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PHP Fundamentals

Welcome to the PHP Fundamentals repository! This repository is designed to help you learn and practice the basics of PHP programming language.

🚀 #PHP #PhpFundamentals #PhpBasic #OpenSource

learn PHP Fundamentals

PHP Basics :

1. Introduction:

  • PHP (Hypertext Preprocessor) is a server-side scripting language widely used for web development.
  • Executed on the server, PHP generates dynamic content before sending it to the browser.

2. Syntax:

  • PHP code is embedded within HTML.
  • Start with <?php and end with ?>.
<?php
   // PHP code here
?>

3. Variables:

In the context of mathematics, computer science, and programming, a variable is a symbolic name or identifier associated with a value that may be changed during the execution of a program. Essentially, it is a storage location (typically in computer memory) paired with an associated symbolic name (an identifier), which contains some known or unknown quantity or information referred to as a "value."

  • Prefix with $.
  • Case-sensitive.
  • No need to declare data types.
$name = "John";
$age = 25;

4. Data Types:

  • Strings, Integers, Floats, Booleans, Arrays, Objects, NULL.

5. Operators:

  • Arithmetic, Assignment, Comparison, Logical, Increment/Decrement.
$x = 10;
$y = 5;
$sum = $x + $y;

Control Structures:

6. Conditionals:

  • if, else, elseif.
$grade = 85;
if ($grade >= 60) {
   echo "Pass";
} else {
   echo "Fail";
}

7. Loops:

  • for, while, do-while, foreach.
for ($i = 0; $i < 5; $i++) {
   echo $i;
}

Functions:

8. Functions:

  • Reusable blocks of code.
  • Defined using function.
function greet($name) {
   echo "Hello, $name!";
}

9. Arrays:

  • Ordered maps.
  • Numerical and associative arrays.
$colors = array("Red", "Green", "Blue");
$info = array("name" => "John", "age" => 30);

File Handling:

10. File Handling:

  • Reading and writing to files.
$file = fopen("example.txt", "r");
echo fread($file, filesize("example.txt"));
fclose($file);

Database Connectivity:

11. Database Connection:

  • Using mysqli or PDO for database interactions.
$conn = new mysqli("localhost", "username", "password", "database");

Security:

12. Security:

  • Protect against SQL injection and XSS attacks.
  • Use prepared statements for database queries.
$stmt = $conn->prepare("INSERT INTO table (column) VALUES (?)");
$stmt->bind_param("s", $value);
$stmt->execute();

Conclusion:

These notes cover the basics of PHP, but there's much more to explore. PHP is versatile and widely used for web development, from simple scripts to complex applications.

For in-depth learning, refer to the official PHP Documentation and explore real-world projects. Happy coding!

License

This repository is licensed under the MIT License, allowing for widespread use and collaboration.

Contact

For any questions, feedback, or collaboration inquiries, feel free to reach out:

Feel free to customize the content as needed to better suit your repository and audience. Let me know if you need further assistance!