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Array Description
$_COOKIE Contains keys and values set as browser cookies
$_ENV Contains keys and values set by the script's shell context
$_FILES Contains information about uploaded files
$_GET Contains keys and values submitted to the script using the HTTP get method
$_POST Contains keys and values submitted to the script using the HTTP post method
$_REQUEST A combined array containing values from the $_GET, $_POST, and $_COOKIES superglobal arrays
$_SERVER Variables made available by the server
$GLOBALS Contains all global variables associated with the current script
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