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phalcon1.3.0开发文档

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phalcon文档

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phalcon1.3.0框架开发文档，Phalcon 是开源、全功能栈、使用 C 扩展编写、针对高性能优化的 PHP 5 框架。开发者不需要学习和使用 C 语言的功能，因为所有的功能都以 PHP 类的方式暴露出来，可以直接使用。 Phalcon 也是松耦合的，可以根据项目的需要任意使用其他对象。

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我们的动机（Our motivation）¶

There are many PHP frameworks nowadays, but none of them is like Phalcon

(Really, trust us on this one).

Almost all programmers prefer to use a framework. This is primarily because it

provides a lot of functionality that is already tested and ready to use, therefore

keeping code DRY (Don’t Repeat Yourself). However, the framework itself

demands a lot of file inclusions and hundreds of lines of code to be interpreted

and executed on each request from the actual application. Object-Oriented

frameworks also add a lot of overhead to execution making complex

application slow. All these operations slows the application down and

subsequently impacts the end user experience.

问题（The Question）¶

Why can’t we have a robust framework with all of its advantages but with

none or very few disadvantages?

This is why Phalcon was born!

During the last few months, we have extensively researched PHP’s behavior,

investigating areas for significant optimizations (big or small). Through this

understanding, we managed to remove unnecessary validations, compacted

code, performed optimizations and generated low-level solutions so as to

achieve maximum performance from Phalcon.

为什么？（Why?）¶

 The use of frameworks has become mandatory in professional

development with PHP

 Frameworks offer a structured philosophy to easily maintain projects

writing less code and making work more fun

 We love PHP and we think it can be used to create larger and more

ambitious projects

PHP 内部是如何运作的？（Inner workings of

PHP?）¶

 PHP has dynamic and weak variable types. Every time a binary

operation is made (ex. 2 + “2”), PHP checks the operand types to

perform potential conversions

 PHP is interpreted and not compiled. The major disadvantage is

performance loss

 Every time a script is requested it must be first interpreted

 If a bytecode cache (like APC) isn’t used, syntax checking is performed

every time for every file in the request

传统的 PHP 框架如何工作？（How do traditional

PHP frameworks work?）¶

 Many files with classes and functions are read on every request made.

Disk reading is expensive in terms of performance, especially when the

file structure includes deep folders

 Modern frameworks use lazy loading (autoload) to increase

performance (for load and execute only the code needed)

 Some of these classes contain methods that aren’t used in every

request but they’re loaded always consuming memory

 Continuous loading or interpreting is expensive and impacts

performance

 The framework code does not change very often, and yet an

application needs to load and interpret it every time a request is made

PHP C 扩展如何工作？（How does a PHP C-

extension work?）¶

 C extensions are loaded together with PHP one time on the web

server’s daemon start process

 Classes and functions provided by the extension are ready to use for

any application

 The code isn’t interpreted because is already compiled to a specific

platform and processor

Phalcon 如何工作？（How does Phalcon work?）¶

 Components are loosely coupled. With Phalcon, nothing is imposed on

you: you’re free to use the full framework, or just some parts of it as a

glue components.

 Low-level optimizations provides the lowest overhead for MVC-based

applications

 Interact with databases with maximum performance by using a C-

language ORM for PHP

 Phalcon directly accesses internal PHP structures optimizing execution

in that way as well

为什么需要 Phalcon？（Why do I need

Phalcon?）¶

Each application requirements and tasks are different than another’s. Some

for instance are designed to do a set of tasks and generate content that rarely

changes. These applications can be created with any programming language

or framework. Using a front-end cache usually makes such an application, no

matter how poorly designed or slow it might be, perform very fast.

Other applications generate content almost immediately that changes from

request to request. In this case, PHP is used to address all requests and

generate the content. These applications can be APIs, discussion forums with

high traffic loads, blogs with a high number of comments and contributors,

statistic applications, admin dashboards, enterprise resource planners (ERP),

business-intelligence software dealing with real time data and more.

An application will be as slow as its slowest component/process. Phalcon

offers a very fast yet feature rich framework that allows developers to

concentrate on making their applications/code faster. Following proper coding

processes, Phalcon can deliver a lot more functionality/requests with less

memory consumption and processing cycles.

结束语（Conclusion）¶

Phalcon is an effort to build the fastest framework for PHP. You now have an

even easier and robust way to develop applications with a framework

implemented with the philosophy “Performance Really Matters”! Enjoy!

框架基准测试（Framework

Benchmarks）¶

In the past, performance was not considered one of the top priorities when

developing web applications. Reasonable hardware was able to compensate

for that. However when Google@decided@to take site speed into account in the

search rankings, performance became one of the top priorities alongside

functionality. This is yet another way in which improving web performance will

have a positive impact on a website.

The benchmarks below, show how efficient Phalcon is when compared with

other traditional PHP frameworks. These benchmarks are updated as stable

versions are released from any of the frameworks mentioned or Phalcon itself.

We encourage programmers to clone the test suite that we are using for our

benchmarks. If you have any additional optimizations or comments

please@write us.@Check out source at Github

怎样的测试环境？（What was the test

environment?）¶

APC@intermediate code cache was enabled for all frameworks. Any Apache

mod-rewrite feature was disabled when possible to avoid potentially additional

overheads.

The testing hardware environment is as follows:

 Operating System: Mac OS X Lion 10.7.4

 Web Server: Apache httpd 2.2.22

 PHP: 5.3.15

 CPU: 2.04 Ghz Intel Core i5

 Main Memory: 4GB 1333 MHz DDR3

 Hard Drive: 500GB SATA Disk

PHP version and info:

APC settings:

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