PHP MySQLi Base class: Extends MySQLi class to perform common SQL queries This class can extends MySQLi class to perform common SQL queries. It is a subclass of the MySQLi class built-in class that provides additional functionality like: - Executes SELECT queries with results from multiple rows from another query result - Executes SELECT queries that result in a single row - Retrieves the total number of rows and consulted columns - Retrieves an array of values ​​of a given table field - Executes SQL statements INSERT, DELETE, UPDATE - Inserts records in a table from array values - Update records of a table from an array of values and a condition - Remove table records - Converts an associated a key-value into a string separated by the indicated separator - Retrieve the results of a SELECT query in multiple rows mode or in a single row or the first row of multiple rows - Assemble a JSON string from the results of value of a query with two columns the first is the key and the second the value - Etc.. The code and the comments are in Spanish. In Spanish: Clase PHP para el manejo de la conexión e interacción con la base de datos MySQL. Clase que extiende de MySQLi.