April 2023

Due to changes in Twitter's developer program specifications, only one app is allowed under the free plan. If you have multiple API accounts, they will be forcibly disabled (with the API accounts entering a SUSPENDED status). Here are the methods to address this situation.

Here is an overview in English of the Japanese blog article: "The blog article introduces a PHP function that checks if a given JAN code is valid. If the JAN code is valid, the function returns true; if it is invalid, it returns false and an error message."