我们知道很多开源软件的无限分类都是采用递归的算法,但是我们知道递归即浪费时间,又浪费空间(内存),上次我也分享了个我自己原创的无限分类生成树的方法,一热心php高手网友给我提出了宝贵的建议,我测试了一下,这段代码的时间非常之短参考: http://www.oschina.net/code/snippet_98719_11296,我再次整理了一下,发现数据库查询出数据之后,我们就已经定好了键值,因而实践中,我们一般会在model中查询出格式化成主键值对应数据的形式,因而我们可以直接用这样的数据,就少了一层循环。代码也非常简洁。原来的代码:function genTree($items,$id='id',$pid='pid',$son = 'children'){ $tree =&
简介:我们知道很多开源软件的无限分类都是采用递归的算法,但是我们知道递归即浪费时间,又浪费空间(内存),上次我也分享了个我自己原创的无限分类生成树的方法,一热心php高手网友给我提出了宝贵的建议,我测试了一下,这段代码的时间非常之短参考: http://www.oschina.net/code/snippet_98719_11296,我再次整理了一下,发现数据库查询出数据之后,我们就已经定好了键值,因而...
简介:如何使用php实现无限分类
简介:这篇文章主要介绍了PHP递归遍历多维数组实现无限分类的方法,涉及PHP递归操作遍历数组的相关技巧,在联动菜单及父子栏目设计等方面非常具有实用价值,需要的朋友可以参考下
简介:这篇文章主要介绍了php 无限分类 树形数据格式化代码,需要的朋友可以参考下
简介:文章详细讲述了php 进阶:实现无限分类,希望能给大家带来帮助!
6. 生成无限分类的结构
简介:生成无限分类的结构 public function get_tree_1(array $list = array()){$root = array();$node = array();foreach ($list as $k => $v) {list($id, $pid, $name, $path) = array_values($v);$node[$id] = $v;if(isset($ ...
简介:laravel无限分类怎么做啊?谁有离线laravel手册chm的?
8. thinkphp数组合并
Introduction: The problem encountered when doing infinite classification is to read out all the third-level directories contained in the first-level directory according to the ID of the first-level directory. After the foreach loop reads out, there are 5 arrays. How can this be done? To merge into an array, I used the array_merge() function, but the result was still 5 arrays and the merge was not successful. {...
9. javascript - Ask about the wheel of infinite classification UI
Introduction: The background has been There is a set of complete database unlimited classification databases and programs, but I have not found a beautifully displayed UI with unlimited classification. I wonder if there are wheels in this area? It is best to include a drop-down menu
10. PHP unlimited classification function
Introduction::This article mainly introduces PHP infinite classification function, students who are interested in PHP tutorials can refer to it.
[Related Q&A Recommendations]:
thinkphp - PHP infinite classification requires extremely slow transformation speed
php How to simplify infinite classification?
mysql - Re-research this problem: How to reorder the subcategories of unlimited categories in php
#php - Mysql In length problem?
The above is the detailed content of 10 articles about unlimited classification recommendations. For more information, please follow other related articles on the PHP Chinese website!

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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