramater serial to retrieve the format in
  serialized data structurefrobparams
  array(api_keygt api_key,frob gt frob
  ,method gt flickr.auth.getToken,format gt
  php_serial)
• encoded_param array()
• foreach(frobparams as key gt value)encoded_
  params urlencode(key)..urlencode(value)
  url http//api.flickr.com/services/rest/?.i
  mplode(, encoded_params)

5
Create an auth handler(Part 2 )

• Get url response/contentsrsp
  file_get_contents(url)
• rsp_obj unserialize(rsp)
• detailsrsp_obj
• Glean Auth Token from details
• if(detailsstatok)echo
  details'auth''token''_content'else
• //display error message if there is a
  problemecho details message

6
Make an authenticated method call

• function curlpost(data)
• keys'1234567788555' // api key
• url "http//api.flickr.com/services/upload/"
• ch curl_init()
• //print_r(data)
• // set the target url
• curl_setopt(ch,CURLOPT_URL,url)
• curl_setopt(ch,CURLOPT_POST,1)
• curl_setopt(ch,CURLOPT_HTTP_VERSION,'HTTP/1.1')
• curl_setopt(ch,CURLOPT_HEADER,0)
• curl_setopt (ch, CURLOPT_HTTPHEADER,
  Array("Content-Type multipart/form-data"))
•  
•  
• data'api_sig'md5(keys.'api_key'.base64_url_de
  code(data'api_key').'auth_token'.base64_url_dec
  ode(data'auth_token'))
• // the parameters
• encoded_params array()
• //encoded_params'title'data'title'
• encoded_params'api_key' base64_url_decode(da
  ta'api_key')

7
Make an authenticated method call

• Using function
• upload_result curlpost(_REQUEST)
• parse xml_parser_create() // reates a new XML
  parser and returns a resource handle referencing
  it to be used by the other XML functions.
• xml_parse_into_struct(parse,upload_result,
  vals, index)// his function parses an XML file
  into 2 parallel array structures, one (index )
  containing pointers to the location of the
  appropriate values in the values array. These
  last two parameters must be passed by reference.
• xml_parser_free(parse)
• //foreach to find status
• status_check
• outfalse
• for(i0 iltcount(vals) i)
• while((valsi'attributes''STAT' 'ok')
  outfalse)
• status_check true
• 
  outtrue// checks to make sure it exists while
  loop

8
Make an authenticated method call

• //foreach to get photosetid to be used in url
• photoid
• if( status_check true)
• foreach(vals as findphoto)
• if(findphoto'tag''PHOTOID')
• //
  print_r(findphoto)
• photo_details'prim
  ary_photo_id'findphoto'value' //use to get
  photo link
• Image upload sample
• flickrbarcamp_at_yahoo.com
• Ethel Flickr demo .To demonstrate use of flickr
  API at bar camp