Home Backend Development PHP Tutorial Linux crontab 访问PHP URL完成定时任务

Linux crontab 访问PHP URL完成定时任务

Jun 20, 2016 pm 12:45 PM

crontab -e 新建/编辑一个任务
crontab -l 列出所有任务

crontab 格式:

基本格式 :
分钟 小时 日 月 星期 命令
第1列表示分钟1~59 每分钟用或者 /1表示
第2列表示小时1~23(0表示0点)
第3列表示日期1~31
第4列 表示月份1~12
第5列标识号星期0~6(0表示星期天)
第6列要运行的命令

执行PHP脚本:
* * * * * /usr/bin/php -f /root/test.php >> test.log

表示“每隔一分钟执行test.php文件,脚本的结果输出到test.log里”。 注意目录问题。

比如test.php里的代码可以是echo date("Y-m-d H:i:s") \n这种。

由于我是第一次用crontab,测试发现bin/php 这种方式只能单PHP文件可以完成的任务,如果涉及到include,require,要注意路径问题,涉及到“类(class)”似乎就不行了。希望哪位指点一下。

另外需要注意这个脚本需要有执行权限。

而我本人需要完成的任务是定时访问一个文件(链接)去生成sitemap,所以访问URL就不能用bin/php 去完成,而是要用bin/curl。所以我的代码就成了下边这样:

* * * * * /usr/bin/curl http://aa.com:8080/tools/sitemap.php >> /Desktop/untitled.html

关于这个命令里后边的输出,并不是必须的,只是为了方便在写命令的时候调试。

关于crontab命令的参数建议看一下手册,这里只复制了一段查到的资料里提到的。

本站@Jacendfeng 的这篇Linux 下执行定时任务 crontab 命令详解 写的非常详细,建议看一下。

参考资料:
鳥哥的 Linux 私房菜 -- 第十五章、例行性工作排程(crontab)
linux 自动执行 crontab学习笔记
linux定时调用指定url链接,linux crontab定时执行php脚本程序介绍
linux使用crontab实现PHP执行定时任务

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Explain the concept of late static binding in PHP. Explain the concept of late static binding in PHP. Mar 21, 2025 pm 01:33 PM

Article discusses late static binding (LSB) in PHP, introduced in PHP 5.3, allowing runtime resolution of static method calls for more flexible inheritance.Main issue: LSB vs. traditional polymorphism; LSB's practical applications and potential perfo

Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Apr 05, 2025 am 12:04 AM

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

How does session hijacking work and how can you mitigate it in PHP? How does session hijacking work and how can you mitigate it in PHP? Apr 06, 2025 am 12:02 AM

Session hijacking can be achieved through the following steps: 1. Obtain the session ID, 2. Use the session ID, 3. Keep the session active. The methods to prevent session hijacking in PHP include: 1. Use the session_regenerate_id() function to regenerate the session ID, 2. Store session data through the database, 3. Ensure that all session data is transmitted through HTTPS.

Describe the SOLID principles and how they apply to PHP development. Describe the SOLID principles and how they apply to PHP development. Apr 03, 2025 am 12:04 AM

The application of SOLID principle in PHP development includes: 1. Single responsibility principle (SRP): Each class is responsible for only one function. 2. Open and close principle (OCP): Changes are achieved through extension rather than modification. 3. Lisch's Substitution Principle (LSP): Subclasses can replace base classes without affecting program accuracy. 4. Interface isolation principle (ISP): Use fine-grained interfaces to avoid dependencies and unused methods. 5. Dependency inversion principle (DIP): High and low-level modules rely on abstraction and are implemented through dependency injection.

How to automatically set permissions of unixsocket after system restart? How to automatically set permissions of unixsocket after system restart? Mar 31, 2025 pm 11:54 PM

How to automatically set the permissions of unixsocket after the system restarts. Every time the system restarts, we need to execute the following command to modify the permissions of unixsocket: sudo...

How to debug CLI mode in PHPStorm? How to debug CLI mode in PHPStorm? Apr 01, 2025 pm 02:57 PM

How to debug CLI mode in PHPStorm? When developing with PHPStorm, sometimes we need to debug PHP in command line interface (CLI) mode...

Explain late static binding in PHP (static::). Explain late static binding in PHP (static::). Apr 03, 2025 am 12:04 AM

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

See all articles