首页是这样的搜索框,用户输入出发地和目的地就可以列出相关的信息,
但是后台数据库信息的表中地址是存的地区表中对应的地区id,想问有木有什么方法可以前台输入文本,后台可以搜出对应的信息呢(想了一个方法就是添加信息时把出发地和目的地的文本各存在信息表的一个字段中,然后搜索此字段,但是信息多了的话用like是否会有性能的问题.本人小白,求指教)
地区信息是全国的省市区三级
回复内容:
首页是这样的搜索框,用户输入出发地和目的地就可以列出相关的信息,
但是后台数据库信息的表中地址是存的地区表中对应的地区id,想问有木有什么方法可以前台输入文本,后台可以搜出对应的信息呢(想了一个方法就是添加信息时把出发地和目的地的文本各存在信息表的一个字段中,然后搜索此字段,但是信息多了的话用like是否会有性能的问题.本人小白,求指教)
地区信息是全国的省市区三级
这才多大个问题规模嘛。
每个省做一个JSON文件,一开始的HTML只显示省级,选择省级的时候动态加载该省的JSON文件,用于填充后两个下拉框。
http://blog.segmentfault.com/shamiao/1190000000329012
其实我一直在想:有没有人制作并维护一个json格式省市县列表的静态文件库,然后提交到staticfile.org等CDN上去呢……?
答这个问题,总要先知道你的出发地和到达地,数据量有多大个规模。请补充你的问题。
解法随着规模变化而明显必须变动。例如在300以下,最优方法一般是整体下载到客户端后JavaScript前台搜索。但多了可能就行不通,必须另想办法。

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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