check mysql connections using php my admin code example

Example 1: database connectivity in php

<?php
///////////neha jaiswal/////
/////set variable/////////
$serve="localhost";
$user="root";
$password="";
$db="cart_system";///database name
///create connection with db////
$conn=mysqli_connect($serve,$user,$password,$db);
////check condition for connection fail or not
 if ($conn) {
 echo "connection success"; 
 }else
{echo "connection unsuccess"; 
 }
  ?>

Example 2: mysql connection phpmyadmin

<?php
  // This is for checking if your file is linked in your page or game or whatever
  echo "IT WORKS"; // My File is successfuly Linked

  //Remember to create a Database in phpmyadmin or any Online Database
  // the values passed in this parameters are:  the host, the user, user password and the database Name
  $con = mysqli_connect('localhost', 'root', 'root', 'unityaccess');

  // check that connection happen
  if(mysqli_connect_errno()) {
    echo "1: Connection Failed"; //error code #1 = connection Failed
    exit();
  }
?>