下载了一个项目的源码,运行时有很多的Notice级别的错误,于是在php.ini文件中的开启了error_reporting下的Default Value: E_ALL & ~E_NOTICE,但是发现,开启后会导致 Call to undefined function mysql_connect() 错误,连接不上数据库。开启 Development Value: E_ALL | E_STRICT
和 Production Value: E_ALL & ~E_DEPRECATED也是同样加载不了数据库模块。全都关闭的话就可以,不知各位有没有遇到过这个问题,求解~!
回复内容:
下载了一个项目的源码,运行时有很多的Notice级别的错误,于是在php.ini文件中的开启了error_reporting下的Default Value: E_ALL & ~E_NOTICE,但是发现,开启后会导致 Call to undefined function mysql_connect() 错误,连接不上数据库。开启 Development Value: E_ALL | E_STRICT
和 Production Value: E_ALL & ~E_DEPRECATED也是同样加载不了数据库模块。全都关闭的话就可以,不知各位有没有遇到过这个问题,求解~!
你这个错误跟error_reporting
选项没多大关系,只是你关闭了这个选项后它就不显示错误了,但是错误还是存在的,只是没显示出来。
从错误来看很明显是你的mysql扩展没装上,需要注意的是现在的php默认是没有装mysql扩展的了。如果你是windows,可以在php.ini里找到
;extension=php_mysql.dll
把前面的分号去掉即可,如果你是用的ubuntu,而且你的php是用的apt-get
安装的,那么可以在终端中输入
sudo apt-get install php-mysql
来安装mysql扩展。如果你是用的其它linux发行版,需要自己重新编译php,并在configure的时候加上--with-mysql=mysqlnd
不知道你下载的是什么源码,我有一次看个源码,也是这个错误,原因是他用的是PDO的方式加载的数据库,但是我没有开启PDO模块,你可以看看代码。

ThesecrettokeepingaPHP-poweredwebsiterunningsmoothlyunderheavyloadinvolvesseveralkeystrategies:1)ImplementopcodecachingwithOPcachetoreducescriptexecutiontime,2)UsedatabasequerycachingwithRedistolessendatabaseload,3)LeverageCDNslikeCloudflareforservin

You should care about DependencyInjection(DI) because it makes your code clearer and easier to maintain. 1) DI makes it more modular by decoupling classes, 2) improves the convenience of testing and code flexibility, 3) Use DI containers to manage complex dependencies, but pay attention to performance impact and circular dependencies, 4) The best practice is to rely on abstract interfaces to achieve loose coupling.

Yes,optimizingaPHPapplicationispossibleandessential.1)ImplementcachingusingAPCutoreducedatabaseload.2)Optimizedatabaseswithindexing,efficientqueries,andconnectionpooling.3)Enhancecodewithbuilt-infunctions,avoidingglobalvariables,andusingopcodecaching

ThekeystrategiestosignificantlyboostPHPapplicationperformanceare:1)UseopcodecachinglikeOPcachetoreduceexecutiontime,2)Optimizedatabaseinteractionswithpreparedstatementsandproperindexing,3)ConfigurewebserverslikeNginxwithPHP-FPMforbetterperformance,4)

APHPDependencyInjectionContainerisatoolthatmanagesclassdependencies,enhancingcodemodularity,testability,andmaintainability.Itactsasacentralhubforcreatingandinjectingdependencies,thusreducingtightcouplingandeasingunittesting.

Select DependencyInjection (DI) for large applications, ServiceLocator is suitable for small projects or prototypes. 1) DI improves the testability and modularity of the code through constructor injection. 2) ServiceLocator obtains services through center registration, which is convenient but may lead to an increase in code coupling.

PHPapplicationscanbeoptimizedforspeedandefficiencyby:1)enablingopcacheinphp.ini,2)usingpreparedstatementswithPDOfordatabasequeries,3)replacingloopswitharray_filterandarray_mapfordataprocessing,4)configuringNginxasareverseproxy,5)implementingcachingwi

PHPemailvalidationinvolvesthreesteps:1)Formatvalidationusingregularexpressionstochecktheemailformat;2)DNSvalidationtoensurethedomainhasavalidMXrecord;3)SMTPvalidation,themostthoroughmethod,whichchecksifthemailboxexistsbyconnectingtotheSMTPserver.Impl


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

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

Hot Article

Hot Tools

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

Zend Studio 13.0.1
Powerful PHP integrated development environment

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
