A PHP Error was encountered

Severity: 8192

Message: http_build_query(): Passing null to parameter #2 ($numeric_prefix) of type string is deprecated

Filename: Authentication/OAuth2Client.php

Line Number: 146

Backtrace:

File: /home3/classic2/public_html/staging/application/third_party/facebook-php-graph-sdk/Authentication/OAuth2Client.php
Line: 146
Function: http_build_query

File: /home3/classic2/public_html/staging/application/third_party/facebook-php-graph-sdk/Helpers/FacebookRedirectLoginHelper.php
Line: 128
Function: getAuthorizationUrl

File: /home3/classic2/public_html/staging/application/third_party/facebook-php-graph-sdk/Helpers/FacebookRedirectLoginHelper.php
Line: 142
Function: makeUrl

File: /home3/classic2/public_html/staging/application/libraries/Facebook.php
Line: 134
Function: getLoginUrl

File: /home3/classic2/public_html/staging/application/controllers/Login.php
Line: 344
Function: login_url

File: /home3/classic2/public_html/staging/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /home3/classic2/public_html/staging/system/core/Exceptions.php:271)

Filename: controllers/Login.php

Line Number: 344

Backtrace:

File: /home3/classic2/public_html/staging/application/controllers/Login.php
Line: 344
Function: header

File: /home3/classic2/public_html/staging/index.php
Line: 315
Function: require_once