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  • DATE_LOCAL
  • DOCUMENT_NAME
  • DOCUMENT_ROOT
  • DOCUMENT_URI
  • GATEWAY_INTERFACE
  • LAST_MODIFIED
  • PATH
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  • REMOTE_ADDR
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  • REQUEST_METHOD
  • SCRIPT_NAME
  • SERVER_NAME
  • SERVER_PORT
  • SERVER_PROTOCOL
  • SERVER_ROOT
  • SERVER_SOFTWARE
In addition, HTTP headers sent by the server may be passed in the environment as well. Here are some common variable names:
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