Web Reference: Several predefined variables in PHP are "superglobals", which means they are available in all scopes throughout a script. There is no need to do global $variable; to access them within functions or methods. Some predefined variables in PHP are "superglobals", which means that they are always accessible, regardless of scope - and you can access them from any function, class or file without having to do anything special. May 27, 2025 · PHP superglobals are predefined variables that are globally available in all scopes. They are used to handle different types of data, such as input data, server data, session data, and more.
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