Article Introduction：Analysis of efficient crawler technology: How Java elegantly obtains web page data Introduction: With the rapid development of the Internet, a large amount of data is stored in various web pages on the network. For developers, obtaining this data is a very important task. This article will introduce how to use Java to write efficient crawler programs to help developers obtain web page data quickly and elegantly, and provide specific code examples so that readers can better understand and practice. 1. Understand the HTTP protocol and web page structure. First, we need to understand the HTTP protocol and web page structure.

2024-01-05 comment 0  886

Article Introduction：PHP connects Baidu Wenxin Yiyan API to obtain data sorting and paging processing methods for specific types of sentences. With the development of the Internet, people's demand for obtaining various types of data is also increasing. When developing a website or application, we often need to use APIs to obtain specific types of data. This article will introduce how to use PHP to connect to Baidu Wenxin Yiyan API to obtain data of specific types of sentences, and sort and paginate the data. 1. Register a Baidu developer account and create an application. Before using Baidu Wenxin Yiyan API, I

2023-08-12 comment 0  1245

Article Introduction：Java crawler practice: How to efficiently crawl web page data Introduction: With the rapid development of the Internet, a large amount of valuable data is stored in various web pages. To obtain this data, it is often necessary to manually access each web page and extract the information one by one, which is undoubtedly a tedious and time-consuming task. In order to solve this problem, people have developed various crawler tools, among which Java crawler is one of the most commonly used. This article will lead readers to understand how to use Java to write an efficient web crawler, and demonstrate the practice through specific code examples. 1. The base of the reptile

2024-01-09 comment 0  1329

Article Introduction：Accessors and modifiers in PHP: Creating efficient data processing processes In PHP development, acquirers (Accessors) and modifiers (Mutators) are powerful data processing tools. By using them, we can easily access the attributes of the class, achieve data acquisition and modification, and also perform some additional logical processing. This article will introduce the concepts and usage of getters and modifiers, and provide specific code examples to help readers deeply understand and apply this feature. 1. Get the

2023-12-23 comment 0  569

Article Introduction：PHP connects Baidu Wenxin Yiyan API to obtain data analysis and statistical methods for specific types of sentences. Introduction: In the field of data analysis and statistics, obtaining a large number of data sources is a very important step. For the analysis of text data, it is often necessary to obtain a certain amount of data from the Internet. This article will introduce how to use PHP language to connect to Baidu Wenxin Yiyan API to obtain data of specific types of sentences, and provide corresponding data analysis and statistical methods. 1. Introduction to Baidu Wenxin Yiyan API Baidu Wenxin Yiyan API is an open source that provides sentence data.

2023-08-26 comment 0  857

Article Introduction：Advanced PHP technologies include: magic methods (processing events), generators (effectively traversing collections), closures (passing anonymous functions), anonymous classes (quickly creating classes), and attributes (adding methods and properties). Practical case: Use a generator to create a pager and obtain a large number of data collections in batches.

2024-06-04 comment 0  1032

Article Introduction：How to use PHP crawler to crawl API interface data? As an efficient data scraping tool, crawlers are often used to extract valuable data from Web pages. In actual development, we often need to obtain API interface data through crawlers for subsequent data analysis and processing. This article will introduce how to use PHP crawler classes to crawl API interface data, and attach corresponding code examples. Determine the target API interface. Before starting, we first need to determine the API interface we want to crawl, including the URL of the interface,

2023-08-07 comment 0  1491

Article Introduction：1. Common paging types Traditional: Using the traditional paging method, you can clearly obtain data information, such as how many pieces of data there are, how many pages to display, etc. Drop-down: Using the drop-down paging method, it is generally impossible to obtain clear information related to the number of data, but after the paging operation, you can still see the previously queried data. 2. Paging query logic intpageSize=100;intcurrentPageLength=0;intpageIndex=0;ExecutorServiceexe=newFixedThreadPool(Runtime.getRuntime().availableProcessors(

2023-04-18 comment 0  1280

Article Introduction：php分页可利用表格来分页类。* 在新建对象时需要的变量：$query(从数据表中获取记录数的sql语句)，$page(当前页码)，$maxline(每页几行))* 1、showpage方法：如果上面创建对象

