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Phát triển web với PHP và MySQL - p 4

INTRODUCTION 5 Cost PHP is free. You can download the latest version at any time from http://www.php.net for no charge. Learning PHP The syntax of PHP is based on other programming languages, primarily C and Perl. If you already know C or Perl, or a C-like language such as C++ or Java, you will be productive using PHP almost immediately. Portability PHP is available for many different operating systems. You can write PHP code on the free Unixlike operating systems such as Linux and FreeBSD, commercial Unix versions such as Solaris and IRIX, or on different versions of Microsoft Windows. Your code will usually work without modification. | 5 Introduction Cost PHP is free. You can download the latest version at any time from http www.php.net for no charge. Learning PHP The syntax of PHP is based on other programming languages primarily C and Perl. If you already know C or Perl or a C-like language such as C or Java you will be productive using PHP almost immediately. Portability PHP is available for many different operating systems. You can write PHP code on the free Unix-like operating systems such as Linux and FreeBSD commercial Unix versions such as Solaris and IRIX or on different versions of Microsoft Windows. Your code will usually work without modification on a different system running PHP. Source Code You have access to the source code of PHP. Unlike commercial closed-source products if there is something you want modified or added to the language you are free to do this. You do not need to wait for the manufacturer to release patches. You don t need to worry about the manufacturer going out of business or deciding to stop supporting a product. Some of MySQL s Strengths Some of MySQL s main competitors are PostgreSQL Microsoft SQL Server and Oracle. MySQL has many strengths including high performance low cost easy to configure and learn portable and the source code is available. A more detailed discussion of these strengths follows. Performance MySQL is undeniably fast. You can see the developers benchmark page at http web.mysql.com benchmark.html. Many of these benchmarks show MySQL to be orders of magnitude faster than the competition. Low Cost MySQL is available at no cost under an Open Source license or at low cost under a commercial license if required for your application. 6 PHP and MySQL Web Development Ease of Use Most modern databases use SQL. If you have used another RDBMS you should have no trouble adapting to this one. MySQL is also easier to set up than many similar products. Portability MySQL can be used on many different UNIX systems as well as under Microsoft Windows. Source .