PHP如何执行定时任务,让其去执行一个文件或者是访问一个URL地址
crontab可以行。但是虚拟主机是无法进入shell的。有什么办法可以解决吗
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PHP如何执行定时任务,让其去执行一个文件或者是访问一个URL地址
crontab可以行。但是虚拟主机是无法进入shell的。有什么办法可以解决吗
楼上有提到swoole的常驻内存的方式,类似的yaf,workman...都不行。
因为别人是在虚拟主机,跟本不能安装swoole拓展,sae可以用yaf,没有使用过,不知道威力怎么样。
题主这样的情况,我建议还是搞个第三方的来定时访问比较好,实在不行,就用自己的电脑定时去触发你的PHP方法。
虽然有各种奇巧淫技,不过推荐比较实际的做法,还是找一个有服务器的朋友,写一个crontab,定时访问你的一个线上地址来执行任务就行了。
现在推荐使用swoole搭配任务来处理定时和异步任务,可以参见:https://github.com/osgochina/swoole-crontab
这个可以写一个脚本,长期执行。外层是一个while(true) ,内部判断当前是否是可执行任务的时间,如果是,则运行你的定时任务。如果否,则sleep一段时间,几秒钟到一分钟不等,视业务需求。
其实就是用轮询的方式模拟crontab而已。

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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