在知乎上看到你碰到过的最难调的 Bug 是什么样的
大家说说自己开发中遇到的一些诡异的bug,然后怎么解决的?直接上代码比较明了
说一个我最近遇到的:
用的一个第三方库用intval转换字符串
const IOS_MIN_ID = 2200000000; $id = '2200087853'; if(intval($id) >= IOS_MIN_ID) return true;//判断始终失败
echo intval('2200087853');// 2147483647
//应该返回数字2200087853的
本地系统是64位的,但php是32位的,服务器上却没问题,于是bug了
回复内容:
在知乎上看到你碰到过的最难调的 Bug 是什么样的
大家说说自己开发中遇到的一些诡异的bug,然后怎么解决的?直接上代码比较明了
说一个我最近遇到的:
用的一个第三方库用intval转换字符串
const IOS_MIN_ID = 2200000000; $id = '2200087853'; if(intval($id) >= IOS_MIN_ID) return true;//判断始终失败
echo intval('2200087853');// 2147483647
//应该返回数字2200087853的
本地系统是64位的,但php是32位的,服务器上却没问题,于是bug了
这个 bug。意识到它的存在之后我调试过好几次,历时数月,依然不得其解,甚至打算等有空了编译调试版本的 libnotify。后来经朋友协助,研究 StackOverflow 上的回答,加粗文字反汇编查看,才终于明白原来它自从我从32位系统迁移到64位就一直存在了。
PS: 最近在 GtiHub 上很火的:danluu/debugging-stories

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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