PHP Learning Modules

Covers script anatomy, PHP opening tags, console stream output with echo and print, documentation comments, PSR-12 indentation, and CLI execution with $argc and $argv.

Explores primitive scalar types (int, float, string, bool, null), explicit type casting, dynamic type juggling, and strict scalar type enforcement via declare(strict_types=1).

Implements arithmetic, compound assignment, strict equality (===), short-circuit logic, increment/decrement, string concatenation, null coalescing (??), and nullsafe chaining (?->).

Structures decision trees using if-elseif-else ladders, switch-case dispatching, truthy/falsy evaluation, and modern PHP 8+ expression-based match patterns.

Manages iterative control flow via counted for loops, condition-controlled while loops, foreach key-value traversal, jump controls (break/continue), and geometric number patterns.

Examines indexed arrays, associative hash maps, multidimensional matrices, stack/queue operations, functional pipelines (array_filter, array_map, array_reduce), sorting, and destructuring.

Processes text via slicing, PHP 8 search primitives (str_contains), formatting with sprintf, Heredoc/Nowdoc templates, UTF-8 multibyte handling (mbstring), and regex pattern validation.

Authors modular functions supporting default values, named arguments, variadic parameters (...), argument unpacking, union types, lexical closures (use), and first-class callables.

Implements classes, properties, constructors (__construct), destructors, access modifiers, encapsulation, static members, constructor property promotion, readonly properties, and magic methods.

Leverages class inheritance, method overriding, final modifiers, abstract classes, interfaces, traits with collision resolution (insteadof, as), late static binding, and dependency injection.

Utilizes DateTimeImmutable, timezones, CSPRNG secure randomness (random_int), JSON serialization, SPL iterators, memory-efficient generators (yield), Fibers, and property hooks paradigms.

Constructs resilient systems using try-catch-finally, custom domain exception hierarchies, exception chaining ($previous), the Throwable interface, assertions, filter_var, and error logging.

Performs low-level stream I/O (fopen, fgets), atomic file utilities (file_get_contents, file_put_contents), directory traversals, temporary files, tabular CSV parsing, and JSON storage.

Integrates PHP with HTML templates, inspects superglobals ($_GET, $_POST, $_SERVER, $_SESSION, $_COOKIE), handles form validation, prevents XSS with htmlspecialchars, and builds routers.

Connects to relational engines via PDO, prevents SQL injection with prepared statements, executes ACID transactions, paginates records, queries JOIN relations, and manages SQLite migrations.

Structures professional applications using namespaces, PSR-4 autoloading, composer.json manifests, .env loaders, centralized configs, and Model-View-Controller (MVC) architecture.

Implements password hashing (bcrypt), session hardening, CSRF defense, RBAC authorization, standardized JSON REST APIs, RFC 7807 error formatting, and PHPUnit-style test runners.

Synthesizes concepts into 6 full-featured applications: OOP Calculator, SQLite Student Manager, Inventory Restock Monitor, POS Cashier, Library Manager, and Authenticated REST API.