表单$_post[]的问题
表单action指向本身所在页面
提交按钮
下面有一个判断 if($_Get['search'])
如果有值,说明点击了查询按钮,执行啥啥操作
如果没有值,仅仅显示本页面静态部分。
5.3可以运行
使用PHP5.5之后却无法显示该网页
请问解决办法吧。这是怎么回事?所有代码都需要重写?
------解决思路----------------------
$_GET[search]
不加引号。PHP首先会查找search常量,找不到所以就报错了。
如果不想改代码,可以在首行加上:error_reporting(E_ALL & ~E_NOTICE); 这句,就可以将notice错误报告屏蔽掉。
------解决思路----------------------
你可以把错误调试打开,如果是网页无法显示,应该是哪里有问题。
------解决思路----------------------
加引號這個是標準寫法。
為什麼不按標準呢。。
------解决思路----------------------
出现这个错误提示的原因,PHP会把没有引号引起来的键名当作是常量去获取, 当找不到的时候, 抛出一个NOTICE, 然后再根据“常量名”生成一个字符串, 然后再讲这个字符串做为键名继续~
可以設置error_reporting(E_ALL & ~E_NOTICE); 來屏蔽錯誤顯示。但最好還是加引號,這樣不需要在將常量轉字符去獲取多次,提高效率。
------解决思路----------------------
这与 php 版本无关,但与 php 环境设置有关
当然,随着 php 版本的升级,你受到的约束也在升级
if($_Get['search']) 将可能会产生一个 E_NOTICE 级别的错误信息
如果你没有打开错误显示,或将错误信息重定向到日志
那么由于错误信息没有出路,导致一个 HTTP 500 状态(服务器拒绝响应)
虽然屏蔽掉 E_NOTICE 级别错误检查,可以回避掉这个毛病
但隐患终究是存在的,程序是不健壮的

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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