我正在尝试使用Xamp Server从数据库中获取数据但是收到此错误.
致命错误:未捕获错误:在E:\ xamp\htdocs\PoliceApp\News\fetch.php中调用未定义函数mysql_select_db():10堆栈跟踪:#0 {main}抛出E:\ xamp\htdocs\PoliceApp\News第10行的\ fetch.php
下面是我的PHP脚本,我仍然是新的PHP请帮我解决这个问题.但是我在这里阅读了所有其他帖子,但它似乎让我很困惑,我怎么能把它做对.
<?php
$username="root";
$password="namungoona";
$hostname = "localhost";
//connection string with database
$dbhandle = mysqli_connect($hostname, $username, $password)
or die("Unable to connect to MySQL");
echo "";
// connect with database
$selected = mysql_select_db("police",$dbhandle)
or die("Could not select examples");
//query fire
$result = mysql_query("select * from News;");
$json_response = array();
// fetch data in array format
while ($row = mysql_fetch_array($result, MYSQL_ASSOC)) {
// Fetch data of Fname Column and store in array …Run Code Online (Sandbox Code Playgroud) 我正在尝试使用此文件在 Circle CI 中生成测试覆盖率config.yml,但构建失败并显示没有连接的设备。以下是 Circle CI 上生成的错误:
根据我所读到的,Circle CI 目前不支持 Emulators。
以下是我的config.yml文件:
version: 2
jobs:
build:
working_directory: ~/ConvergeLevelApp
docker:
- image: circleci/android:api-25-alpha
environment:
JVM_OPTS: -Xmx3200m
CC_TEST_REPORTER_ID: 403xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
ADB_INSTALL_TIMEOUT: 60
steps:
- checkout
- restore_cache:
key: jars-{{ checksum "build.gradle" }}-{{ checksum "app/build.gradle" }}
- run:
name: Download Dependencies
command: ./gradlew androidDependencies
- save_cache:
paths:
- ~/.gradle
key: jars-{{ checksum "build.gradle" }}-{{ checksum "app/build.gradle" }}
- run:
name: Setup Code Climate test-reporter
command: |
curl -L https://codeclimate.com/downloads/test-reporter/test-reporter-latest-linux-amd64 > …Run Code Online (Sandbox Code Playgroud) 2021-09-20T12:12:36.166584+02:00我正在尝试使用库来格式化日期,date-fns但它不起作用,正确的方法是什么?
下面是我的代码:
import { format } from 'date-fns'
format(date, 'DD.MM.YYYY')
Run Code Online (Sandbox Code Playgroud) 我是 React 的新手并试图定义 PropTypes,但似乎不再有效:
以下是我如何使用它:
React.PropTypes.func.isRequired
Run Code Online (Sandbox Code Playgroud)
然后这是我缺少的组件:
import React, {Component} from 'react';
import {Input,Icon,Row,Card, Button} from 'react-materialize'
import '../css/signup.css'
import PropTypes from 'prop-types';
class SignUpForm extends Component {
constructor(props) {
super(props);
this.state = {username: '', email:'', password:'', confirm_password:''};
this.handleChange = this.handleChange.bind(this);
this.handleSubmit = this.handleSubmit.bind(this);
}
handleChange(event) {
this.setState({username: event.target.username});
this.setState({email: event.target.email});
this.setState({password: event.target.password});
this.setState({confirm_password: event.target.confirm_password});
}
handleSubmit(event) {
event.preventDefault();
this.props.userSignUpRequest(this.state);
}
render() {
return (
<div>
<Card className="card-effects right">
<form className="card-form-signup" onSubmit={this.handleSubmit}>
<Row>
<label className="signup-header"><b>Signup to Authors Haven</b></label>
</Row> …Run Code Online (Sandbox Code Playgroud) 我正在尝试从Firebase数据库中将数据检索到RecyclerView中,但是遇到此错误java.lang.NullPointerException:尝试调用虚拟方法。 'com.google.firebase.database.DatabaseReference com.google.firebase.database.DatabaseReference.child(java.lang.String)' on a null object reference
以下是我的主要活动班。
package oerrride.we.huzykamz.testingappfirebase;
import android.app.Dialog;
import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.Button;
import com.google.android.gms.common.GoogleApiAvailability;
import com.google.android.gms.tasks.Task;
import com.google.firebase.database.ChildEventListener;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private Button but;
private DatabaseReference mRef;
private MyAdapter adapter;
public RecyclerView recyclerView;
public List<ModelClass> movies_;
public Context c;
private LinearLayoutManager linearLayoutManager;
private DatabaseReference mMovieRef =mRef.child("Name");
@Override
protected …Run Code Online (Sandbox Code Playgroud) 我正在尝试在Circle CI上运行构建,但是在android kotlin中遇到了这个模棱两可的checkstyle错误,我不知道为什么会发生这种情况,以下是该错误:
/home/circleci/repo/app/src/main/java/com/andela/mrm/util/ConvergeUIUtils.kt:(12,23):导入冲突,导入名称“ Toast”不明确e:/ home / circleci / repo / app / src / main / java / com / andela / mrm / util / ConvergeUIUtils.kt:(14,23):导入冲突,导入名称“ Toast”不明确
以下是ConvergeUIUtils.kt文件:
import android.content.Context
import android.graphics.Color
import android.graphics.PorterDuff
import android.support.constraint.ConstraintLayout
import android.support.design.widget.Snackbar
import android.support.v4.content.ContextCompat
import android.view.Gravity
import android.view.View
import android.widget.TextView
import android.widget.Toast
import com.andela.mrm.R
/**
* Important methods for the application UI.
*/
class ConvergeUIUtils
/**
* Private constructor to prevent instantiation.
*/
private constructor() {
init {
throw UnsupportedOperationException() …Run Code Online (Sandbox Code Playgroud)