PHP编程中第三方API如何调用

<?php
require "conn.php";
header("Access-Control-Allow-Origin:*");//允许任何访问(包括);
header("Content-Type:Content-Type:text/html;charset=utf-8");
//编写用户手机归属地的接口的编写
//通过GET方式来获取手机号，从而判断手机归属地返回状态值给前端
$phone=@$_REQUEST['phone'];
if(!empty($phone))
{
$save_phone="select * from `user_phone` where phone='$phone'";
$bb=mysql_query($save_phone);
if(!mysql_fetch_row($bb))
{
$sa="insert into user_phone (phone)  values ('$phone')";
mysql_query($sa);
}
$ch=curl_init();//初始化一个事件

$url="http://apis.baidu.com/apistore/mobilenumber/mobilenumber?";
$url=$url."phone=".$phone;
$header=array('apikey:37a7f771473018c9d6188855c03d87c0');//
curl_setopt($ch,CURLOPT_HTTPHEADER,$header);
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
$cc=curl_exec($ch);
curl_close($ch);
//解决一些中文乱码的问题
var_dump(json_decode($cc));
exit;
exit(json_encode($cc));
}

?>