Just because Linux is distributed for free, it doesn’t mean the software is not copyrighted. Linux has been registered as copyrighted under the GNU General Public License (GPL), which is known in the programming community as a copyleft instead of copyright because of its nature. The GPL allows you to redistribute the Linux software, along with the complete source code, to anyone who wants it. However, the original owner of the components retains the copyrights to the sof....

Unlock your phone so that it works with all network operators when you travel or switch plans. It is your phone. Take control of it!. If you bought your phone from a mobile operator, chances are very good that it’s locked to the operator’s network. While the phone itself might be compatible with all GSM networks (i.e., a triband phone), it rejects SIM cards from other GSM operators. Locking imposes some ....

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....