An Introduction To PHP

What is PHP?

• PHP stands for Hyper Text Preprocessor.
• It is an Open-Source widely used scripting language.
• It works on server side scripting language.
• It is easy to use and free to download.

What is PHP File?

• It the combination of HTML, CSS, and JavaScript, along with PHP Code.
• It has an extension as ".php".

Why PHP?

• It supports and runs on various platfoms (Windows, Linux, Unix, etc.).
• It is compatible with all servers used to date (XAMPP, Apache, etc.).
• It supports a wide range of databases.
• It is free to download from the official site of PHP:www.php.net.

PHP Syntax

 

Basic PHP Syntax

• The PHP script starts with<?phpand it ends with?>
• It can be placed anywhere in the document..
  
  
  <?php
     //PHP Code

  ?>

• Here is the  first most basic coding for PHP.
• I have written the basic code to print "ALL THE BEST".

Is PHP Case-Sensitive?

• In PHP, classes, functions, keywords (eg: echo, if, else, etc..), user-defined functions are case sensitive.

PHP Comments

• The Comment lines are used to make the code more understandable and for ease of use.
• Mostly, Command lines let others understand your code.
• Most programmers have a habit of looking back on their own code for future reference.
• The comment lines helps you to remind you what you were thinking, when you wrote the code.

Two types of Comment Lines

• Single Line Comment(// , #)
  

  <?php
    // This is a single-line comment
    # This is also a single-line comment
  ?>

• Multiple Line Comment (/*...*/
  

  <?php
    /*
      This is a multiple-lines comment
    */
  ?>

These are all the basics for an Introduction to PHP.

 

Here I have attached example coding for the above topics. Kindly refer to it.

 

Thank you!.