Article Introduction：Code sharing for PHP multi-threading class

2016-07-25 comment 0  813

Article Introduction：Implementation code for PHP multi-threaded batch collection and downloading of images

2016-07-25 comment 0  1104

Article Introduction：can you feel the love tonight: can you feel the love tonight PHP curl simulates the browser to collect Alibaba's implementation code: there is no way but not to do it, haha. Copy the code as follows: <?php set_time_limit(0); function _rand( ) { $length=26; $chars = "0123456789abcdefghijklmnopqrstuvwxyz"; $max = strlen($chars) - 1; mt_sra

2016-07-29 comment 0  1044

Article Introduction：python multi-threading: python multi-threading PHP multi-thread web page crawling implementation code: limited by the PHP language itself does not support multi-threading, so the efficiency of developing crawler programs is not high. At this time, you often need to use Curl Multi Functions which can achieve concurrent multi-threading Access multiple URL addresses. Since Curl Multi Function is so powerful, can you use Curl Multi Functions to write concurrent multi-threaded file downloads? Of course you can. My code is given below: Code 1: Write the obtained code directly into a file. Copy the code as follows: <?php

2016-07-29 comment 0  1103

Article Introduction：curl:curl turns on the CURL extension, allowing the server to support remote collection of PHP curl functions: curl(), file_get_contents(), snoopy.class.php, the three tools used in remote page crawling or collection, are still intrusive. Use snoopy.class.php because it is more efficient and does not require server-specific configuration support. It can be used in ordinary virtual hosts. file_get_contents() is slightly less efficient. In common failure situations, curl() is very efficient. Supports multi-threading, but needs to enable curl extension. The following are the steps to enable curl extension:

2016-07-29 comment 0  961

Article Introduction：The difference between nts and ts in php: ts means thread safety, and a locking mechanism is used for multi-thread access. When one thread accesses certain data of this class, other threads cannot access it at the same time; while nts means non-thread safety and does not provide threads. Access protection, multiple threads can operate on the same data at the same time.

2022-02-21 comment 0  4005

Article Introduction：:This article mainly introduces wecenter-enable CURL extension to enable the server to support remote collection of PHP curl function. Students who are interested in PHP tutorials can refer to it.

2016-07-30 comment 0  1020

Article Introduction：Introduction to concurrent collections Java concurrent collections are a set of collection classes in the Java language specifically designed for multi-threaded programming. They provide thread-safe and efficient collection operations, which can effectively avoid various problems that occur when multiple threads access collections concurrently, such as data Competition, deadlock, etc. Concurrent collections mainly include the following important classes: java.util.concurrent.ConcurrentHashMap: a thread-safe hash table that allows concurrent reading and writing. java.util.concurrent.ConcurrentLinkedQueue: Thread-safe linked list queue that allows concurrent enqueueing and dequeueing. java.util.concurrent.Cop

2024-02-19 comment 0  1045

Article Introduction：cURL is a powerful PHP library. Using PHP's cURL library, you can simply and effectively crawl web pages and collect content. Set cookies to simulate logging in to web pages. Curl provides a wealth of functions. Developers can get more from the PHP manual. Information about cURL.

2018-04-03 comment 0  1632

Article Introduction：PHP can use Curl to complete various file transfer operations, such as simulating a browser to send GET, POST requests, etc. However, because the PHP language itself does not support multi-threading, the efficiency of developing crawler programs is not high. However, you can use Curl. With the help of Curl, The function enables concurrent multi-threaded access to multiple URL addresses to enable concurrent multi-threaded crawling of web pages or downloading files.

2018-06-11 comment 0  1987

Article Introduction：Concurrent collections are thread-safe collections that can be operated by multiple threads simultaneously without data inconsistency or corruption. They are the foundation for building high-performance parallel applications. Java provides a wealth of concurrent collection classes, including: ConcurrentHashMap: Thread-safe hash table CopyOnWriteArrayList: Thread-safe array list BlockingQueue: Thread-safe queue ConcurrentSkipListSet: Thread-safe skip list collection Select the appropriate collection type Select the appropriate concurrent collection Type matters. Consider the following: Type safety: Do the types of elements in the collection need to be safe? For example, Concurrent

2024-04-03 comment 0  1154

Article Introduction：This article mainly introduces the method of foreach combined with curl to realize multi-threading in PHP. It analyzes the principles and implementation techniques of foreach statement combined with curl loop call to simulate multi-threading in the form of examples. Friends who need it can refer to it.

