Topic: PHP Basics – Part 1 of 10: Introduction and Syntax

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1. What is PHP?

• PHP (Hypertext Preprocessor) is a widely-used, open-source server-side scripting language designed for web development.

• Embedded in HTML and used to create dynamic web pages, manage databases, handle forms, sessions, and more.

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2. Why Use PHP?

• Easy to learn and integrates seamlessly with HTML.

• Works well with MySQL and popular servers like Apache or Nginx.

• Supported by major CMS platforms like WordPress, Drupal, and Joomla.

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3. PHP Syntax Overview

• PHP code is written inside <?php ... ?> tags.

<?php
  echo "Hello, World!";
?>

• Every PHP statement ends with a semicolon (`;`).

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4. Basic Output with `echo` and `print`

<?php
  echo "This is output using echo";
  print "This is output using print";
?>

• echo is slightly faster; print returns a value.

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5. PHP Variables

• Variables start with a dollar sign (`$`) and are case-sensitive.

<?php
  $name = "Ali";
  $age = 25;
  echo "My name is $name and I am $age years old.";
?>

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6. PHP Comments

// Single-line comment
# Also single-line comment
/* Multi-line
   comment */

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7. Summary

• PHP is a server-side scripting language used to build dynamic web applications.

• Basic syntax includes echo, variables with $, and proper use of <?php ... ?> tags.

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Exercise

• Write a simple PHP script that defines two variables ($name and $age) and prints a sentence using them.

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#PHP #WebDevelopment #PHPTutorial #ServerSide #Backend

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