How to solve php socket garbled problem

Solution to php socket garbled code: First check the encoding of the error message through the "mb_detect_encoding(socket_last_error($socket))" method; then convert the error message to "UTF-8" encoding.

PHP writing socket error message garbled problem

Problem

Because the default of PHP project is The UTF-8 encoding is used. Since the error message when using socket programming is not the UTF-8 encoding used, the output errors are displayed in garbled characters on the browser and console.

The error message is as follows:

socket_connect(): unable to connect [10061]: ����Ŀ����������ܾ����޷����ӡ�

Processing process

1. First, check the encoding of the error message through the following code

mb_detect_encoding(socket_last_error($socket))

The result is output as ASCII .

2. From the check results in the first step, we know that the encoding of the error message is not UTF-8, so the error message needs to be converted to UTF-8 encoding. This can be achieved through the following function:

 function doEncoding($str){
        $encode = strtoupper(mb_detect_encoding($str, ["ASCII",'UTF-8',"GB2312","GBK",'BIG5']));
        if($encode!='UTF-8'){
            $str = mb_convert_encoding($str, 'UTF-8', $encode);
        }
        return $str;
    }

After this code conversion, the output result is normal

socket_connect() failed. Reason: The connection cannot be made because the target computer actively refuses.

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