Request token retrieval failed:

RESPONSE:

Array
(
    [linkedin] => Array
        (
            [


__400:_Content_Length_Required
__ "content-type" content="text/html; charset=UTF-8">
  






Content Length Required

Could not process this request because Content-Length was not specified. Please double-check the URL (address) you used, or contact us if you feel you have reached this page in error.

Click the [#8220;Back] => [#8221;_button_on_your_browser_or_ "//www.linkedin.com/home">go to the home page.


Are you looking for any of these LinkedIn features?

[nbsp;
] => ) [info] => Array ( [url] => https://api.linkedin.com/uas/oauth/requestToken [content_type] => text/html [http_code] => 411 [header_size] => 275 [request_size] => 531 [filetime] => -1 [ssl_verify_result] => 0 [redirect_count] => 0 [total_time] => 0.361081 [namelookup_time] => 0.004407 [connect_time] => 0.074443 [pretransfer_time] => 0.219171 [size_upload] => 0 [size_download] => 5569 [speed_download] => 15423 [speed_upload] => 0 [download_content_length] => 5569 [upload_content_length] => 0 [starttransfer_time] => 0.361 [redirect_time] => 0 [redirect_url] => [primary_ip] => 144.2.5.4 [certinfo] => Array ( ) [primary_port] => 443 [local_ip] => 221.122.121.160 [local_port] => 50592 ) [oauth] => Array ( [header] => Authorization: OAuth realm="http%3A%2F%2Fapi.linkedin.com",oauth_version="1.0",oauth_nonce="00b140753a51a12ef4194dd55f258747",oauth_timestamp="1601581682",oauth_consumer_key="wrs4inm6jd4c",oauth_callback="http%3A%2F%2Fapi.myechinese.com%3A80%2FApps%2FOpenUser%2FAPI%2Flinkedin%2Findex.php%3FlType%3Dinitiate%26lResponse%3D1",oauth_signature_method="HMAC-SHA1",oauth_signature="%2FDaPuqBBFmRhtXFLUvzI5IwMpdA%3D" [string] => POST&https%3A%2F%2Fapi.linkedin.com%2Fuas%2Foauth%2FrequestToken&oauth_callback%3Dhttp%253A%252F%252Fapi.myechinese.com%253A80%252FApps%252FOpenUser%252FAPI%252Flinkedin%252Findex.php%253FlType%253Dinitiate%2526lResponse%253D1%26oauth_consumer_key%3Dwrs4inm6jd4c%26oauth_nonce%3D00b140753a51a12ef4194dd55f258747%26oauth_signature_method%3DHMAC-SHA1%26oauth_timestamp%3D1601581682%26oauth_version%3D1.0 ) [error] => OAuth callback URL was not confirmed by the LinkedIn end-point [success] => )


LINKEDIN OBJ:

LinkedIn Object
(
    [callback:protected] => http://api.myechinese.com:80/Apps/OpenUser/API/linkedin/index.php?lType=initiate&lResponse=1
    [token:protected] => 
    [application_key:protected] => wrs4inm6jd4c
    [application_secret:protected] => PlJzoRA47VAqHy25
    [response_format:protected] => xml
    [last_request_headers] => Array
        (
            [0] => Authorization: OAuth realm="http%3A%2F%2Fapi.linkedin.com",oauth_version="1.0",oauth_nonce="00b140753a51a12ef4194dd55f258747",oauth_timestamp="1601581682",oauth_consumer_key="wrs4inm6jd4c",oauth_callback="http%3A%2F%2Fapi.myechinese.com%3A80%2FApps%2FOpenUser%2FAPI%2Flinkedin%2Findex.php%3FlType%3Dinitiate%26lResponse%3D1",oauth_signature_method="HMAC-SHA1",oauth_signature="%2FDaPuqBBFmRhtXFLUvzI5IwMpdA%3D"
            [1] => Content-Type: text/plain; charset=UTF-8
        )

    [last_request_url] => https://api.linkedin.com/uas/oauth/requestToken
)