We are going to make use of three environment variables of PHP in order to code this simple PHP class that returns the real IP address of a visitor, even when connecting via a proxy. The three PHP environment variables we`ll use are

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Yes, A tshirt that detects and displays the strength of the nearby available wi-fi signals, and displays them right onto your t-shirt. The glowing animated shirt dynamically displays the current wi-fi signal strength for 802.11b or 802.11gand automatically switches to the strongest available network.

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