Forms are how your users talk to your scripts. To get the most out of PHP, you must master forms. The first thing you need to understand is that although PHP makes it easy to access form data, you must be careful of how you work with the data.
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Learn how to make sure the credit card you're accepting isn't fraudulent.
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Learn how to use a mailslot to broadcast information over a network.
Use this simple tool to display and modify the IP-to-Physical address translation tables used by ARP (Address Resolution Protocol), such as Windows command-line arp.exe.
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