What should I do if the error message when writing a socket in PHP is garbled?

Solution to garbled error message when writing socket in PHP: First check the error message encoding, the code is [mb_detect_encoding(socket_last_error($socket)]; then convert the error message to [UTF-8] encoding; finally The conversion output result is normal.

Solution to garbled error message when writing socket in PHP:

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

mb_detect_encoding(socket_last_error($socket))

The result is output as ASCII.

2. From the check result in the first step, we can know that the encoding of the error message is not UTF-8, so it needs Convert the error message 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 the code conversion, the output result is normal

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