Modern PHP: The Complete Guide - from Beginner to Advanced

Overview

A first PHP file and the `echo` command: Display text on a website

The Basics of Text Generation with PHP: Create dynamic background colors

The `include` command: Combine multiple PHP files

Variables in PHP: Store and access data dynamically

Test your knowledge of PHP Basics!

Project: Multi-Page Restaurant Website (Introduction)

Project: Multi-Page Restaurant Website (Refactoring)

Project: Multi-Page Restaurant Website (Displaying Data & Exercise)

Project: Multi-Page Restaurant Website (Sample Solution; Adding another Page)

How to deal with Error & Warning Messages in PHP?

Overview

Strings within Single Quotes & Combine Strings with the Dot (`.`) Operator

Strings within Double Quotes: Utilize Variable Substitution & Special Characters

Test your knowledge of Strings!

Numbers

Introduction: Coding Exercises in this course

Coding Exercises Tutorial (Part 1)

Coding Exercises Tutorial (Part 2)

Tips for Coding Exercises

The `var_dump` function: Inspect Variables

Online Shop Prices

Booleans & Comparison Operators: Compare Values

Test your knowledge of Numbers & Booleans!

The `if` statement: Direct Conditional Control Flows

The `else if` and `else` clauses: Expand Decision-making Options

Loyalty Points Evaluation (Part 1)

Loyalty Points Evaluation (Part 2)

The `isset`, `empty` and `unset` functions: Validate and Delete Variables

Alternative Syntax in PHP: Enhance Clarity in HTML Integration

Coffee Drink Selector

Boolean Operators: Craft More Complex Conditions with `!`, `&&`, `||`, `XOR`

Test your knowledge of Boolean Operators & Variable Validation!

Project: Restaurant Website Refinement (Exercise Instructions)

Restaurant Website Refinement (Sample Solution; dynamic titles and images)

Restaurant Website Refinement (Sample Solution; fixing the active menu)

Motivation

Create an Array and Access its Elements

Test the Existence of specific Keys and Values in Arrays

Test your knowledge of Array Basics!

Change, Delete and Append Elements to an Array

Giveaway Example: Select Winners from a List Randomly

Playlist Songs Manager (Part 1)

Playlist Songs Manager (Part 2)

Array Functions: Find Duplicate Elements and Sort Arrays

Test your Knowledge of Array Manipulation!

The `foreach` Loop: Iterate over Elements in an Array

Control Loops with `break` and `continue`

Workshop Attendance Coordination (Part 1)

Additional Array Functions

Workshop Attendance Coordination (Part 2)

Overview

Motivation & Define an Associative Array

Manipulate and Output Keys and Values form Associative Arrays

Test your Knowledge of Associative Arrays!

Best Practices for Managing Associative Arrays

Employee Salary Analysis (Part 1)

Employee Salary Analysis (Part 2)

Employee Salary Analysis (Part 3)

Overview

The short `if` Statement

The `$_GET` Array: Retrieve User Input from the URL

Dynamic URL Creation: Craft Links with Parameters and `http_build_query`

Test your Knowledge about URL Parameters

Submit a form through GET

Submit a form through POST

Test your Knowledge of Form Methods

Securing Websites: Prevent Cross-Site Scripting (XSS) with `htmlspecialchars`

Project: Secure Recipe App (Introduction & Setup)

Project: Secure Recipe App (Secure Input Handling & Exercise)

Project: Secure Recipe App (Sample Solution)

Overview & Code Base Walkthrough

The `rawurlencode` function: Ensure Safe Data Transmission in URLs (Hint)

CSS Attributes for Image Control: `object-fit` and `aspect-ratio` (Hint)

Project: Image Gallery - Part 1 (Display the Images in a Gallery View)

Project: Image Gallery - Part 2 (Design the Gallery Layout)

Project: Image Gallery - Part 3 (Implement the Image Page Contents)

Overview

Type Checking: Identify Types with `is_` Functions & Manage Mixed-Type Arrays

Type Casting: Solve Type Mismatches and Debug Code Errors Efficiently

The @ Symbol: Silence PHP Warnings

The Null Coalescing Operator: Simplify Default Value Assignments

Test your Knowledge of Controlling Variable Types

Optimizing `include`: Use __DIR__ for Reliable File Path Resolution

File Inclusions: `include`, `require`, and their `*_once` Variants

The functions `file_get_contents` and `readfile`

Test your knowledge about File Inclusions

The `implode` and `explode` functions: Split Strings and Merge Arrays

Personalized Email Newsletter (Part 1)

String Functions - Part 1 (`strlen`, `strtolower`, `trim`, `strpos`,...)

