search
HomeBackend DevelopmentPHP Tutorial php get_headers 判断回来是否是200 碰到不存在的脚本执行超时

php get_headers 判断返回是否是200 碰到不存在的脚本执行超时
不存在的IP网址,会一直等待响应,直到函数超时,导致页面迟迟无法显示。

failed to open stream: HTTP request failed! 
Fatal error: Maximum execution time of 30 seconds exceeded 

设置了 ini_set('max_execution_time', 10);还一样

要不不用这个函数自己写socket了,用这个函数的curl_init,麻烦,各位有啥别好的方法没 


------解决方案--------------------

探讨

我可不行让他一直在那执行,最多执行5秒,就让他停了,但是别抱错误

------解决方案--------------------
探讨

晕,csdn原来越迟钝了,老了,回复个多长时间了还没出来

我可不想让php一直执行下去,给他个时间比如5秒,没出结果就不要了,直接判断下面的就行
set_time_limit(5)这样用的话,程序就直接停止了

------解决方案--------------------
resource fsockopen ( string $hostname [, int $port = -1 [, int &$errno [, string &$errstr [, float $timeout = ini_get("default_socket_timeout") ]]]] )
最后一个参数 $timeout设为5,即可设置最大连接时间5秒,过期函数返回,程序并不会退出
------解决方案--------------------
思路是楼上的,get_headers 只能说php这个函数不完善,咱只有用socket自己写了
由于不能给自己分,我用另外的账号登陆了,以下是完整代码,也给别人做做贡献了
PHP code
function DoGet($url)
{
    $url2 = parse_url($url);
    if(!isset($url2['path']))$url2['path']='';
    $url2["path"] = ($url2["path"] == "" ? "/" : $url2["path"]);
    $url2["port"] = (isset($url2["port"])?$url2["port"]:80);
    $host_ip = @gethostbyname($url2["host"]);
    $fsock_timeout =2;  //2 second
    if(!($fsock = fsockopen($host_ip, $url2["port"], $errno, $errstr, $fsock_timeout)))
    {
//        echo 'fsockopen fail';
        return false;
    }
    $request =  $url2["path"] .(isset($url2["query"]) ? "?".$url2["query"] : "");
    
    
    $in  = "GET " . $request . " HTTP/1.0\r\n";
    $in .= "Accept: */*\r\n";
    $in .= "User-Agent: Payb-Agent\r\n";
    $in .= "Host: " . $url2["host"] . "\r\n";
    $in .= "Connection: Close\r\n\r\n";
    
    
    stream_set_timeout( $fsock , $fsock_timeout ) ;    
    if(!@fwrite($fsock, $in, strlen($in))){
        //echo 'fwrite fail';
        fclose($fsock);
        return false;
    }
    $status = stream_get_meta_data( $fsock ) ;
    //发送数据超时
    if($status['timed_out'] )
    {
    //    echo "Write time out" ;
        fclose( $fsock );
        return false;
    }
    
    $out = null;
    while($buff = @fgets($fsock, 2048))
    {
        $out .= $buff;
        //只读取头部信息
        if(false!==strpos($out, "\r\n\r\n"))break;
    }
    
    $status = stream_get_meta_data( $fsock ) ;
    //读取数据超时
    if( $status['timed_out'] )
    {
//        echo "Read time out" ;
        fclose( $fsock );
        return false;
    }
    fclose($fsock);
    
    $pos = strpos($out, "\r\n\r\n");
    $head = substr($out, 0, $pos);    //http head
    return $head;
}


$rs= DoGet("http://www.ba05afasdfsiddf08usfa.com");
if(!$rs)echo 'fail';
else echo $rs; <div class="clear">
                 
              
              
        
            </div>
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

MantisBT

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.

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.

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

EditPlus Chinese cracked version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function

Atom editor mac version download

Atom editor mac version download

The most popular open source editor