Almost 70% of all open source applications are written in LAMP. Major giants like Yahoo, Twitter, Facebook etc; make use LAMP for developing most of their applications. LAMP is the most dominating platform for web (client/server) development, and there is a very good reason for that. There are possibly 1000’s or more open source frameworks, which significantly simplify the overall development time. Also they are very highly featured.
Though PHP code may look cryptic at first but it is really simple to code. Also there is a framework for every web development; you will end up coding very few lines of code.
Dynamic Language paradigm: It should be pointed out that PHP is dynamic programming language.Being a Dynamic language as compared to a Static language like C++, JAVA or C# has certain advantages when it comes to development of Database driven Applications in terms of the overall memory consumption. Compiler does most of the calculation of allocating the memory to Types based on its usage.It is so significant that Microsoft added “System. Dynamic” namespace in its .NET 4.0 to support Dynamic Type based specification for C#, VB.NET and other .NET supported languages. Oracle too added dynamic language support in Java Runtime by introducing Groovy and Grails(web) framework.
The reason why LAMP has been so successful over the years is the huge community of Open Source developers. There are thousands of free open source applications which suits almost any need. Applications like Joomla, Drupal for Content Management system, Wordpress for blog, etc. Not only that. Even after being an open platform it is stable as it is years in the making and there are millions of developers to support it. However, being an open platform, you will have to take care of security vulnerabilities. All and all, this is the most matured platform for web (Client/Server) development. Every major technology in web development like URL routing, HTTP compressions, ETag caching etc; are first implemented on LAMP and later ported to other platforms like JAVA and .NET/MONO.