Detailed explanation of the advantages and disadvantages of PHP

This article briefly summarizes the 10 advantages and 3 disadvantages of PHP. They are all personal insights and summaries of PHP development. Nothing is perfect, and the PHP programming language is no exception. It has advantages and disadvantages. Friends who are interested in the advantages and disadvantages of PHP can refer to it.

1. Advantages

1. Cross-platform, superior performance, 45% better performance when combined with Linux/Unix rather than Windows, and combined with many free platforms It is very economical, such as the combination of LAMP (Linux/Apache/Mysql/PHP) or FAMP (FreeBSD/Apache/Mysql/PHP), or if the data application is large enough, you can consider changing to PostgreSQL or Oracle, which supports N types of databases. (N >= 10)

2. The syntax is simple, if you have learned C and Perl, it is easy to get started, and it is partially similar to ASP. There are mature development tools, such as NuPHPed, or Zend Studio, etc., and you can use Eclipse and so on under the Linux platform.

3. Currently, mainstream technologies are supported, such as WebService, Ajax, XML, etc., which are sufficient for application.

4. There is relatively complete support, such as using ADODB or PEAR::DB as the database abstraction layer, using Smarty or smart template as the template layer. If it is PHP 5.1, you can also use PDO (PHP Data Object ) to access the database.

5. There are many mature frameworks, such as the framework that supports MVC: phpMVC, the framework that supports event-driven events like ASP.net: Prado, the framework that supports rapid development like Ruby On Rails: Cake, etc., Sufficient for your application needs.

6. PHP 5 already has a mature object-oriented system that can adapt to basic object-oriented requirements. Suitable for developing large-scale projects.

7. There is a mature community to support PHP development.

8. Currently, many large-scale applications use PHP, such as Taobao, Yahoo, 163, Sina and other large portals. Many use PHP as their development language, so large portals can choose it. I think it's enough for your use.

9. There are many open source frameworks or open source systems that can be used. For example, the well-known open source frameworks include Zend Framework, CakePHP, CodeIgniter, symfony, etc., open source forums include Discuz!, Phpwind, etc., and the open source blog WordPress, Open source online store systems such as Ecshop, ShopEx, etc., and open source SNS systems such as UCHome, ThinkSNS, etc.

10. Low cost of use (linux apache mysql php kernel)

2. Disadvantages

1. The support for multi-threading is not very good, and the Most of the time we can only implement it through simple simulation.

2. The syntax is not very strict. For example, variables can be used without being defined. In c, java, and c++, variables must be defined before they can be used.

3.PHP’s interpretation and operation mechanism. This operating mechanism enables all related resources to be recycled after each PHP page is interpreted and executed. In other words, PHP has no way to make an object resident in memory at the language level. In PHP, all variables are page-level. Whether they are global variables or static members of the class, they will be cleared after the page is executed. Take JSP as an example. In JSP, the scope of Java Bean has four valid values: Page, Application, Session, and Request, which correspond to the four lifetimes of page, program, session, and request respectively. But in PHP, there is only one lifetime of Page.

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