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我要发动一场战争,我是练枪好呢还是耍剑好呢? 学Java, 然后学 Lucene,http://lucene.apache.org/core/。弱弱的问一句,Lucene也是搜索引擎吧,嘿嘿。 呵呵,这位朋友很有想法啊
不过有点可惜的是,搜索引擎的关键,并不在什么语言,而应该是在于它的算法核心
当然,算法也需要语言来表现,针对搜索算法对于性能的要求,C++应该是一个比PHP和Java更好的选择 用c++、java等等写搜索引擎都可以,关键是你要做成什么样的搜索引擎,仅仅是文档搜索还是那种互联网式的搜索引擎,还有你的数据量有多少,你要不要建立倒排索引(10万以下的索引量推荐就不要建立倒排索引了),你的爬虫要怎么写,多久更新一次索引,还有你是要支持纯英文的,还是中英文都支持的,你要是支持中文的,你得考虑你该如何对你抓下来得内容进行分词等等,所以语言什么的真的不是大问题,关键是你想做还是不想做的问题,以及想做到多好的问题 搜索引擎的规模和综合性通常大于你所说的C++,PHP,JAVA。这实际上不是一个应该讨论的问题。 推荐看udacity,他的一门CS101课就是用七周的时间从一个完全不会编程的人学会编写一个搜索引擎,用的是Python语言。有视频(需要翻墙),作业和考试。
http://www.udacity.com/overview/Course/cs101/CourseRev/apr2012 只会一种语言很难实现一个完备的搜索引擎,因为搜索引擎是个多知识领域的综合体,每一种语言都有可能有其用武之地,所以C++,Java,Python, PHP都学学吧。 可以看看开源的搜索引擎,Nutch,httpclient,lucene等东西 http://udacity.com/
看看这个吧。CS101就是写一个简易的搜索引擎。用的语言是python。视频在墙外,你懂的 。

PHP is used to build dynamic websites, and its core functions include: 1. Generate dynamic content and generate web pages in real time by connecting with the database; 2. Process user interaction and form submissions, verify inputs and respond to operations; 3. Manage sessions and user authentication to provide a personalized experience; 4. Optimize performance and follow best practices to improve website efficiency and security.

PHP uses MySQLi and PDO extensions to interact in database operations and server-side logic processing, and processes server-side logic through functions such as session management. 1) Use MySQLi or PDO to connect to the database and execute SQL queries. 2) Handle HTTP requests and user status through session management and other functions. 3) Use transactions to ensure the atomicity of database operations. 4) Prevent SQL injection, use exception handling and closing connections for debugging. 5) Optimize performance through indexing and cache, write highly readable code and perform error handling.

Using preprocessing statements and PDO in PHP can effectively prevent SQL injection attacks. 1) Use PDO to connect to the database and set the error mode. 2) Create preprocessing statements through the prepare method and pass data using placeholders and execute methods. 3) Process query results and ensure the security and performance of the code.

PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

PHP makes it easy to create interactive web content. 1) Dynamically generate content by embedding HTML and display it in real time based on user input or database data. 2) Process form submission and generate dynamic output to ensure that htmlspecialchars is used to prevent XSS. 3) Use MySQL to create a user registration system, and use password_hash and preprocessing statements to enhance security. Mastering these techniques will improve the efficiency of web development.

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.


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