CodeQuest
Roadmap
L1.1: Hello World
L1.2: Display Your Name
L1.3: Display Multiple Lines
L1.4: Combine Text (Concatenation)
L1.5: Mini Project: Welcome Page
L2.1: Create a Variable
L2.2: Store Numbers and Calculate
L2.3: Combine Variables in Text
L2.4: Variable Types & Booleans
L2.5: Mini Project: Personal Info Card
L3.1: Comparison Operators
L3.2: If-Else Branching
L3.3: Multiple Conditions with Elseif
L3.4: Logical AND (&&) & OR (||)
L3.5: Final Project: Age Checker
L4.1: For Loop Basics
L4.2: While Loop Countdown
L4.3: Foreach Loop
L4.4: Break and Continue
L4.5: Final Project: Number Generator
L5.1: Create & Access Indexed Arrays
L5.2: Add Values to an Array
L5.3: Associative Key-Value Arrays
L5.4: Looping Associative Arrays
L5.5: Final Project: Product List
L6.1: Write Your First Function
L6.2: Function Parameters
L6.3: Return Values
L6.4: Default Parameter Values
L6.5: Final Project: Simple Calculator
L7.1: Create an HTML Form
L7.2: Reading $_POST Data
L7.3: Form Validation (Empty Check)
L7.4: Sanitizing Form Inputs
L7.5: Final Project: Contact Form
L8.1: URL Query Parameters with $_GET
L8.2: Null Coalescing Operator (??)
L8.3: HTTP Method Detection
L8.4: Filtering Input with filter_input / filter_var
L8.5: Final Project: Search Form
L9.1: Encode PHP Array to JSON
L9.2: Decode JSON String into PHP Array
L9.3: Append Item to JSON List
L9.4: Pretty Print JSON
L9.5: Final Project: JSON Notes System
L10.1: Starting a PHP Session
L10.2: Reading Session Values
L10.3: Protecting Pages with Session Auth
L10.4: Destroying Sessions (Logout)
L10.5: Final Project: Simple Login Session
L11.1: Password Hashing with Bcrypt
L11.2: Verifying Hashes with password_verify
L11.3: Preventing XSS with htmlspecialchars
L11.4: Generating CSRF Tokens
L11.5: Final Project: Secure Login System
L12.1: Writing Files with file_put_contents
L12.2: Reading Files with file_get_contents
L12.3: Appending to Files with FILE_APPEND
L12.4: File Extension Validation
L12.5: Final Project: Safe File Upload Practice
L13.1: JSON Response Header
L13.2: HTTP Response Status Codes
L13.3: API Input Body Parser
L13.4: Standardized API Response Wrapper
L13.5: Final Project: Simple JSON API
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<?php $price = 50; $quantity = 3; // Calculate total and display it
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