Enabling WP_USE_EXT_MYSQL to support old plugin

I think the problem you are going to have is that of Depreciation. As php is upgraded they will only have the libraries for mysqli installed. This may in the future cause your plugin to stop working.

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Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)