// Get a single query result
public static function fetch($sql){
return $this->conn->query($sql)->fetch( PDO::FETCH_ASSOC);
}
Error:
Fatal error: Using $this when not in object context in D:\Web\api\Db.php on line 79
老铁们，稳！
Check it, it should be that there are a few more curly braces in front of this method, causing your fetch to be defined outside the class, so this situation occurs
111111111111
Can I take a screenshot of the entire page of code?
Fatal error, there is no such object in the $this context, view the content of the variable
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Check it, it should be that there are a few more curly braces in front of this method, causing your fetch to be defined outside the class, so this situation occurs
111111111111
Can I take a screenshot of the entire page of code?
Fatal error, there is no such object in the $this context, view the content of the variable