2018-06-01 comment 0  1610

Article Introduction：This article mainly introduces the method of foreach combined with curl to implement multi-threading in PHP. It analyzes the principles and implementation techniques of foreach statement combined with curl loop call to simulate multi-threading in the form of examples. Friends who need it can refer to it.

2016-12-21 comment 0  1261

Article Introduction：cURL is a powerful PHP library. Using PHP's cURL library, you can simply and effectively crawl web pages and collect content. Set cookies to simulate logging in to web pages. Curl provides a wealth of functions. Developers can get more from the PHP manual. Information about cURL. This article takes simulated login to open source China (oschina) as an example to share with you the use of cURL. PHP curl...

2016-11-10 comment 0  1311

Article Introduction：For websites with restricted IP addresses and sources, it is not possible to use normal collection methods. This article will introduce a method to use PHP's curl class to simulate IPs and sources, and collect websites with restricted IPs and sources. 1. Set the page to restrict ip and source access to server.php<?php $client_ip = getip();$referer = getreferer(); $allow_ip = '192.168.1.100';$allow_

2017-07-26 comment 0  1820

Article Introduction：In the process of distributed large-scale data collection, the management of information sources is particularly important. In order to ensure that the same task can only be processed by one collector at the same time, the uniqueness of task scheduling must be ensured. Usually when we carry out distributed data collection, there will usually be a scheduling module, whose main responsibility is to distribute the collection tasks and ensure the uniqueness of the tasks. Because it is distributed, it involves multiple servers (multiple machines), each server involves multiple collectors (multiple processes), and each collector may involve multiple threads. Therefore, the lock in the task scheduling module Mechanism is particularly important. Generally speaking, the lock implementation method may have the following types according to the application implementation architecture: If the handler is single-process and multi-threaded, in p

2023-05-28 comment 0  688

Article Introduction：SpringDataRedis calls the underlying interpretation of Redis. Before SpringBoot2. Pool; BIOlettuce: Netty is used as the bottom layer, and instances can be shared between multiple threads. There is no thread insecurity and the number of threads can be reduced; NIO SpringBoot integrates Redis (source code analysis). All SpringBoot configuration classes have an automatic configuration class. Automatic configuration classes will be bound to a p

2023-05-29 comment 0  1074

Article Introduction：Java provides thread-safe collection classes to solve inconsistency problems caused by multi-threaded concurrent data access, including ConcurrentHashMap (thread-safe hash table), ConcurrentLinkedQueue (thread-safe linked list), CopyOnWriteArrayList (thread-safe list) and ConcurrentSkipListSet (thread-safe skip list) ). These collection classes ensure data consistency and are easy to use by providing atomic operations and good concurrency performance.

2024-04-11 comment 0  768

Article Introduction：Overview of Concurrent Collections Java concurrent collections are part of the Java collections framework and are optimized for multi-threaded environments. These collections provide thread-safe data structures that allow multiple threads to access and modify data simultaneously without worrying about race conditions and data corruption. Concurrent collection types Java concurrent collections contain multiple types, including: ConcurrentHashMap: a thread-safe hash table that provides fast lookup and insertion operations. ConcurrentLinkedQueue: A thread-safe queue that supports efficient FIFO operations. ConcurrentSkipListSet: A thread-safe skip list collection that provides fast lookups and ordered iteration. Atom

2024-04-03 comment 0  601

Article Introduction：PHP can use Curl to complete various file transfer operations, such as simulating a browser to send GET, POST requests, etc. However, because the PHP language itself does not support multi-threading, the efficiency of developing crawler programs is not high, so it is often necessary to use Curl Multi Functions. The function enables concurrent multi-threaded access to multiple URL addresses to enable concurrent multi-threaded crawling of web pages or downloading files.

2016-12-21 comment 0  908