What they are meant for?

HTML and PHP are two different things meant for two different task.

As far as HTML (Hypertext Markup Language) is concerned, HTML (along with CSS) is a backbone of all the web-development and used as a front end development whereas PHP (Hypertext Preprocessor) is a server side scripting language which execute as a back-end.

PHP can be used to manipulate data on the server and output the data according to the user’s input.

Behavior:

HTML creates static web pages whereas PHP creates dynamic website.

What is HTML?

HTML is a markup language and render the page into something pretty (along with CSS). HTML files use “tags” to tell a browser how to display specific pieces of text or image. It’s sole purpose is defining the layout of a web page.

What is PHP?

PHP is a server side programming language. When a browser asks for a webpage PHP is capable of processing the request and generating the HTML to display to the client (i.e. web browser). PHP is capable of handling a lot of different information and is capable of working with complex data structures, performing calculations, looking up information in databases and much more.

PHP VS HTML: MAJOR SIMILARITIES

While they’re designed to tackle development on opposite ends of the web development spectrum, they do share a few similarities.

• Both are compatible with almost every web browser.
• Both can integrate with AJAX for dynamic websites, HTML on the front-end and PHP on the back-end

SUMMARY

HTML is markup language use to design and develop the structure of the website. PHP is the server side scripting language use to manipulate the data on the server and display the data according to the user’s input.

Both can integrate with AJAX for dynamic websites, HTML on the front-end and PHP on the back-end.