PHP接收外部发来的数据

1.
<?php
$mysql_server_name=‘localhost‘; //改成自己的mysql数据库服务器
$mysql_username="root"; //改成自己的mysql数据库用户名
$mysql_password="qmtg"; //改成自己的mysql数据库密码
$mysql_database="testmydatabase"; //改成自己的mysql数据库名
$conn=new mysqli($mysql_server_name,$mysql_username,$mysql_password); //连接数据库
if($conn==false)
{
    echo "数据连接失败！";
}
else
{
    echo "数据连接成功！";
}
 
$conn->query("set names ‘utf8‘"); //数据库输出编码 应该与你的数据库编码保持一致.南昌网站建设公司百恒网络PHP工程师建议用UTF-8 国际标准编码.
$conn -> select_db($mysql_database); //打开数据库
$sql ="select * from testtale "; //SQL语句
$result = $conn->query($sql); //查询成功
$data=array();
echo "start".PHP_EOL;
    while ($tmp=$result->fetch_assoc()) 
    {
        $data[]=$tmp;
        echo  "name:".$tmp[‘name‘] . PHP_EOL ;      
    }
    //echo json_encode($data);
//var_dump($data);
print_r($data);
echo "end".PHP_EOL;
class person
{
    public $name;
    public $age;
    public $height;
    function __construct($name,$age,$height)
    {
        $this->name = $name;
        $this->age = $age;
        $this->height = $height;    
    }   
}
$obj = new person("zhangsan",20,100);
$foo_json = json_encode($obj);
echo $foo_json;
$d = $_GET[‘test‘];
echo $d;


?>