fix(guide): simplify directory structure

guide/english/php/working-with-databases/index.md

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+---
+title: Working With Databases
+---
+
+## What options are available for PHP to connect to a database?
+
+PHP can connect to a variety of different databases including MongoDB, MsSQL and MySQL.
+Both PHP and MySQL are very popular and provide an easy, free and open source websites 
+to be created and are often found together to produce websites of all types. 
+Both PHP and MySQL can scale to support large numbers of users.
+
+PHP even supports more than one way to deal with connections to MySQL including MySQLi Procedural, 
+PHP Data Objects (PDO) and MySQLi Object Orientated along with the now deprecated MySQL Connect. 
+With PHP there are many features built into the core functionality of the language that make links to a 
+database simple and easy.
+
+Some Examples from Mysqli are-
+
+<?php
+$con=mysqli_connect("localhost","root","","db_name") or die("Invalid User or Password...cannot connect");
+?>
+here we are connecting to a database on the phpmyadmin structure with no password and database name-db_name

guide/english/php/working-with-databases/mysqli/index.md

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+---
+title: MySQLi
+---
+## MySQLi
+
+This is a stub. <a href='https://github.com/freecodecamp/guides/tree/master/src/pages/php/working-with-databases/mysqli/index.md' target='_blank' rel='nofollow'>Help our community expand it</a>.
+
+<a href='https://github.com/freecodecamp/guides/blob/master/README.md' target='_blank' rel='nofollow'>This quick style guide will help ensure your pull request gets accepted</a>.
+
+<!-- The article goes here, in GitHub-flavored Markdown. Feel free to add YouTube videos, images, and CodePen/JSBin embeds  -->
+MYSQLi functions allow access to the database.
+MYSQLi is an improved version of MYSQL
+
+#### Some Important MYSQLi functions and their uses:
+mysqli_connect() ==> Opens a new connection to the MySQL server
+mysqli_query() ==> Performs a query against the database
+mysqli_error() ==> Returns the last error description for the most recent function call
+mysqli_close() ==> Closes a previously opened database connection
+mysqli_connect_error() ==> Returns the error description from the last connection error
+mysqli_select_db() ==> Changes the default database for the connection
+mysqli_fetch_assoc() ==> Fetches a result row as an associative array
+
+
+#### More Information:
+<!-- Please add any articles you think might be helpful to read before writing the article -->
+<a href="https://www.w3schools.com/php/php_ref_mysqli.asp">Click here</a> For more information about MYSQLi