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Mastering Development

Prevent SQL Injection – PHP Mysqli [duplicate]

I want to improve my code to prevent SQL Injection Attacks. But I have a small problem: I want to prevent attacks on a Login page. So my users need to enter their email and password. The password is hashed with md5 before it is stored in the DB. My db connection: <?php $con = […]

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Mastering Development

deploying ruby-rails + react-js on heroku error

I am having trouble deploying an app I made with ruby on rails and react.js on heroku. Has anyone ran into these errors while deploying? I am completely stuck and hopeless remote: Usage: npm <command> remote: remote: where <command> is one of: remote: access, adduser, audit, bin, bugs, c, cache, ci, cit, remote: clean-install, clean-install-test, […]

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Mastering Development

Prevent from SQL Injection – PHP Mysqli [duplicate]

I want to improve my code from SQL Injection Attacks. But I have a small problem. I want on a Login page to prevent attacks. So my users need to enter their email and password. My password is md5 stored in DB. My db connection: <?php $con = mysqli_connect(“localhost”,”root”,””,”test”); ?> Code I want to improve […]

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Mastering Development

Problem Load Data to Table Using Angularjs Java

I want toload data to angulrjs table using java database connection and dopost method but my code not working where am I wrong……………………………………………………………………………………………………………………………………………………………………………………….. ## FormServleet.java ## package com.wcg.angular.backend; import java.io.IOException; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.*; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.json.JSONException; import org.json.JSONObject; @WebServlet(“/formServlet”) public class […]

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Mastering Development

InsertRows in QAbstractItemModel with a QSortFilterProxyModel

I am trying to make a QTreeView work with a QSortFilterProxyModel. I wrote a minimal working example (which is unfortunately not so minimal due to the complexity of the issue). The complete code is: import logging from PyQt5 import QtCore, QtWidgets import sys class DBObject: def __init__(self, name, parent, children=None): self.name = name self.parent = […]

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Mastering Development

Why many people can had same login?

I’m trying to create my own login module for my website. Also, I’m trying to disable inscription for people who had the same login or mail. It’s working, but only for the first people who register. So we can had only one admin with the mail admin@admin.com. But we can had after this 20 people […]

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Mastering Development

I’m making a simple PHP MySQL registration system and getting “syntax error, unexpected $end”. Any ideas why?

I’m making a simple PHP MySQL registration system and getting “syntax error, unexpected $end”. Here is my code for the login.php file. I’m also getting the same error on my register.php file. Any ideas why? <?php if($_SERVER[“REQUEST_METHOD”] == “POST”) { $username = $_POST[‘username’]; $password = $_POST[‘password’]; $bool = true; // Database connection $connection = mysqli_connect(“localhost”, […]

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Mastering Development

Function fetch() when I want to check [duplicate]

When I get into my sign in page it displays the error: > Fatal error: Uncaught Error: Call to a member function fetch() on bool > in C:\xampp\htdocs\SUPINFO\Page0\index.php:43 Stack trace: #0 {main} > thrown in C:\xampp\htdocs\SUPINFO\Page0\index.php on line 43 I don’t know why this is happening Here is the code that is causing the error […]

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Ask Mathematics

Asymmetry in Exponentiation

So for addition, there are two operations, addition and its inverse, subtraction. \begin{equation} x + y = z \end{equation} \begin{equation} y + x = z \end{equation} \begin{equation} z – y = x \end{equation} \begin{equation} z – x = y \end{equation} Same for multiplication, multiplication and division. \begin{equation} x * y = z \end{equation} \begin{equation} y […]

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Mastering Development

Warning: require(config): failed to open stream: No such file or directory in C:\XAMPP2\htdocs\sniregister.php on line 3

I have been facing problem and the codes are given below <?php $con=mysqli_connect(“localhot:8080”, “root”, “”) or die (“unable to connect”); mysqli_select_bd($con, ‘samplelogindb’); ?>