2016-06-13 comment 0  1588

Article Introduction：How to use the PHPGoutte class library for web crawling and data extraction? Overview: In the daily development process, we often need to obtain various data from the Internet, such as movie rankings, weather forecasts, etc. Web crawling is one of the common methods to obtain this data. In PHP development, we can use the Goutte class library to implement web crawling and data extraction functions. This article will introduce how to use the PHPGoutte class library to crawl web pages and extract data, and attach code examples. What is Gout

2023-08-09 comment 0  1461

Article Introduction：This article describes a method for storing hierarchical data, such as categories and subcategories, in PHP/MySQL using an adjacency list model. It presents a one-pass data retrieval algorithm that efficiently fetches hierarchical data with a single

2024-10-23 comment 0  656

Article Introduction：How to get the current page number when paging an array in PHP: use $_GET['page'] to get the page number specified in the URL. Convert it to an integer and set a default value of 1. Calculate offset to page data. Use the array_slice() function to page the array.

2024-05-01 comment 0  429

Article Introduction：Controlling the number of items displayed on each page is very important for PHP array paging. By setting the $perPage variable, you can control the number of elements per page. The code first obtains the array, sets the number of items displayed on each page, calculates the total number of pages, obtains the current page number, and then obtains the data of the current page through array_slice() and outputs it. At the same time, paging navigation links can be generated, and links to different pages can be generated based on the total number of pages.

2024-04-30 comment 0  1361

Article Introduction：How to use the PHPCurl class library to write an efficient crawler program? Abstract: Crawler programs can be used to obtain data from web pages to achieve automated processing in various scenarios. This article will introduce how to use the PHPCurl class library to write efficient crawler programs and provide relevant code examples. Introduction: With the increasing popularity of the Internet, we deal with a large number of web pages every day. Sometimes, we need to obtain some useful data from the network, then we need to use a crawler program. A crawler program is an automated method of collecting data.

2023-08-07 comment 0  1090

Article Introduction：PHP functions can be classified by purpose: core functions perform basic tasks; user-defined functions extend functions; extension functions add task-specific functions. In actual combat, PHP functions can be used to efficiently process data, such as obtaining user names, finding the maximum age, grouping users by city, etc.

2024-04-13 comment 0  790

Article Introduction：How to use PHP to implement paging function In web development, we often encounter the need for paging for data display. As a popular server-side scripting language, PHP provides a wealth of functions and operators, which can easily implement paging functions. This article will introduce how to use PHP to implement paging function and provide relevant code examples. Obtaining the total data volume Before performing paging operations, you first need to know the total data volume. Normally, we can obtain the total number of data items by querying the database or other data sources. For example, suppose we start with

2023-08-17 comment 0  1545

Article Introduction：使用PHP的cURL库可以简单和有效地去抓网页。你只需要运行一个脚本，然后分析一下你所抓取的网页，然后就可以以程序的方式得到你想要的数据了。无论是你想从从一个链接上取部分数据，或是取一个XML文件并把其导入数据库，那怕就是简单的获取网页内容，cURL 是

2016-06-06 comment 0  937

Article Introduction：Paging in php uses commands such as database query commands, LIMIT commands, COUNT commands, ceil functions, $_GET variables, and paging styles. 1. Database query command, use SQL query statements to obtain the required data from the database; 2. LIMIT command, used to specify the number of records displayed on each page; 3. COUNT command, you can obtain the table through SELECT COUNT(*) FROM table_name The total number of records in; 4. ceil function, used for rounding up, etc.

2023-08-01 comment 0  1344

Article Introduction：How to use PHP functions for web crawling and data collection? With the rapid development of the Internet, more and more websites and web pages contain all kinds of data we need. Web crawlers and data collection have become a common means for us to obtain this data. In this article, I will introduce how to use PHP functions for web crawling and data collection, and give relevant code examples. Basic principles of web crawlers Web crawlers are the process of obtaining the required data by simulating network requests, requesting and parsing web page content. PHP provides many functions

2023-07-25 comment 0  1267

Article Introduction：With the continuous development of Internet technology, the development of Web applications is becoming more and more important. In Web applications, data display and paging are one of the traditional requirements. How to achieve fast paging of data is the key to web application performance and user experience. In PHP, arrays are commonly used data types. This article will introduce how to use PHP arrays to implement fast paging functionality. 1. Data preparation First, we need to get the data from the database or other data sources and store it in a PHP array. Suppose we have array $ containing 100 records

2023-05-24 comment 0  1058