Use external data or something in the class method...

{Code...} is the content output by foreach () in the class method by external styles or something. Can this function be implemented? How is it done?

Class a {funtion o () {$ pdo = new PDO (......); $ O = $ pdo-> query ('selece... '); Foreach ($ o as $ s) {return: Is data introduced here or is it called? }}}$ X = new a (); echo $ x-> o ("$ s ['id']-$ s ['name']");

The content output by foreach () in the class method is external styles or something.
Can this function be implemented?
How is it done?

Reply content:

Class a {funtion o () {$ pdo = new PDO (......); $ O = $ pdo-> query ('selece... '); Foreach ($ o as $ s) {return: Is data introduced here or is it called? }}}$ X = new a (); echo $ x-> o ("$ s ['id']-$ s ['name']");

The content output by foreach () in the class method is external styles or something.
Can this function be implemented?
How is it done?

Passing parameters in the constructor,

I think it is better to return data from the class O Method and format and display the data after the call, so that the presentation and processing are separated.