I recently received a project from a teacher at the college to conduct PHP research and assist in project development. I have never been exposed to PHP before, so I want to learn about it here to get started.
1. PHP
PHP, Hypertext Preprocessor, a general open source scripting language. It absorbs the characteristics of C, Java and other languages, making it easy to get started. It is mainly used for web development. Its file suffix is php.
2. Language analysis
PHP can quickly execute dynamic web pages (dynamic web pages, that is, the URL is not the common form of static web pages such as htm, html, shtml, xml, etc., but is in the form of aspx, .asp, .jsp, .php, .perl, . cgi and other forms are suffixed, and there is an iconic symbol - "?" in the dynamic web address. ) Compared with other scripting languages, PHP can embed programs into HTML documents for execution, and the execution efficiency is very high. And PHP can directly access the database and generate dynamic web pages.
3. Development tools
The integrated development environment integrates the environments needed in the software development process, including code highlighting, code completion, debugging, and version control. Commonly used php IDEs include the following:
zend studio: commercial software, based on the Eclipse open source framework.
Eclipse PDT: open source.
4. Features
PHP’s features include: 1. PHP’s unique syntax mixes C, Java, Perl and PHP’s innovative syntax. 2. PHP can execute dynamic web pages faster than CGI or Perl - in terms of dynamic pages, compared with other programming languages, PHP embeds programs into HTML documents for execution, and the execution efficiency is higher than CGI that completely generates HTML tags. Much higher; PHP has very powerful functions, and all CGI functions can be realized by PHP. 3. PHP supports almost all popular databases and operating systems. 4. The most important thing is that PHP can be extended with C and C++!
5. Version differences
PHP4, which is too old and does not support OO, has been eliminated; PHP6 is still a concept product and is still under development.
PHP5 moderators mainly have 4 branches: versions before PHP5.2, PHP5.2, PHP5.3, and versions after PHP5.4.
Among them, PHP5.2, the previous version has incomplete functions or bugs; PHP5.4 and later versions are unstable to use.
Mainstream PHP programs are most compatible with PHP5.2. The latest version of PHP5.2 is currently 5.2.17.
If you develop and use it yourself, PHP5.3 has advantages and is a version worth considering for deployment projects.
In addition to the differences in version numbers, PHP versions with the same version number are also different, and you need to pay attention when choosing PHP extensions.
Install version: executable MSI format installation package.
ZIP version: Unzip and use. There is no difference from the install version. It is recommended to choose the ZIP version.
DEBUG version: End users don’t need to worry.
VC6 and VC9
If you are using PHP under apache1 or apache2, you should choose the VC6 version. If you are using IIS (Internet Information Services), it is a basic Internet service provided by Microsoft based on running Microsoft Windows. When using PHP under ), you should choose the VC9 version. The VC6 version is compiled with visual studio6, and VC9 is compiled with Visual Studio 2008, with improved performance and stability. The VC9 version of PHP requires you to install Microsoft 2008 C++ Runtime. Do not use the VC9 version under apache.
6. PHP installation
Since making a website requires four major pieces of LAMP or WAMP, it cannot be separated from the establishment of apache server, MySQL database application, and PHP (or other scripting languages). In this way, they need to be installed separately and the environment between them can be configured before they can be used as a whole application to build a website server.
But now there are many installation packages that integrate these necessary components. The one used here is AppServ, (other WAMPSERver, etc.) integrates AMP, and there is no need to configure a complex environment. Therefore, this software is very suitable for entry-level PHP developers.
The following introduces the installation and use of AppServ:
Download AppServ: http://www.drpeng.org/tech/index.php (a personal sharing website of a teacher in our school, there are many good things in it).
Installation process: http://jingyan.baidu.com/article/91f5db1bf72ac01c7f05e3a7.html (It should be noted that it is more appropriate to change the default installation port to 8080. Also remember the password, and log in to the user when logging in to the database under the apache server later. The name and password are root and the password you set respectively).
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