有两个页面一个是ajax页面 一个是查数据的页面 我就是想先把查询到的数据先alert一下 可是什么都弹不出来 提示这个错误：
XMLHttpRequest cannot load file:///D:/wamp/www/chaxun.php. Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-extension, https,
是不是数据格式有问题呢 还是哪里的问题？
第一个页面
<!DOCTYPE html><html><head> <meta charset="utf-8"> <title></title> <script type="text/javascript"> function ajax(url,funsucc){ var oAjax=new XMLHttpRequest(); oAjax.open('GET',url,true); oAjax.send(); oAjax.onreadystatechange=function(){ if(oAjax.readyState==4){ if(oAjax.status==200){ funsucc(oAjax.responseText); } } } } </script> <script type="text/javascript"> ajax('chaxun.php',function(str){ alert(str); }); </script></head><body></body></html> 第二个页面
chaxun.php
<?php$pdo=new PDO("mysql:host=localhost;dbname=t1","root","");$stmt=$pdo->prepare("select * from user");$stmt->execute();$res=$stmt->fetchall(PDO::FETCH_ASSOC);foreach($res as $v){ echo $v['username'];}?>
回复讨论(解决方案)
有些浏览器要求必须有WEB服务才能访问某些JS函数，不建服务器不行。
XMLHttpRequest cannot load file:///D:/wamp/www/chaxun.php. Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-extension, https,
XMLHttpRequest无法加载文件：/ / / D /服务器/网络/ chaxun.php。跨域请求仅支持协议：HTTP，数据，Chrome，Chrome扩展，HTTPS，
请在网站上执行您的程序
XMLHttpRequest cannot load file:///D:/wamp/www/chaxun.php. Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-extension, https,
XMLHttpRequest无法加载文件：/ / / D /服务器/网络/ chaxun.php。跨域请求仅支持协议：HTTP，数据，Chrome，Chrome扩展，HTTPS，
请在网站上执行您的程序
这是什么意思呢 我就是在wamp环境下运行的
有些浏览器要求必须有WEB服务才能访问某些JS函数，不建服务器不行。
我就是在wamp环境下运行的啊
你的第一段代码就不是从服务器上运行的
你的第一段代码就不是从服务器上运行的[/
你的第一段代码就不是从服务器上运行的
好的 可以了 谢谢
PHP Dependency Injection Container: A Quick StartMay 13, 2025 am 12:11 AMAPHPDependencyInjectionContainerisatoolthatmanagesclassdependencies,enhancingcodemodularity,testability,andmaintainability.Itactsasacentralhubforcreatingandinjectingdependencies,thusreducingtightcouplingandeasingunittesting.
Dependency Injection vs. Service Locator in PHPMay 13, 2025 am 12:10 AMSelect 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.May 13, 2025 am 12:06 AMPHPapplicationscanbeoptimizedforspeedandefficiencyby:1)enablingopcacheinphp.ini,2)usingpreparedstatementswithPDOfordatabasequeries,3)replacingloopswitharray_filterandarray_mapfordataprocessing,4)configuringNginxasareverseproxy,5)implementingcachingwi
PHP Email Validation: Ensuring Emails Are Sent CorrectlyMay 13, 2025 am 12:06 AMPHPemailvalidationinvolvesthreesteps:1)Formatvalidationusingregularexpressionstochecktheemailformat;2)DNSvalidationtoensurethedomainhasavalidMXrecord;3)SMTPvalidation,themostthoroughmethod,whichchecksifthemailboxexistsbyconnectingtotheSMTPserver.Impl
How to make PHP applications fasterMay 12, 2025 am 12:12 AMTomakePHPapplicationsfaster,followthesesteps:1)UseOpcodeCachinglikeOPcachetostoreprecompiledscriptbytecode.2)MinimizeDatabaseQueriesbyusingquerycachingandefficientindexing.3)LeveragePHP7 Featuresforbettercodeefficiency.4)ImplementCachingStrategiessuc
PHP Performance Optimization Checklist: Improve Speed NowMay 12, 2025 am 12:07 AMToimprovePHPapplicationspeed,followthesesteps:1)EnableopcodecachingwithAPCutoreducescriptexecutiontime.2)ImplementdatabasequerycachingusingPDOtominimizedatabasehits.3)UseHTTP/2tomultiplexrequestsandreduceconnectionoverhead.4)Limitsessionusagebyclosin
PHP Dependency Injection: Improve Code TestabilityMay 12, 2025 am 12:03 AMDependency 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 OptimizationMay 12, 2025 am 12:02 AMDatabasequeryoptimizationinPHPinvolvesseveralstrategiestoenhanceperformance.1)Selectonlynecessarycolumnstoreducedatatransfer.2)Useindexingtospeedupdataretrieval.3)Implementquerycachingtostoreresultsoffrequentqueries.4)Utilizepreparedstatementsforeffi
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
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.
Dreamweaver Mac version
Visual web development tools
MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.
WebStorm Mac version
Useful JavaScript development tools
Zend Studio 13.0.1
Powerful PHP integrated development environment
