The alternative method to make data accessible over the many pages for the whole website is to use a PHP Session. A session creates a file in a temporary directory on the server where registered session variables and their values are saved. This data will be available to each page on the website during that visit. The place of the temporary file is defined by a setting in the php.ini file called session.save_path. Since using any session variable make sure you want to setup this path.
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