call a string/function from database

Maybe like this

get_option( "mese_giambellino" );

This retrieves what you saved with update_option()

More about WP options you can read here (http://codex.wordpress.org/Options_API)

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