Answer
Superglobals ($_GET, $_POST, $_SESSION, $_COOKIE, $_SERVER) are built-in arrays available globally.
Quick Answer
Superglobals are built-in global arrays accessible from any scope. $_GET (URL query params), $_POST (form data), $_REQUEST (GET+POST+COOKIE), $_SESSION (session data), $_COOKIE (cookie values), $_SERVER (server/request info), $_FILES (file upload data), $_ENV (environment variables), $GLOBALS (all global variables). Always validate and sanitize superglobal data before use.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