search
HomeBackend DevelopmentPHP Tutorial 求解关于preg_replace函数解决思路

求解关于preg_replace函数
我想使用preg_replace函数把text里面的部分字符替换成图片
当我这样写时可以正常执行

<br />
$expression ="/@呲牙/";<br />
$reexpression ="呲牙";<br />
$text=preg_replace($expression,'<img  src="/static/imghwm/default1.png"  data-src="www.test.com/static/expression/'.$reexpression.'.gif"  class="lazy"  .$reexpression.'.gif" / alt=" 求解关于preg_replace函数解决思路 " > ',$text);

可是当我改成数组后替换后图片的url都成了www.test.com/static/expression/Array.gif了
<br />
$expression =array("/@呲牙/","/@鄙视/","/@折磨/");<br />
$reexpression =array("呲牙","鄙视","折磨");<br />
$text=preg_replace($expression,'<img  src="/static/imghwm/default1.png"  data-src="www.test.com/static/expression/'.$reexpression.'.gif"  class="lazy"  .$reexpression.'.gif" / alt=" 求解关于preg_replace函数解决思路 " > ',$text);

我刚接触php,希望大家能帮忙看一下


------解决方案--------------------
在执行函数前会先计算出参数的值。因此也就是:
$replace = ' 求解关于preg_replace函数解决思路  ';
$text = preg_replace($expression, $replace, $text);
// 由于 $reexpression 是个数组,因此数组和字符串相连就会是Array.gif

看你的需求,重新写一下:
$text = '别@呲牙了,->@鄙视<-';<br />
$reexpression =array("呲牙","鄙视","折磨");<br />
// 希望你的程序最好以UTF-8编码,u修饰符的作用就是避免编码出现意外的混乱<br />
$find = '#@('. join('<br><font color='#FF8000'>------解决方案--------------------</font><br>', $reexpression) .')#u';<br />
$replace = '<img src="/static/imghwm/default1.png"  data-src="www.test.com/static/expression/$1.gif"  class="lazy"   alt="$1"/>';<br />
$text = preg_replace($find, $replace, $text);

另外你的图片以中文命名,还需要注意可能在IE下产生的编码问题,导致图片加载404错误

附手册: http://php.net/preg-replace
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 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

How to make PHP applications fasterHow to make PHP applications fasterMay 12, 2025 am 12:12 AM

TomakePHPapplicationsfaster,followthesesteps:1)UseOpcodeCachinglikeOPcachetostoreprecompiledscriptbytecode.2)MinimizeDatabaseQueriesbyusingquerycachingandefficientindexing.3)LeveragePHP7 Featuresforbettercodeefficiency.4)ImplementCachingStrategiessuc

PHP Performance Optimization Checklist: Improve Speed NowPHP Performance Optimization Checklist: Improve Speed NowMay 12, 2025 am 12:07 AM

ToimprovePHPapplicationspeed,followthesesteps:1)EnableopcodecachingwithAPCutoreducescriptexecutiontime.2)ImplementdatabasequerycachingusingPDOtominimizedatabasehits.3)UseHTTP/2tomultiplexrequestsandreduceconnectionoverhead.4)Limitsessionusagebyclosin

PHP Dependency Injection: Improve Code TestabilityPHP Dependency Injection: Improve Code TestabilityMay 12, 2025 am 12:03 AM

Dependency injection (DI) significantly improves the testability of PHP code by explicitly transitive dependencies. 1) DI decoupling classes and specific implementations make testing and maintenance more flexible. 2) Among the three types, the constructor injects explicit expression dependencies to keep the state consistent. 3) Use DI containers to manage complex dependencies to improve code quality and development efficiency.

PHP Performance Optimization: Database Query OptimizationPHP Performance Optimization: Database Query OptimizationMay 12, 2025 am 12:02 AM

DatabasequeryoptimizationinPHPinvolvesseveralstrategiestoenhanceperformance.1)Selectonlynecessarycolumnstoreducedatatransfer.2)Useindexingtospeedupdataretrieval.3)Implementquerycachingtostoreresultsoffrequentqueries.4)Utilizepreparedstatementsforeffi

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

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)