Php字符串不会在socket_recv中使用扩展的ascii [英] Php string does not take extended ascii in socket_recv

问题描述

I have an application where I am receiving data using socket_recv. The data received varies from 07 to ff of hex which i am storing in string. the problem is i am getting data like 3f in hex when i should receive ff. which means the problem is with sign bit. below is the example code

if(socket_recv ( $sock , $str , 6 , MSG_DONTWAIT ) === FALSE)
{
    $errorcode = socket_last_error();
    $errormsg = socket_strerror($errorcode);

    die("Could not receive data: [$errorcode] $errormsg \n");
}

我的尝试：



我尝试以各种方式显示接收的数据，并显示接收数据的十进制，十六进制等效值。不确定我是否没有正确接收或显示。

What I have tried:

I have tried displaying the received data in all ways and also displaying decimal,hex equivalent of received data. not sure whether i am not receiving properly or displaying.

推荐答案

sock ，

sock ,

str ， 6 ，MSG_DONTWAIT）=== FALSE）
{

str , 6 , MSG_DONTWAIT ) === FALSE) {

errorcode = socket_last_error（）;

errorcode = socket_last_error();

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