PHP入门5 C++和PHP二进制传输

C++需要实现PHP端的:

bin2Hex

函数,PHP通过这种类型的字符串调用:

pack

转换成PHP能识别的2进制数据。

C++需要做的是实现一个bin2hex,其实只是把c++读取的2进制数据当成byte数组,把每一位转换成16进制字符串就可以了。Qt中使用sprintf无法限制2位长度,因此sprintf之后判断长度为8则截取最后3个字符串，包含了/0终止符

<code>
QString Bin2Hex(char* data1,<span>int</span> len)
{
    QString <span>s</span> ;
    QString r ;

    <span>for</span> (<span>int</span><span>x</span>=<span>0</span>;<span>x</span><len>x++)
    {
        <span>s</span>.<span>sprintf</span>(<span>"<span>%02x</span>\0"</span>,data1[<span>x</span>]);


        <span>if</span>(<span>s</span>.<span>length</span>()&gt;<span>2</span>)
        {
            <span>s</span>=<span>s</span>.mid(<span>6</span>,<span>8</span>);
        }
        r.append(<span>s</span>);
    }

    <span>return</span> r;
}

QVariant QmlClass::readimg(QString file)
{

    QFile mfile(file);
    <span>if</span>(!mfile.<span>open</span>(QIODevice::ReadOnly) )
    {

        qDebug()"文件不存在";
        <span>return</span><span>""</span>;
    }

    qDebug()"文件存在";
    QByteArray  ar  = mfile.readAll();
    char * adr =ar.data();
    QString <span>m</span>= Bin2Hex(adr,ar.size());
    <span>return</span><span>m</span>;
}</len></code>

<code><span><span>function</span><span>uploadimg</span><span>()</span>
    {</span><span>var</span>  x = <span>new</span> XMLHttpRequest();

        x.onreadystatechange =<span><span>function</span><span>()</span>
        {</span><span>if</span>(x.readyState == <span>4</span>) {

                <span>if</span>(x.status == <span>200</span>) {
                    console.log(<span>"The server replied with: "</span> + x.responseText);
                    txt.text = x.responseText;

                }


            }
        };
        <span>var</span> xxx =<span>new</span><span>Object</span>;
        <span>var</span> d=myapp.readimg(<span>":/1.jpg"</span>);
        console.log(<span>typeof</span> d)
        x.open(<span>"POST"</span>,<span>"http://localhost/mycode/Test/reg.php"</span>,<span>true</span>);
        console.log(d)
        <span>//post请求要自己设置请求头</span>
         x.setRequestHeader(<span>"Content-Type"</span>,<span>"application/x-www-form-urlencoded"</span>);
        x.send(d);
    }</code>

<code><span><span><?php </span><span>$filename</span>=<span>"teststream.jpg"</span>;<span>//要生成的图片名字 </span><span>$data_buff</span>=file_get_contents(<span>"php://input"</span>);
  <span>echo</span><span>$data_buff</span>;
  <span>$jpg</span> = pack(<span>"H*"</span>,<span>$data_buff</span>);<span>//得到post过来的二进制原始数据 </span><span>$file</span> = fopen(<span>"pic/"</span>.<span>$filename</span>,<span>"wb"</span>);<span>//打开文件准备写入</span>
  fwrite(<span>$file</span>,<span>$jpg</span>);<span>//写入</span>
  fclose(<span>$file</span>);<span>//关闭</span><span>?&gt;</span></span></span></code>

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以上就介绍了 PHP入门5 C++和PHP二进制传输，包括了方面的内容，希望对PHP教程有兴趣的朋友有所帮助。