问在PHP中，如何检查TCP端口是否可用？

EN

function is_tcp_port_available(int $port, int &$error_code = null, string &$error_description = null):bool{
    $sock = socket_create(AF_INET,SOCK_STREAM, SOL_TCP );
    if(!$sock){
        $error_code = socket_last_error();
        $error_description = socket_strerror($error_code);
        return false;
    }
    // use @ to be compatible with ErrorException
    if(!@socket_bind($sock, "0.0.0.0", $port)){
        $error_code = socket_last_error($sock);
        $error_description = socket_strerror($error_code);        
        socket_close($sock);
        return false;
    }
    $error_code = 0;
    $error_description = "";
    socket_close($sock);
    return true;
}