search
HomeBackend DevelopmentPHP Tutorial新人问老问题:PHP的代码用什么来调试?

PHP代码用什么工具来调试?网上有说var_dump ,但我没明白是怎么用的,还有其他什么更简单的方法吗?

我是新手,回答时还请一定详细些。非常感谢。


回复讨论(解决方案)

1、看错误日志,也最直接的
2、脚本中间强制截取 var_dump();exit;
3、php debug

1、看错误日志,也最直接的
2、脚本中间强制截取 var_dump();exit;
3、php debug
+1

echo / print_r/ var_dump()  常用的就这几个。

然后再打开php的错误提示功能

用Zend studio 不错

Zend Debugger 
XDebug

一直用
echo '

';  <br> print_r($var);  <br> 怎么破?  <p class="sougouAnswer">  具体需要看楼主调试什么信息的。如果是打印sql什么的,还是die($sql),如果是查看页面程序执行是否报错,可以打开错误调试的开关, </p> <p class="sougouAnswer">  echo / print_r/ var_dump()  常用的就这几个。  <br>  <br> 然后再打开php的错误提示功能  <br>  <br> 打开php的错误提示功能   <br>  <br> 请问这个怎么打开?谢谢。 </p> <p class="sougouAnswer">  我是想在测试时像ASP的一样,只要有错误,就会提示。现在是什么都不提示。 </p> <p class="sougouAnswer">  用Zend studio 不错  <br> Zend studio是一个外加的工具软件是吧?  <br> </p> <p class="sougouAnswer">  引用 3 楼 jordan102 的回复:echo / print_r/ var_dump()  常用的就这几个。  <br>  <br> 然后再打开php的错误提示功能  <br>  <br> 打开php的错误提示功能   <br>  <br> 请问这个怎么打开?谢谢。  <br>  <br> ini_set("display_error",On);  <br> error_reporting(E_ALL); </p> <p class="sougouAnswer">  引用 8 楼 kqyx_cn 的回复:引用 3 楼 jordan102 的回复:echo / print_r/ var_dump()  常用的就这几个。  <br>  <br> 然后再打开php的错误提示功能  <br>  <br> 打开php的错误提示功能   <br>  <br> 请问这个怎么打开?谢谢。  <br>  <br> ini_set("display_error",On);  <br> error_reporting(E_ALL);  <br>  ……  <br>  <br> 其中ini_set函数是用来修改PHP的ini配置文件的,意思是把显示错误的功能打开  <br> error_reporting函数是用来决定显示哪些错误,E_ALL代表显示所有错误,包括WARNING和NOTICE </p> <p class="sougouAnswer">  1、看错误日志,也最直接的  <br> 2、脚本中间强制截取 var_dump();exit;  <br> 3、php debug  <br> </p> <p class="sougouAnswer">  1、看错误日志,也最直接的  <br> 2、脚本中间强制截取 var_dump();exit;  <br> 3、php debug  <br> 请问1在哪里看? </p> <p class="sougouAnswer">  调试??不知道你用的开发工具是什么 初学者用记事本,将写出来的网页运行,若不是自己想要的结果,可以进行 echo 一下 最简单!并且一般情况下,sql语句会写错 ,那你echo 一下该sql 将结果放到数据库中运行,看看哪里有错  </p> <p class="sougouAnswer">  写代码我用的是editplus,环境是用护卫神的套装配置的,没有其他的软件了。  <br> 我是刚开始学习PHP。  <br> 用echo?比如我写一段循环有错误,那我该echo哪一句呢?  <br> 我是不是应该找一本书看看吧?不能像网上朋友们说的那样,只看电子版的入门教程,教程里可没讲到怎么去调试。  <br> 或许大家都对我的这些问题看成不是问题了吧,说得都比较简略,但对我来说就是不详细了,让我不知道怎么下手去操作。 </p> <p class="sougouAnswer">  用dreamwave吧 </p> <p class="sougouAnswer">  有木有人知道XDEBUG在ECLIPSE为啥设了断点不停?  <br>    <br>      <br> [/img]   </p> <p class="sougouAnswer">    <br> 这配置有啥不对嘛?  <br> 端口我也查了 netstat -anp | grep 9001  没占用啊,虽然没在断点听,但它却显示了我要的结果,可为啥就无法断点调试呢? </p> <p class="sougouAnswer">  用晚上时间配了两天还是没配起来,写个鸟网页真蛋疼  <br> 额....实在不行不搞了,插var_drump </p> <p class="sougouAnswer">  我觉得www.php100.com的教程不错,你可以去看看。 </p>
Statement
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
PHP Performance Tuning for High Traffic WebsitesPHP Performance Tuning for High Traffic WebsitesMay 14, 2025 am 12:13 AM

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

Dependency Injection in PHP: Code Examples for BeginnersDependency Injection in PHP: Code Examples for BeginnersMay 14, 2025 am 12:08 AM

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.

PHP Performance: is it possible to optimize the application?PHP Performance: is it possible to optimize the application?May 14, 2025 am 12:04 AM

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

PHP Performance Optimization: The Ultimate GuidePHP Performance Optimization: The Ultimate GuideMay 14, 2025 am 12:02 AM

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

PHP Dependency Injection Container: A Quick StartPHP Dependency Injection Container: A Quick StartMay 13, 2025 am 12:11 AM

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

Dependency Injection vs. Service Locator in PHPDependency Injection vs. Service Locator in PHPMay 13, 2025 am 12:10 AM

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.

PHP performance optimization strategies.PHP performance optimization strategies.May 13, 2025 am 12:06 AM

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

PHP Email Validation: Ensuring Emails Are Sent CorrectlyPHP Email Validation: Ensuring Emails Are Sent CorrectlyMay 13, 2025 am 12:06 AM

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

See all articles

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 Article

Hot Tools

Safe Exam Browser

Safe Exam Browser

Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

DVWA

DVWA

Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)