Vaibhav Rathod's Notes

PHP

6 min read

History & Intro

- This is server side Scripting-launguage
- use Build dynamic web pages
- Run on Server
- Use for - Speed, Simplicity , Flexibility
- PHP first name - Personal Home Page Then > PHP Hypertext Preprocessor

  • Notes

    • Php contains html , css,js. php
    • For comment use ”//” or ” /**/ “

    • Import tags

      • ” - and PHP
      • echo - Returns multiple string
      • Print - return single String and return value

    • Variables

      • IMP

        collapsed:: true
        • $_GET = Data Is appended To the URL , Not SECURE , char Limit , Bookmark Is possible w/ value , Better for search page - Technically it array
        • $_POST = Data is packaged inside the body of the HTTP request , MORE SECURE , No data limit , Cannot bookmark , GET request are not cached , Better collapsed:: true for submitting credentials
      • You can catch data for more conveniat use collapsed:: true

    • Opraters

      • Arithmetic operators collapsed:: true
        • collapsed:: true 
          // Arithmetic
$sum        = 1 + 1; // 2
$difference = 2 - 1; // 1
$product    = 2 * 2; // 4
$quotient   = 2 / 1; // 2
 
// Shorthand arithmetic
$num = 0;
$num += 1;       // Increment $num by 1
echo $num++;     // Prints 1 (increments after evaluation)
echo ++$num;     // Prints 3 (increments before evaluation)
$num /= $float;  // Divide and assign the quotient to $num

          • perenthisis

            collapsed:: true
            • () > ** > * > / > % > + > -

    • Logical op

    • if - else statement

      • Switch - Statement collapsed:: true

    • Loops

      • For loop
      • While loop collapsed:: true
      • Do while loop
      • Foreach loop collapsed:: true

    • Array

    • Math Operations

    • Funtions

      • This use for make code block Run particular time
      • We don’t need Re-write code just call it

    • String Methods

      • Privent atteck - Filter methods

        collapsed:: true
        • include() - copies the content of a file (php/html/text) and inclued in PHP File. collapsed:: true
          • use for Code resubility like header , Fotter
        • cookie() - Informstion about a user stored in a user’s Web-browser. collapsed:: true

      • session

        collapsed:: true
        • SGB used to store information on a user to be used across multiple pages.
        • A user is assigned a session-id
        • ex- login credentials
        • This is useful for pass data in global

      • Server

        collapsed:: true
        • SGB That contains headers, paths, and script locations
        • THE entries in this array are created by the wev server.
        • $_SERVER - use this

      • hashing

        collapsed:: true
        • this is method to pass sensitive data in
        • this useful for atteck
        • trafring sesitive data into letters, numbers and/or symbols via a methematical process.

      • connet to mySQL

        collapsed:: true
        • There are 2 Type to connet collapsed:: true
          • MySQLi Extension logseq.order-list-type:: number
          • PDO (PHP Data Objects ) logseq.order-list-type:: number
          • logseq.order-list-type:: number

  • Libs & Framework

    • Laravel: A modern, MVC-based PHP framework with built-in tools for routing, authentication, ORM, and task scheduling. Highly favored for its elegant syntax and developer-friendly ecosystem.
    • Symfony: A robust and flexible PHP framework for large-scale enterprise applications. It’s known for its reusable components, stability, and widespread use in the PHP community.
    • CodeIgniter: A lightweight, fast, and simple PHP framework for building dynamic web applications. Ideal for beginners or when you need to get projects up and running quickly.
    • Yii: A high-performance, component-based PHP framework that is perfect for developing large-scale applications. It comes with built-in features like caching, authentication, and security.
    • Zend Framework (Laminas): A professional PHP framework that offers a set of reusable components and libraries. It’s ideal for enterprise-grade applications and services.
    • Composer: The PHP dependency manager that makes it easy to manage libraries and packages. It’s essential for managing project dependencies in modern PHP development.
    • PHPMailer: A library for sending emails from PHP, with support for attachments, HTML messages, SMTP authentication, and more.
    • Guzzle: A powerful HTTP client for PHP, ideal for making HTTP requests to APIs or web services. It supports synchronous and asynchronous requests.
    • Monolog: A comprehensive logging library for PHP, allowing you to log messages to various handlers (files, databases, email, etc.) in a standardized format.
    • Carbon: A popular PHP date and time library that extends PHP’s native DateTime class with a wide range of useful methods for date manipulation and formatting.
    • Twig:A flexible, fast, and secure templating engine for PHP, designed to separate the logic of your application from the presentation layer.
    • Intervention Image: A simple and easy-to-use image handling and manipulation library for PHP, with support for resizing, cropping, filters, and more.
    • Doctrine ORM: A powerful and flexible Object-Relational Mapping (ORM) library for PHP, used to map database entities to PHP objects, easing database interaction.
    • PHPUnit: A testing framework for PHP that helps developers write unit tests and perform test-driven development (TDD). It supports assertions, mocking, and code coverage analysis.
    • Slim: A lightweight micro-framework for PHP that is perfect for building small and simple RESTful APIs or web applications. It focuses on simplicity and performance.
    • Lumen: A micro-framework by the creators of Laravel, designed for building fast and lightweight APIs. It uses the same core components as Laravel but with less overhead.
    • Firebase PHP SDK : A library to integrate Firebase services (such as Firestore, Authentication, and Push Notifications) with your PHP applications.
    • JWT (Firebase JWT): A simple PHP library for working with JSON Web Tokens (JWT), often used for authentication and secure data transmission in APIs.
    • PHPStan: A static analysis tool for PHP that helps find bugs in your code without running it. It checks for type safety, dead code, and potential issues in your codebase.
    • Xdebug: A PHP extension for debugging and profiling. It allows you to step through your code, inspect variables, and trace execution flow to make development easier.
    • Ratchet: A PHP WebSocket library for real-time, bi-directional communication between the server and client. It supports websockets and provides a framework for building chat systems or live data feeds.
    • Flysystem: A filesystem abstraction library for PHP, enabling you to work with different storage systems (local, Amazon S3, FTP, etc.) using a unified API.
    • Faker: A library for generating fake data in PHP, useful for testing, seeding databases, or populating forms with realistic data.

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