You will create two main types of variables in your PHP code: scalar and array. Scalar variables contain only one value at a time, and arrays contain a list of values, or even another array.The example at the beginning of this chapter created a scalar variable, and the code in this book deals primarily with scalar variables. You can find information on arrays in Appendix B, "Basic PHP Language Reference." When you assign a value to a variable, you usually assign a va....

The File Transfer Protocol (FTP) is one protocol in the TCP/IP family used to transfer files between machines running TCP/IP (FTP-like programs are also available for some other protocols). The File Transfer Protocol enables you to transfer files back and forth and manage directories. FTP is not designed to give you access to another machine to execute programs, but it is the best utility for file manipulation. To use FTP, both ends of a connection must be running a program th....

If you write macros that other people in your organization use, you should be aware of the Macro Security settings in Excel (and in all Office applications). These settings control the messages you receive when you open a workbook that contains macros; they ask if it’s okay to enable them. In the good old days, developers didn’t have to worry about such things. But with the advent of macro viruses, you now need to take such user-level security settings into account....

The ability to create objects from other Office applications is one of the great things about using VBA. For example, you can write a macro that will create an Outlook message object and attach a shortcut to the currently open workbook. A button on the toolbar will perform this same action, which is fine if that’s all you want to do. But using the sample macro below, you can add other text to the message, pre-address it, or perform other actions. You can also tie the cre....

Whether it’s because you have made a call using a mobile phone, received a message on your pager, checked your email from a PDA or even just seen an advert related to it, we have all come across a wireless data or voice network!If a user, application or company wishes to make data portable, mobile and accessible then wireless networking is the answer. A wireless networking system would rid of the downtime you would normally have in a wired network due to cable problems. ....