需求:用户在后台添加文章时可以选择发布的方式:立即发布,指定时间发布。
分析:
1、数据库表设计:
ctime[int 11] 发布时间
status[tiny int 2] 发布状态,0-禁用 1-正常在用、显示 2-计划发布
2、php方法:
用户使用立即发布,则存储时status=1,前台显示只要查到status=1的就可以直接显示了
用户选择定时发布,则储存时status=2,此时前台是不显示的
写另外一个task.php文件,去表中查status=2的记录,判断ctime和当前时间,当ctime大于当前时间时,就将记录的status设置为1
3、在linux服务器上新建一个定时任务
这个定时任务每隔一段时间就去执行task.php。
假设我们每分钟去执行下文件,使用crontab来设定一个每分钟执行的任务,关于crontab使用方法,自行百度“linux crontab”
编辑系统的定时任务:
crontab -e<span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);"> </span>
*/1 * * * * curl http://www.test.com/task.php
使用crontab -l 可以查看任务列表
注意:!!!!!!!!!!!!!!!!!!
如果连接中带有参数,如:http://www.baidu.com/index.php?m=test&=test
请转义为:http://www.baidu.com/index.php?m=test\&=test
对!一定要加上反斜杠
版权声明:本文为博主原创文章,未经博主允许不得转载。

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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