Since PHP is widely used and popular, PHP security is crucial and the number of vulnerable PHP applications is large. PHP is as secure as any other programming language. According to research, it helps to power more than 70% of the global web applications by making it one of the most commonly used programming languages in the world. Many PHP web apps share parts of scripts with other web applications. If the shared piece of code is found to be vulnerable, all the web applications that are using it, also become vulnerable.