Did the divorce take effect by the husband's saying to his wife, "You are divorced from now" online, after she asked him to divorce her, and did the dhihar take effect by her saying to him, "May Allah set a limit between me and you"?

A single divorce occurs when the husband says: "Consider it one [divorce]," and he has the right to take his wife back during her iddah (waiting period) by word or action. As for the wife's statement "Allah has set a boundary between us" and his reply "As you wish," nothing results from it. The questioner is advised to ignore whispers [of doubt] and seek Allah's help.