Linkedin API - get full data - php

Question

I try to make an script to get data from LINKEDIN, i am able to get many of information about profile like name, mail, phone, picture url and so on, unfortunately how ever I try I can't get to informations like work experience and many other.
My Request looks like:
$xml_response = $linkedin->getProfile("~:(id,first-name,last-name,interests,publications,patents,languages,skills,date-of-birth,email-address,phone-numbers,im-accounts,main-address,twitter-accounts,headline,picture-url,public-profile-url)");
This work correctly, but lets try to add companies
Error:
I added it at the end of $linkedin->getProfile and here is the
error message what I get:
[message] => Unknown field {companies} in resource {Person}
Full function looks like:
public function linkedinGetUserInfo( $requestToken='', $oauthVerifier='', $accessToken=''){
include_once 'linkedinoAuth.php';
$linkedin = new LinkedIn($this->config['linkedin_access'], $this->config['linkedin_secret']);
$linkedin->request_token = unserialize($requestToken); //as data is passed here serialized form
$linkedin->oauth_verifier = $oauthVerifier;
$linkedin->access_token = unserialize($accessToken);
try{
$xml_response = $linkedin->getProfile("~:(id,first-name,last-name,interests,publications,patents,languages,skills,date-of-birth,email-address,phone-numbers,im-accounts,main-address,twitter-accounts,headline,picture-url,public-profile-url,educations,companies)");
}
catch (Exception $o){
print_r($o);
}
return $xml_response;
}
Documentation I found (but didn't help me )
https://developer.linkedin.com/docs/fields
I expect I miss something really stupid but cant figurate it out, can somone help me?

Answer 1

LinkedIn provided all these fields before May 12th 2015.
https://api.linkedin.com/v1/people/~:(id,first-name,last-name,email-address,picture-url,industry,associations,interests,num-recommenders,date-of-birth,honors-awards,three-current-positions,three-past-positions,volunteer,location," +
"positions:(id,title,summary,start-date,end-date,is-current,company:(id,name,type,size,industry,ticker))," +
"educations:(id,school-name,field-of-study,start-date,end-date,degree,activities,notes)," +
"publications:(id,title,publisher:(name),authors:(id,name),date,url,summary),"+
"languages:(id,language:(name),proficiency:(level,name)),"+
"skills:(id,skill:(name)))";
"courses:(id,name,number),"+
"recommendations-received:(id,recommendation-type,recommendation-text,recommender))";
"patents:(id,title,summary,number,status:(id,name),office:(name),inventors:(id,name),date,url))";
But, they have updated their APIs link:https://developer.linkedin.com/support/developer-program-transition
According to which only these
Profile API — /v1/people/~
Share API — /v1/people/~/shares
Companies API — /v1/companies/{id}
endpoints will be active, Rest require a Apply with Linkedin /Partner with Linked association.
phone-numbers,im-accounts,main-address,twitter-accounts,headline would come under r_contactinfo which needs a Apply with linkedin

Answer 2

Instead of companies, you must use positions keyword.
$xml_response = $linkedin->getProfile("~:(id,first-name,last-name,positions)");
Positions field description in the following address.
https://developer.linkedin.com/docs/fields/positions