Java php中未定义的变量名错误
用户名、电子邮件和密码中的以下代码中出现未定义的变量名错误,即使它们在表中准确定义Java php中未定义的变量名错误,java,php,android,database,server,Java,Php,Android,Database,Server,用户名、电子邮件和密码中的以下代码中出现未定义的变量名错误,即使它们在表中准确定义 <?php $con = mysqli_connect("localhost", "user", "password", "dbname"); $username = $_POST["username"]; $email=$_POST["email"]; $password = $_POST["password"]; $statement = mysqli_pre
<?php
$con = mysqli_connect("localhost", "user", "password", "dbname");
$username = $_POST["username"];
$email=$_POST["email"];
$password = $_POST["password"];
$statement = mysqli_prepare($con, "INSERT INTO `user` (`username`, `email`, `password`) VALUES (?, ?, ?)");
mysqli_stmt_bind_param($statement, "sss", $username, $email, $password);
mysqli_stmt_execute($statement);
$response = array();
$response["success"] = true;
echo json_encode($response);
?>
这是处理注册的活动
public class RegisterActivity extends Activity{
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_register);
final EditText username = (EditText) findViewById(R.id.uname);
final EditText emailid = (EditText) findViewById(R.id.eid);
final EditText password = (EditText) findViewById(R.id.pword);
final EditText cpword = (EditText) findViewById(R.id.cp);
final Button regbtn = (Button) findViewById(R.id.register);
//final String pword = password.getText().toString();
//final String conpword = cpword.getText().toString();
//if(pword.equals(conpword))
regbtn.setOnClickListener(new View.OnClickListener(){
public void onClick(View v){
final String uname=username.getText().toString();
final String mailId=emailid.getText().toString();
final String pword = password.getText().toString();
Response.Listener<String> resListener=new Response.Listener<String>(){
@Override
public void onResponse(String response) {
try {
JSONObject jsonResponse = new JSONObject(response);
Boolean success = jsonResponse.getBoolean("success");
if(success){
Intent intent = new Intent(RegisterActivity.this, MainActivity.class);
RegisterActivity.this.startActivity(intent);
}
else{
AlertDialog.Builder alertDialog = new AlertDialog.Builder(RegisterActivity.this);
alertDialog.setMessage("Registration failed")
.setNegativeButton("Retry",null)
.create()
.show();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
};
RegisterRequest registerRequest = new RegisterRequest(uname,mailId,pword,resListener);
RequestQueue registerQueue = Volley.newRequestQueue(RegisterActivity.this);
registerQueue.add(registerRequest);
}
}
);
}
公共类注册表活动扩展活动{
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity\u寄存器);
最终EditText用户名=(EditText)findViewById(R.id.uname);
最终EditText emailid=(EditText)findViewById(R.id.eid);
最终EditText密码=(EditText)findViewById(R.id.pword);
最终编辑文本cpword=(编辑文本)findViewById(R.id.cp);
最终按钮regbtn=(按钮)findviewbyd(R.id.register);
//最后一个字符串pword=password.getText().toString();
//最后一个字符串conpword=cpword.getText().toString();
//if(pword.equals(conpword))
regbtn.setOnClickListener(新视图.OnClickListener(){
公共void onClick(视图v){
最后一个字符串uname=username.getText().toString();
最后一个字符串mailId=emailid.getText().toString();
最后一个字符串pword=password.getText().toString();
Response.Listener resListener=新建Response.Listener(){
@凌驾
公共void onResponse(字符串响应){
试一试{
JSONObject jsonResponse=新的JSONObject(响应);
Boolean success=jsonResponse.getBoolean(“success”);
如果(成功){
意向意向=新意向(RegisterActivity.this,MainActivity.class);
RegisterActivity.this.startActivity(意向);
}
否则{
AlertDialog.Builder AlertDialog=新建AlertDialog.Builder(RegisterActivity.this);
alertDialog.setMessage(“注册失败”)
.setNegativeButton(“重试”,null)
.create()
.show();
}
}捕获(JSONException e){
e、 printStackTrace();
}
}
};
RegisterRequest RegisterRequest=新的RegisterRequest(uname、mailId、pword、resListener);
RequestQueue registerQueue=Volley.newRequestQueue(RegisterActivity.this);
添加(registerRequest);
}
}
);
}
变量的值被正确地传递到这里。我无法找到错误产生的原因,请帮助。首先,如果变量的值被正确传递,并且您的请求是“POST”,那么错误可能是您的json。首先,如果变量的值被正确传递,并且您的请求是“POST”,错误可能是您的json。您必须将请求方法设置为“POST”您必须将请求方法设置为“POST”