Though PHP and JavaScript both are renowned scripting languages there are significant differences between the both of them. Some of them are listed here:

• JavaScript serves as the primary language that is utilized for execution by the client side. PHP on the other hand is a language that is implemented on server side.
• One important advantage PHP enjoys over Perl or C is that it is aimed to create scripting web pages and thus performs a number of web design functions. PHP is essentially designed to coexist with the HTML which makes the coding cleaner and readable.
• Javascript can often be very complicated when compared to PHP. PHP is a simple language that can be used to produce numerous powerful programming languages.
• Javascript is a client side programming language which means that it can be designed and tested on your own computer instead of requiring an internet connection. PHP application development however requires an internet connection.

PHP is much more secure and easy to learn as compared to Javascript, this is the reason why people are more inclined to hire PHP developers for web application development.