Php 数据库没有'；我不能把信息发送给它

我几个小时来一直想找出这个问题，但似乎找不到。 我的代码是从注册表表单中的字段中获取信息，然后使用volley将其发送到Register.php。php文件应该将数据插入到数据库中，但由于某种原因它不会发生
源代码：

Register.php:

<?php
$con = mysqli_connect("http://shay.oversight-group.net/", "******", "*****", "shay_shay");


$name = $_POST["name"];
$age = $_POST["age"];
$username = $_POST["username"];
$password = $_POST["password"];

$statement = mysqli_prepare($con,"INSERT INTO user (name, age, username, password) VALUES (?,?,?,?)");
mysqli_stmt_bind_param($statement, "siss", $name, $age, $username, $password);
mysqli_stmt_execute($statement);

$response = array();
$response["success"] = true;

echo json_encode $response; ?>

    public class RegisterActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);

        final EditText etAge = (EditText) findViewById(R.id.etAge);
        final EditText etName = (EditText) findViewById(R.id.etName);
        final EditText etUsername = (EditText) findViewById(R.id.etUsername);
        final EditText etPassword = (EditText) findViewById(R.id.etPassword);
        final Button bRegister = (Button) findViewById(R.id.bRegister);

        bRegister.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                final String name = etName.getText().toString();
                final String username = etUsername.getText().toString();
                final String password = etPassword.getText().toString();
                final int age = Integer.parseInt( etAge.getText().toString());

                final Response.Listener<String> responseListener = new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) { //When response is coming back from Register.php
                        try {
                            JSONObject jsonResponse = new JSONObject(response); //New json object getting the response of register.php
                            boolean success = jsonResponse.getBoolean("success");
                            if(success == true){
                                Intent intent = new Intent(RegisterActivity.this, LoginActivity.class); // moving to login activity if register was successful
                                startActivity(intent);
                            }else{
                                AlertDialog.Builder builder = new AlertDialog.Builder(RegisterActivity.this); //shows an error if register failed.
                                builder.setMessage("Register Failed").setNegativeButton("Retry", null).create().show(); //created the error alert
                            }
                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                    }
                };
                RegisterRequest registerRequest = new RegisterRequest(name, username, password, age, responseListener);
                RequestQueue queue = Volley.newRequestQueue(RegisterActivity.this);
                queue.add(registerRequest);
            }
        });
    }
}



public class RegisterRequest extends StringRequest {
    private static final String REGISTER_REQUEST_URL = "http://shay.oversight-group.net/Register.php";
    private Map<String, String> params;

    public RegisterRequest(String name, String username, String password, int age, Response.Listener<String> listener){
        super(Method.POST, REGISTER_REQUEST_URL, listener, null);
        params = new HashMap<>();
        params.put("name", name);
        params.put("username", username);
        params.put("password", password);
        params.put("age", age+"");
    }

    @Override
    public Map<String, String> getParams() {
        System.out.println(params);
        return params;
    }
}

android studio java代码：

<?php
$con = mysqli_connect("http://shay.oversight-group.net/", "******", "*****", "shay_shay");


$name = $_POST["name"];
$age = $_POST["age"];
$username = $_POST["username"];
$password = $_POST["password"];

$statement = mysqli_prepare($con,"INSERT INTO user (name, age, username, password) VALUES (?,?,?,?)");
mysqli_stmt_bind_param($statement, "siss", $name, $age, $username, $password);
mysqli_stmt_execute($statement);

$response = array();
$response["success"] = true;

echo json_encode $response; ?>

    public class RegisterActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);

        final EditText etAge = (EditText) findViewById(R.id.etAge);
        final EditText etName = (EditText) findViewById(R.id.etName);
        final EditText etUsername = (EditText) findViewById(R.id.etUsername);
        final EditText etPassword = (EditText) findViewById(R.id.etPassword);
        final Button bRegister = (Button) findViewById(R.id.bRegister);

        bRegister.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                final String name = etName.getText().toString();
                final String username = etUsername.getText().toString();
                final String password = etPassword.getText().toString();
                final int age = Integer.parseInt( etAge.getText().toString());

