post带头部请求:

$pay_ulr ="地址";
$data['txamt'] = 1;
$data['phone'] = 15010123456;
$sign = strtoupper(MD5($data));
$header = ['X-PIG-APPCODE:88888888','X-PIG-SIGN:'.$sign.'']; //设置一个你的浏览器agent的header
$arr = $this->post_curl($pay_ulr,$header,$data);
return $arr;

private static function post_curl($url, $header, $content){

$ch = curl_init();
if(substr($url,0,5)=='https'){
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // 跳过证书检查
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);  // 从证书中检查SSL加密算法是否存在
}
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($content));
$response = curl_exec($ch);
if($error=curl_error($ch)){
die($error);
}
curl_close($ch);
return $response;

}


//模拟get请求
function get_curl($url,$header) {
$ch = curl_init();
curl_setopt($ch, CURLOPT_HTTPGET, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); //TRUE 将curl_exec()获取的信息以字符串返回,而不是直接输出。
curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
curl_setopt($ch, CURLOPT_HEADER, 0); //返回response头部信息
curl_setopt($ch, CURLINFO_HEADER_OUT, true); //TRUE 时追踪句柄的请求字符串,从 PHP 5.1.3 开始可用。这个很关键,就是允许你查看请求header
curl_setopt($ch, CURLOPT_URL, $url);
$result = curl_exec($ch);
echo curl_getinfo($ch, CURLINFO_HEADER_OUT); //官方文档描述是“发送请求的字符串”,其实就是请求的header。这个就是直接查看请求header,因为上面允许查看
curl_close($ch);
return $result;
}