PHP Tutorials

Overview and Introduction

https://www.youtube.com/watch?v=uywEDAe9zTM

What is PHP?

PHP is a server scripting language and a powerful tool for making dynamic and interactive Web pages.

PHP is a widely-used, free, and efficient alternative to competitors such as Microsoft's ASP.

  • PHP is an acronym for "PHP: Hypertext Preprocessor"
  • PHP is a widely-used, open source scripting language
  • PHP scripts are executed on the server
  • PHP is free to download and use

What is a PHP File?

  • PHP files can contain text, HTML, CSS, JavaScript, and PHP code
  • PHP code is executed on the server, and the result is returned to the browser as plain HTML
  • PHP files have extension ".php"
  • PHP files can contain text, HTML, CSS, JavaScript, and PHP code
  • PHP code is executed on the server, and the result is returned to the browser as plain HTML

What Can PHP Do?

  • PHP can generate dynamic page content
  • PHP can create, open, read, write, delete, and close files on the server
  • PHP can collect form data
  • PHP can send and receive cookies
  • PHP can add, delete, modify data in your database
  • PHP can be used to control user-access
  • PHP can encrypt data

With PHP you are not limited to output HTML. You can output images, PDF files, and even Flash movies. You can also output any text, such as XHTML and XML.

Why PHP?

  • PHP runs on various platforms (Windows, Linux, Unix, Mac OS X, etc.)
  • PHP is compatible with almost all servers used today (Apache, IIS, etc.)
  • PHP supports a wide range of databases
  • PHP is free. Download it from the official PHP resource: www.php.net
  • PHP is easy to learn and runs efficiently on the server side

What's new in PHP 7?

  • PHP 7 is much faster than the previous popular stable release (PHP 5.6)
  • PHP 7 has improved Error Handling
  • PHP 7 supports stricter Type Declarations for function arguments
  • PHP 7 supports new operators (like the spaceship operator: <=>)

What's new in PHP 8?

PHP 8.0 is a major update of the PHP language.

It contains many new features and optimizations including 

  • named arguments, 
  • union types, attributes, 
  • constructor property promotion, 
  • match expression, 
  • nullsafe operator, 
  • JIT, and improvements in the type system, 
  • error handling, and consistency.