Introduction to PHP language

PHP's unique syntax mixes C, Java, Perl, and PHP's self-innovative syntax. It can perform dynamic Web pages more quickly than CGI or Perl. PHP is a dynamic page compared to other programming languages, PHP is to embed the program into the HTML document execution, execution efficiency than the full HTML markup of the CGI is much higher; PHP can also execute compiled code, compile can achieve encryption and optimize the code to run, so that the code runs faster. PHP has a very powerful feature, all CGI features PHP can be implemented, and support almost all the popular database and operating system.
Created by Rasmus Lerdorf in 1994, PHP was just beginning to be a simple Perl-language program used to count visitors to his own site. It was later rewritten in C, including access to the database. Starting with personal Home Page tools (PHP Tools) in 1995, Lerdorf wrote some documents describing the program and released PHP1.0. In this early version, the guest message book, guest counter and other simple functions are provided. More and more Web sites later used PHP, and strongly asked to add some features, such as loop statements and array variables, after the new members joined the development ranks, in 1995 years, PHP2.0 released. The second edition is named PHP/FI (Form interpreter). Php/fi added support for MySQL and built PHP's position on Dynamic web development. By the end of 1996, there were 15,000 websites using php/fi;1997, with more than 50,000 sites using PHP/FI. In the 1997 years, the third edition of the development Plan began, the development team joined Zeev Suraski and Andi Gutmans, and the third edition was named PHP3. In the 2000, PHP4.0 was introduced, which added many new features.
2008 PHP 50% for PHP only has in PHP version developed. Future PHP 5.3 will incorporate late static binding and some other enhancements. The development of PHP 6 is also underway, with the main improvements being the ability to remove register_globals, magic quotes, and Safe mode.
Features of PHP
1. Open Source code:
All of the PHP source code is actually available.
2, PHP is free of charge.
PHP itself is free compared to other technologies.
3, PHP's quick
The program develops fast, runs fast, and the technology itself learns fast. Embed HTML: Because PHP can be embedded in HTML language, it is easier to edit, more practical and more suitable for beginners than other languages.
4, the cross-platform of Strong:
Since PHP is a script running on the server side, it can run under UNIX, LINUX, and Windows.
5. High efficiency:
PHP consumes a fairly small amount of system resources.
6. Image processing:
Create images dynamically with PHP
7, facing the image:
In PHP4,PHP5, the object-oriented aspect has been greatly improved, now PHP can be used to develop large-scale commercial programs.
8, professional focus;
PHP supports scripting languages and is the same Class C language.
Application of PHP
1, pseudo-static
2. Static page generation
3. Database Cache
4. Process Cache
5, DIV+CSS Standard
6. Heavy Load
7. Distributed
8. jquery Framework Integration
9. Flex
10. Application of Desktop Program

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