php比asp优秀的七个理由
ASP是微软公司实现动态网页的一种技术。ASP支持一些脚本语言,主要以VBScripp为主。与ASP相比较,你还可以选择另一中开放源代码编程语言——PHP,PHP可以运行在多种操作系统下,其中包括linux和windows。
虽然ASP是一种不错的技术,但从长远考虑我相信PHP在将来的技术领域里会有不凡的表现。
我认为有七个理由可以说明PHP比ASP更优秀:
1、速度、速度、速度
当我第一次运行PHP脚本程序时,我不禁对自己说:“太快了”,当时我是在仪态166MHZ的机器上运行我的程序的,但运行的速度仍然很快。
ASP是永远也不会象PHP这样快的,因为ASP是建立在COM体系结构之上的。当用VBScript写ASP脚本时,实际上实在使用COM的对象,当向用户浏览器发送信息时,它用的是Response对象的write方法,当它访问数据库和文件系统的时候,它用的是其他的COM对象。这些COM对象的使用使运行速度下降。
在PHP代码中,所有的工作都运行在PHP的内存空间中,也就是说PHP不是基于COM对象的,所以的他的运行速度会快一些。
下面是我们在MSSQL7 40次运行一个查询语句的执行时间统计:
PHP Querying MSSQL7 时间(秒)
用 MSSQL extension 01.88
用 ODBC extension 09.54
用 ODBC via COM (ADO) 17.28
用OLEDB via COM 06.19
当我们使用PHP.ODBC,访问数据库用了9.54秒,而用COM接口去连接数据库需要比PHP所用的时间高80%。
OLEDB是微软的一种高速访问数据库的技术,他比ODBC要快。但当我们所PHP和OLEDB的效率实验时,结果是PHP的整体性能比OLEDB高200%,如此的出一个结论,如果不采用COM可以获得较快的执行速度。
当然PHP的执行速度还不是最快的,但我们才刚刚开始起步,我们会逐步的完善他,而且PHP是一种开放源代码编程语言,世界上许多程序员在不断的完善他的技术,相信他一定会比非开放源代码系统获得更高的执行速度的。
2、高级内存管理
在IIS4下,一个ASP脚本header.asp,如果被20个页面所包含,那么运行的时候,在内存当中会保留这20个header.asp的编译副本,IIS5解决了这个问题,但只有windows2000才支持IIS5,由于这种IIS5的不能向下兼容的原因,许多服务器仍然要使用IIS4下的低级的内存管理。
而在PHP中,不会存在这种问题,只有当require时,才会调用某个include文件。
3、没有后顾之忧
我非常憎恨的一件事情就是会买到一件不放心的产品,比如当你买了一辆汽车,但由于发动机是坏的,你需要更换他;当你买了一栋房子的时候,你要去修补漏雨的屋顶。
那么ASP旧乡这些产品一样,当你买了ASP之后,如果你需要加密技术,你就要买ASPEncrypt;当你需要Email管理时,你就要买ServerObjets Qmail;当你需要文件上传时,你还要买Artisans SA-FileUp.
4、MySQL使PHP更精彩
PHP与MySQL的组合既简单又精彩。PHP有许多管理和维护MySQL的工具,对MySQk的支持是最全面的。许多有用的函数如mysql_insert_id和mysql_affected_rows等,其他的数据库则没有。
ASP和PHP都是中型网站的较理想的解决方案,但PHP与MySQL的紧密结合使PHP更加优越。
MySQL的虚度比Microsoft access速度快,Mssql和Oracle速度比MySQL要快,可是费用较高。
5、java和C++的变成风格
这个优点只是一个看法。
我知道你不会相信一个Visual Basic程序员会因为PHP有Java和C++的编程风格而转向使用PHP,但你会相信有许多人还是喜欢Java和C++的,PHP是一种具有这两种语言的编程风格的较容易学习的语言。
PHP支持结构化编程,在VB因为他的继承性使用类还是较少的。而PHP的象Java和C++一样的继承性使一个大型的程序中到处都充满了类的影子。
6、Bug的处理
你是否曾经要求Microsoft修改ASP的一些Bug呢?如果你不是一个象Boeing一样的组织,你无法获得迅速而恰当的修改,把么当你遇到Bug而停止工作时,如果这个Bug不修改,你将无法继续你的工作的。
PHP,当你发现Bug时,你可以修改他,如果你没有专家的水平,你可以请专家修改,并且你的修改会得到开放代码组织的接受和认可。
7、移植性
Microsoft经常修改ASP,下一版本叫ASP+,现在已经开始测试。我相信他们会修改许多我曾经提到过的问题。但也无庸质疑的,Microsoft会将你限制在他们的产品范围之内的。
我曾经是一个苹果机的程序员,当windows95问世后,我开始转变,但许多原来的代码都无法在windows95下运行,这些代码现在被放在一边,我非常的遗憾。所以我不希望在windows下再出现这样的悲剧。
不要忘记Novell曾经也象Microsoft的网络操作系统一样热及一时,但现在已经没有许多人用了,那么Microsoft也会这样的。
我找到了PHP,我仍旧在windows下工作,但我知道PHP代码可以运行在Solaris、Linux和许多其他的操作系统中,我的心里感到安慰。

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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