Personalized Email Newsletter (Part 2)

String Functions - Part 2 (`nl2br`, `str_replace`)

Personalized Email Newsletter (Part 3)

The index.php File: Directory Indexing and File Recognition on Webservers

Overview

Define a Nested Array and Access Multi-Level Data

Extract Data from Nested Arrays by `foreach` Loops

Test your knowledge of Nested Arrays

Navigate Multi-Level Data with Nested `foreach` Loops

Deal with Irregular Data in Nested Arrays

Marketing Campaign Tracker (Part 1)

Marketing Campaign Tracker (Part 2)

Marketing Campaign Tracker (Part 3)

Overview

Processing the Air Quality Data: Decode JSON & Handle .bzip2 Compression

Transforming JSON Data into Web Content: Create Dynamic City Links

Crafting City Statistics Pages: Retrieve Data & Handle Errors

Analyzing PM2.5 Data: Calculate Air Quality Index

Manage Data Integrity & Integrate Additional Measurement Parameters (PM10)

Polishing the Output: Add Numeric Formatting and Measurement Units

Integrating Chart.js with PHP - Part 1 (Build Interactive Visual Charts)

Integrating Chart.js with PHP - Part 2 (Implement Robust Data Transfer)

Ensuring Data Integrity: Deal with Missing Data

Overview

The `for` loop: Repeat Actions and Manage Iterations

Energy Consumption Forecast (Part 1)

The `while` loop: Execute Code with Conditional Repeats and Avoid Infinite Loops

Energy Consumption Forecast (Part 2)

Overview

Utilize `opendir`, `readdir`, and `closedir` for Directory Management

Using `readdir` in a while Loop: Read File Directories Efficiently

The `pathinfo` function: Extract File Path Components for Filtering File Types

File Functions: `file_exists`, `is_file`, `is_dir`, `filemtime`, `filesize`,...

Integrate Images with Descriptive Texts (Exercise Instructions)

Read Text Data for Image Descriptions (Sample Solution - Part 1)

Organize and Process Text Data Effectively (Sample Solution - Part 2)

Render Text Data on the Website (Sample Solution - Part 3)

Overview

Foundations: From Excel Spreadsheets to Database Tables

First steps with phpMyAdmin: Create new Databases and store Data

Primary Keys: Ensure Data Integrity with unique ID Columns

Auto_Increment: Generate unique IDs with ease

Export & Import Files in phpMyAdmin

Test your Knowledge of Databases

Overview

Setting up the Database and Table for the Notes App

Object Orientation in PHP: Manage Zip Files with Methods (Crash course)

Database Connections with PDO: Initialization & Best Practices

Troubleshooting: Database Connections with PDO

Data Retrieval with PDO: Fetch Data from a Database

Test your Knowledge of Database Connectivity with PDO

Rendering Fetched Data as HTML: Enhance Readability and Security

SQL Query Basics: Utilize the ORDER BY Clause and SELECT Specific Columns

Filter Data with the WHERE Clause and Fetch Individual Entries with PDO

Secure Parameter Handling in PDO: Prevent SQL Injection with Bind Methods

Insert Data Securely with INSERT INTO, Placeholders, and the `bindValue` Method

Database Manipulation: Using UPDATE and DELETE FROM Securely

Test Your Knowledge of Secure SQL Queries in PDO

Prevent Leakage of Database Connection Information in older (<=8.1) PHP Versions

Choosing the Charset: Ensure Compatibility with with utf8mb4 encoding

Overview

Design Files

Starting with the Design

Adding the Logo

Create the "New Entry" Button

Position the Button

Implement the Main Area

Create a Container

Design the Layout of the Card (Part 1)

Design the Layout of the Card (Part 2)

Design the Layout of the Card (Part 3)

Responsive Design

Implement the Pagination

Finish the Pagination

Add the Background (Part 1)

Add the Background (Part 2)

Add the Footer

Develop the Form (Part 1)

Develop the Form (Part 2)

Finishing Touches

Overview

Create the DataBase

Fetch Data from the DataBase

The form Page

Submit Data into the DataBase

Add Pagination

Generate Links

Dates (Part 1)

Dates (Part 2)

Format the Dates

Upload Files (Part 1)

Upload Files (Part 2)

How to Scale an Image?

