1.
<?php
$mysql_server_name=‘localhost‘; //改成自己的mysql數據庫服務器
$mysql_username="root"; //改成自己的mysql數據庫用戶名
$mysql_password="qmtg"; //改成自己的mysql數據庫密碼
$mysql_database="testmydatabase"; //改成自己的mysql數據庫名
$conn=new mysqli($mysql_server_name,$mysql_username,$mysql_password); //連接數據庫
if($conn==false)
{
    echo "數據連接失敗！";
}
 
else
{
    echo "數據連接成功！";
}
 
$conn->query("set names ‘utf8‘"); //數據庫輸出編碼 應該與你的數據庫編碼保持一致.南昌網站建設公司百恒網絡PHP工程師建議用UTF-8 國際標準編碼.
$conn -> select_db($mysql_database); //打開數據庫
$sql ="select * from testtale "; //SQL語句
$result = $conn->query($sql); //查詢成功
$data=array();
echo "start".PHP_EOL;
    while ($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;


?>

2.這句就是接收

$d = $_GET[‘test‘];
echo $d;

3.不用加雙引號

4.字符串可以直接這樣判斷

5.

PHP接收外部發來的數據