Troubleshooting of SonarQube issue

This article "Troubleshooting of SonarQube issue" is still being written. If there are any incomplete parts, you are welcome to directly edit them. 這篇文章「Troubleshooting of SonarQube issue」內容還在撰寫中，如果有不完整的部分，歡迎你直接動手修改。

How to resolve "Define and throw a dedicated exception instead of using a generic one"

Error condition which met "Define and throw a dedicated exception instead of using a generic one" ^[1]

if(is_null($some_variable)){
            $error = 'The variable $some_variable is not defined.';
            throw new Exception($error);
        }

Possible solution

if(!is_null($some_variable)){
            $error = 'The variable $some_variable is not defined.';
            throw new InvalidArgumentException($error);
        }