                final Response.Listener<String> responseListener = new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) { //When response is coming back from Register.php
                        try {
                            JSONObject jsonResponse = new JSONObject(response); //New json object getting the response of register.php
                            boolean success = jsonResponse.getBoolean("success");
                            if(success == true){
                                Intent intent = new Intent(RegisterActivity.this, LoginActivity.class); // moving to login activity if register was successful
                                startActivity(intent);
                            }else{
                                AlertDialog.Builder builder = new AlertDialog.Builder(RegisterActivity.this); //shows an error if register failed.
                                builder.setMessage("Register Failed").setNegativeButton("Retry", null).create().show(); //created the error alert
                            }
                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                    }
                };
                RegisterRequest registerRequest = new RegisterRequest(name, username, password, age, responseListener);
                RequestQueue queue = Volley.newRequestQueue(RegisterActivity.this);
                queue.add(registerRequest);
            }
        });
    }
}



public class RegisterRequest extends StringRequest {
    private static final String REGISTER_REQUEST_URL = "http://shay.oversight-group.net/Register.php";
    private Map<String, String> params;

    public RegisterRequest(String name, String username, String password, int age, Response.Listener<String> listener){
        super(Method.POST, REGISTER_REQUEST_URL, listener, null);
        params = new HashMap<>();
        params.put("name", name);
        params.put("username", username);
        params.put("password", password);
        params.put("age", age+"");
    }

    @Override
    public Map<String, String> getParams() {
        System.out.println(params);
        return params;
    }
}

公共类注册表活动扩展了AppCompatActivity{
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity\u寄存器）；
最终EditText etAge=（EditText）findViewById（R.id.etAge）；
最终EditText etName=（EditText）findViewById（R.id.etName）；
最终EditText etUsername=（EditText）findViewById（R.id.etUsername）；
最终EditText etPassword=（EditText）findViewById（R.id.etPassword）；
最终按钮b注册表=（按钮）findViewById（R.id.b注册表）；
bRegister.setOnClickListener（新视图.OnClickListener（）{
@凌驾
公共void onClick（视图）{
最终字符串名称=etName.getText（）.toString（）；
最终字符串username=etUsername.getText（）.toString（）；
最终字符串password=etPassword.getText（）.toString（）；
final int age=Integer.parseInt（etAge.getText（）.toString（））；
final Response.Listener responseListener=new Response.Listener（）{
@凌驾
public void onResponse（字符串响应）{//当响应从Register.php返回时
试一试{
JSONObject jsonResponse=newJSONObject（response）；//获取register.php响应的新json对象
boolean success=jsonResponse.getBoolean（“success”）；
if（success==true）{
Intent Intent=new Intent（RegisterActivity.this，LoginActivity.class）；//如果注册成功，则移动到登录活动
星触觉（意向）；
}否则{
AlertDialog.Builder=新建AlertDialog.Builder（RegisterActivity.this）；//如果注册失败，则显示错误。
builder.setMessage（“注册失败”）.setNegativeButton（“重试”，null）.create（）.show（）；//创建了错误警报
}
}捕获（JSONException e）{
e、 printStackTrace（）；
}
}
};
RegisterRequest RegisterRequest=新的RegisterRequest（名称、用户名、密码、年龄、响应侦听器）；
RequestQueue=Volley.newRequestQueue（RegisterActivity.this）；
添加（registerRequest）；
}
});
}
}
公共类RegisterRequest扩展了StringRequest{
专用静态最终字符串寄存器\u请求\u URL=”http://shay.oversight-group.net/Register.php";
私有映射参数；
公共RegisterRequest（字符串名称、字符串用户名、字符串密码、整数、响应.侦听器）{
super（Method.POST，REGISTER\u REQUEST\u URL，listener，null）；
params=新的HashMap（）；
参数put（“名称”，名称）；
参数put（“用户名”，用户名）；
参数put（“密码”，密码）；
参数put（“年龄”，年龄+”）；
}
@凌驾
公共映射getParams（）{
系统输出打印项次（参数）；
返回参数；
}
}

真实数据库的密码，耶！使用您的

服务器ip地址更改连接url

或更改为

本地主机

使用和在您的查询中检查错误-如果没有任何结果，那么这是安卓系统的问题，我无法帮助您@shaymishali@Archish非常感谢。解决了我的问题！！非常感谢。真正数据库的密码，耶！使用您的

服务器ip地址更改连接url

或更改为

本地主机

使用和在您的查询中检查错误-如果没有任何结果，那么这是安卓系统的问题，我无法帮助您@shaymishali@Archish非常感谢。解决了我的问题！！非常感谢。