Resize an Image and Upload

Implement Image Upload

Catch Invalid Uploads

Overview

The `$_SERVER` Array: Gain Insights about the Server running your PHP Script

HTTP Headers: Examine Browser to Server Communication

HTTP Headers: Examine Server to Browser Communication

Content-Type Header Example: Dynamically Serve CSS with PHP

Output Buffering: Avoid Header Issues and Ensure Seamless File Transmissions

Content-Disposition and Content-Length Header: Implement File Downloads

Location Header: Redirect Users to Files

Example: Build a Newsletter Sign-Up Page using Location Headers

Test your Knowledge of Headers in PHP

Decipher HTTP Status Codes: Success and Errors

Project: Craft a Custom 404 Error Page (Part 1)

Project: Create a Custom ErrorDocument (Part 2)

Overview

Declare and Invocate Custom Functions

Function Contexts and Parameter Passing: Transfer Data into Functions

Multiple Parameters & Default Values: Configure Functions

Test your knowledge about Functions

The `return` Statement: Extract Function Output

Multiple `return` Statements: Control Function Output

The `null` Type: Represent Missing Values

Function Redefinition: Best Practices

Example: Handling File Sizes with a Divide & Conquer Strategy

Event Scheduler for Online Conferences (Part 1)

Event Scheduler for Online Conferences (Part 2)

Overview

Typed Functions: Secure & Document your Code

Union Types: Enable Multiple Parameter Types

Return Types: Enforce Reliable Function Outputs

Nullable Types: Allow for Missing Values as Parameters

Strict Types: Enforce Accurate Type Handling

Test your knowledge about Typed Functions

Overview

Import the Data

Connect to DataBase

Navigation in the Header

List the names

DB Query in function

Move Function to a separate File

Solution: Develop the Name View

Polishing

DB query for overview

Generate an Overview Page

Output Buffering

Create a `render()` function

Passing Data into the `render()` function

Use the `render()` function

Highlight the Letter

Add Pagination (Part 1)

Add Pagination (Part 2)

Important: Improve DB performance with indexes

Important: Improve groupby performance

Fix a Bug

Overview

Intro to Regex: Search Patterns in Strings

Quantifiers: Control Repetitions for Powerful Pattern Matching

The `^` & `$` Anchors: Define String Boundaries

Test your knowledge of Regular Expressions

Bracket Expressions (Theory): Craft Custom Character Sets and Ranges

Bracket Expressions in Practice

Capture Groups: Extract Structured Data Elements

Text Transformations: Pattern-Based Edits with `preg_replace`

SEO & Accessibility Optimization

Overview

Limitations of Procedural Approaches: Setting the Stage for OOP

Classes in OOP: Create Custom Objects

Properties in a Class: Typing, Initialization, and Management

Class Methods: Define Behavior within Objects

Test your knowledge about Classes

Constructors: Ensure Proper Initialization of Object Properties

Simplifying Constructors: Efficient Initialization & Business Logic Integration

Example: Implement a Transfer Method for Transactions Between Bank Accounts

Securing Class Properties: From Public to Private Access

Securing Class Methods: From Public to Private Access

Hotel Room Digitalization (Part 1)

Hotel Room Digitalization (Part 2)

Hotel Room Digitalization (Part 3)

Overview

Create the Model Class

Add a Repository

Fetch Additional Columns

Show an individual City

Optimize the Code

Country to Flag Symbol (Bonus)

Add Flag to the Project

Implement Pagination (Exercise)

Implement Pagination (Solution)

Implement a Form

Update Entries

Add Password Protection (Bonus)

Overview

Namespaces in PHP: Organize Code and Avoid Naming Collisions

The `use` command: Simplify PHP Code with Namespaces

Class Names and Namespaces: Access, Resolution, and Instance Verification

Autoloading: Load Classes and Manage Namespaces Efficiently

Advanced Namespacing : Adopt PSR-4 Autoloading

Test your knowledge of Namespaces

Interfaces: Define and Implement for Enhanced Type Safety and Reusability

Social Media Publishing

Overview

Implement the App Frame

Show the Background

Implement the Top Bar

Visualize the Weather

Show the Weather Info

Final Polishing

Overview

Creating an Interface, first steps

Implementing the view code

Testing the design with random data

Fetching data with fsockopen

Accessing a remote weather API

Adding error handling

Final polishing

Overview

Intro to Inheritance: Extend Functionality From Parent Class

Set Up the Child Class Constructor for Effective Object Initialization

Inheritance & Property Accessibility: Navigate Properties Across Classes

Property Visibility: Private and Protected Properties for Secure Data Handling

The `parent` & `self` keywords: Precisely Reference Class Methods

Abstract Classes: Enforce Method Implementation for Reliable Code

E-Commerce Products Modeling (Part 1)

