A PHP Error was encountered

Severity: Notice

Message: Trying to access array offset on value of type null

Filename: Service/CourseService.php

Line Number: 51

Backtrace:

File: /yunketang/wwwroot/web/app/Service/CourseService.php
Line: 51
Function: _error_handler

File: /yunketang/wwwroot/web/app/Controllers/portMember/trmlPc/Core.php
Line: 149
Function: getCategory

File: /yunketang/wwwroot/web/app/Controllers/portMember/trmlPc/Core.php
Line: 106
Function: buildMenu

File: /yunketang/wwwroot/web/app/Controllers/portMember/trmlPc/Home.php
Line: 67
Function: view

File: /yunketang/wwwroot/web/public/index.php
Line: 323
Function: require_once

A PHP Error was encountered

Severity: Notice

Message: Trying to access array offset on value of type null

Filename: Service/CourseService.php

Line Number: 51

Backtrace:

File: /yunketang/wwwroot/web/app/Service/CourseService.php
Line: 51
Function: _error_handler

File: /yunketang/wwwroot/web/app/Controllers/portMember/trmlPc/Core.php
Line: 149
Function: getCategory

File: /yunketang/wwwroot/web/app/Controllers/portMember/trmlPc/Core.php
Line: 106
Function: buildMenu

File: /yunketang/wwwroot/web/app/Controllers/portMember/trmlPc/Home.php
Line: 67
Function: view

File: /yunketang/wwwroot/web/public/index.php
Line: 323
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: count(): Parameter must be an array or an object that implements Countable

Filename: Service/CourseService.php

Line Number: 54

Backtrace:

File: /yunketang/wwwroot/web/app/Service/CourseService.php
Line: 54
Function: count

File: /yunketang/wwwroot/web/app/Controllers/portMember/trmlPc/Core.php
Line: 149
Function: getCategory

File: /yunketang/wwwroot/web/app/Controllers/portMember/trmlPc/Core.php
Line: 106
Function: buildMenu

File: /yunketang/wwwroot/web/app/Controllers/portMember/trmlPc/Home.php
Line: 67
Function: view

File: /yunketang/wwwroot/web/public/index.php
Line: 323
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: Invalid argument supplied for foreach()

Filename: trmlPc/Core.php

Line Number: 151

Backtrace:

File: /yunketang/wwwroot/web/app/Controllers/portMember/trmlPc/Core.php
Line: 151
Function: _error_handler

File: /yunketang/wwwroot/web/app/Controllers/portMember/trmlPc/Core.php
Line: 106
Function: buildMenu

File: /yunketang/wwwroot/web/app/Controllers/portMember/trmlPc/Home.php
Line: 67
Function: view

File: /yunketang/wwwroot/web/public/index.php
Line: 323
Function: require_once