php curl模拟 get,post提交，上传文件,下载文件

$ch=curl_init();//初始化一个CURL对话；
curl_setopt($ch, CURLOPT_URL, "http://localhost/wish/test/file2.php?t=1&p=2");
curl_setopt($ch, CURLOPT_HEADER, 0);
// 抓取URL并把它传递给浏览器
curl_exec($ch);
// 关闭cURL资源，并且释放系统资源
curl_close($ch);

$ch=curl_init();//初始化一个CURL对话；
$data=array(
    ‘name‘=>‘xie‘,
    ‘password‘=>‘123456‘,
);
curl_setopt($ch, CURLOPT_URL, "http://localhost/wish/test/file2.php");
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt ( $ch, CURLOPT_POSTFIELDS, $data );
// 抓取URL并把它传递给浏览器
curl_exec($ch);
// 关闭cURL资源，并且释放系统资源
curl_close($ch);

$post = array(
    ‘name‘=>‘xyt‘,
    "excel"=>"@1.txt",//这里是要上传的文件，key与后台处理文件对应
);
echo "start:----------\n";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "http://localhost/wish/test/file2.php");
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_HEADER, 0);

curl_setopt($ch, CURLOPT_POSTFIELDS,$post);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_VERBOSE, 0);

$a=curl_exec($ch);
echo $a;
curl_close($ch);