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

Jun 13, 2016 pm 01:21 PM
out quot timeout url

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>
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