E-Commerce Products Modeling (Part 2)

Overview: Initial Setup

Develop the NotFoundController

Implement the Error Page

Overview: PagesController

Initiate the PagesController

Set up the Database

Create the PageModel and the PagesRepository

Add the 'About us' Page & Handle Errors

Render the Navigation Bar

Overview

Optimize Dependency Injection with Container Strategies

The `use` keyword: Weave external Data into Closures

Refactor the Container with an Instances Array

Refactor the Container with Unified Instance Creation

Implement a Recipes Array for Dynamic Instance Creation

Register the Recipes for Instance Creation outside the Container

Secure Instance Creation with Private `bind()` Functions

Test your knowledge of the Container Pattern

Enhanced Code Modularity: Utilize Return Values in File Inclusion

Utilize the Container Pattern in the CMS

Create the Admin Menu

Change the Colors in the Admin Area with CSS Variables (Bonus)

Add the PagesRepository to the PagesAdminController (Exercise)

Create the Overview Page for the Admin Area

Implement the Create Form for the Admin Area

Add Input Validation & Error Handling to the Create Form

Implement the Delete Functionality (Part 1)

Implement the Delete Functionality (Part 2)

Style Buttons as Links (Bonus)

Implement the Edit Feature (Exercise)

Implement the Edit Feature (Solution Part 1)

Implement the Edit Feature (Solution Part 2)

Overview & Named Arguments

The `setcookie()` Function: Create Cookies in PHP

Additional Parameters for `setcookie()`: Manage Cookies in PHP

Sessions in PHP: Secure Data with the `$_SESSION` Variable

Implement a Cookies Message (Bonus)

Test your knowledge of Cookies & Sessions

Overview

How to Safely Store a Password

Set up the Users Table

Create the Login Form

Validate the Login with the LoginController

Store the Login within the Session

Ensure Login with the authService

Prevent Starting Sessions Multiple Times

Implement the Logout Feature

Intro to Cross-Site Request Forgery (CSRF)

Protect against CSRF with Tokens (Part 1)

Protect against CSRF with Tokens (Part 2)

Protect against CSRF with Tokens (Part 3)

Conclusion of the CMS Project

Overview

Static Methods & Variables: Invoke Class Behavior & Share Data Without Instances

Constants: Define Global Options & Class-Attached Values with `define` & `const'

The Singleton Pattern: Ensure a Single Instance Throughout Your App

Magic Methods: Enhance Object Interaction and Property Management

ArrayAccess & Countable: Emulate Arrays with Interfaces

Test your knowledge of Advanced OOP Topics

Exception Handling: Safeguard Functions with Try-Catch Mechanisms

Custom Exceptions: Craft Precision Error Handling

Overview: Cleaner URLs with `mod_rewrite` in Apache

Configuration of `mod_rewrite`: Direct Images with Conditions and Exceptions

URL Handling with PHP and Apache: Redirect Requests

Exploring the `mod_rewrite` Documentation

Overview

Multibyte Characters: Measure String Lengths Accurately with `mb_strlen`

Advanced Multibyte String Functions: `mb_substr`, `mb_strpos`, `mb_ord`,...

Unicode Complexities: Safeguard Your Web Apps from Hidden Characters

Bonus: Intro to the symfony/string package

Convert non-UTF-8 strings with `mb_convert_encoding`

Database Encodings: The Critical Role of utf8mb4 in MySQL

Collations in MySQL: Uncover the Impact on Sorting and Searching

Intro to HTML: Headings, Paragraphs & Anchor Tags

Inline Elements vs Block Elements: Shape your Content

Intro to CSS: Change the Style of an HTML Element

From Inline Styles to CSS Files: Enhance Flexibility and Control

CSS Selectors: Select Elements by `id` and `class`

More Complex Selectors: Target Elements Precisely

The Block Model: Create Layouts with CSS

Embed Images and Style Inline-Block Elements

Structure HTML Pages with divs, spans, and Semantic Tags like header

Advanced Development with Packagist, Composer, and Frameworks (Symfony, Laravel)

Exploring Ready-Made Solutions: phpBB, Shopware, and Wordpress

PhpStorm: Optimize Your PHP Development Environment

Final Words