Arturo

## Description I've added a new Singleton Design Pattern in PHP ## Related Issue #427 ## Types of changes What types of changes does your code introduce? Put an `x`...

## Title: Singleton Design Pattern (PHP) ## Body: Singleton Design Pattern developed in PHP Are you working on this? - **Yes**

## Title: Binary Search (PHP) ## Body: Binary Search algorithm developed in PHP Are you working on this? - **Yes**