小编CJ_*_*CJ_的帖子

我正在尝试将以下小型QBASIC程序(可以100%工作)移植到PHP:

OPEN "com1:2400,n,8,1,DS," FOR RANDOM AS #3
OPEN "data.dat" FOR OUTPUT AS #2
REM read 17 chars from the port
scale$ = INPUT$(17, #3)
PRINT scale$
WRITE #2, scale$
CLOSE #2
CLOSE #3
SYSTEM

目前我从PHP(在WAMP5上)以编译(exe)形式调用它,但我想摆脱QBASIC并直接从PHP调用它.

我写了这个PHP函数,但它只是挂在fgets()行:

function read_port($port='COM1:', $length=17, $setmode=TRUE, $simulate='') {
    if ($simulate){
        $buffer = '"'.strval(rand(1000, 2000));
        return $buffer;
    }
    if ($setmode){
        shell_exec('mode com1: baud=2400 parity=n data=8 stop=1 to=on xon=off odsr=on octs=on dtr=on rts=on idsr=on');
    }
    $fp = fopen($port, "rb+");
    if (!$fp) {
        file_put_contents('debug1.log','COM1: could not open'."\n",FILE_APPEND);
    } else …