php curl那点事儿

curl是最常用功能之一初始化句柄
$ch = curl_init();

post 传$data
1. 如果$data是字符串，则Content-Type是application/x-www-form-urlencoded。
2、如果$data是k=>v的数组，则Content-Type是multipart/form-data,

编码设置
$header = array(‘Content-Type:application/x-www-form-urlencoded;charset=utf8‘);
curl_setopt($ch,CURLOPT_HTTPHEADER,$header);

post方式
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);

返回值
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);

超时
curl_setopt($ch, CURLOPT_TIMEOUT, 20);

执行
curl_exec($ch);

是否有异常
if (curl_errno($ch)) 

关闭
curl_close($ch);

一个实例，post数据到某短信端口：

/**
* $sender 发送人
*$reveivers 收信人手机号 数据格式
*$msg 短信内容
*sname 发送人姓名
*/
function send($sender,$receivers,$msg,$sname){

  $tos = "";
  foreach ($receivers as $v) {  //将收信人转为以‘,‘分割的字符串
    $tos .= $v.",";
  }

  $userName = ‘hnxxx**‘;
  $pwd = ‘fuckwl***‘;
  $st = date(‘mdHis‘);　　

  $post_data = array () ;

  $post_data[‘UserName‘] = $userName;

  $post_data[‘Key‘] = getKey($userName, $pwd, $st);

  $post_data[‘Timestemp‘] = $st;
  $post_data[‘Content‘] = ‘【前缀】‘.$msg;
  $post_data[‘CharSet‘] = ‘utf-8‘;
  $post_data[‘Mobiles‘] = $tos;
  $url = ‘http://www.xxx.com:3070/Http_Service/SendSms‘;
  $o = "" ;
  foreach ( $post_data as $k => $v )
  {
       $o .= "$k=".urlencode($v)."&" ;
  }
  $post_data = substr($o, 0, -1) ;
    $curl = curl_init();
  $header = array(‘Content-Type:application/x-www-form-urlencoded;charset=utf8‘);
  curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
  curl_setopt($curl, CURLOPT_URL, $url);
  curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
  curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
  curl_setopt($curl, CURLOPT_POST, 1);
  curl_setopt($curl, CURLOPT_POSTFIELDS, $post_data);
  curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
  $result = curl_exec($curl);
  if (curl_errno($curl)) {
     echo ‘Errno‘.curl_error($curl);
  }
  curl_close($curl);

  echo $result;
  echo $post_data;

}