Code: PHP

Arrows & Double Arrows

->, =>, and ?-> chains

Null Coalescing

??, ??=, and elvis-style defaults

Strings & Interpolation

Curly interpolation, concatenation, and heredocs

Array Syntax

Spreads, destructuring, and nested literals

Checkpoint: Symbol Fluency

Dollars, arrows, and ?? in one longer drill

Keywords

Reserved words

Declarations

Variables and constants

Interfaces & Traits

implements, use, and final classes

Enums & Match

Backed enums and match expressions

Idiomatic Patterns

Modern PHP one-liners

Array Function Toolkit

array_column, usort, and the spaceship

Checkpoint: Keywords & Idioms

A named-constructor value object with match

Control Flow

Loops and branches

Functions & Methods

Typed functions

Exceptions & Finally

Named constructors for domain errors

File & JSON I/O

JSON_THROW_ON_ERROR round trips

Generators & yield

Streaming a log file line by line

Realistic Snippet

Enum and readonly class

PDO Prepared Statements

Bound parameters done safely

Checkpoint: Real Snippets

Readonly objects, array functions, and sprintf in one pass

Speed Run: Config Loader

A key=value parser typed end to end without stopping

Speed Run: Array Pipeline

Filter, usort, and slice at full pace

Speed Run: Match Router

A tiny HTTP router built on match(true)

Speed Run: Input Validation

filter_var and friendly error maps

Speed Run: PHPUnit Suite

A slugify helper plus its tests

Checkpoint: Sustained Speed

An event-latency report typed in one continuous run

Assessment Sim 1: Shopping Cart

A complete readonly-class cart program

Assessment Sim 2: Reading Stats

A full STDIN-to-summary program

Assessment Sim 3: RPN Calculator

A complete stack evaluator with error paths

Assessment Sim 4: Inventory Ledger

A full stock-movement program with rejections

Checkpoint: PHP Mastery Final

A ranked traffic report -- the course's graded final