codeigniter4/CodeIgniter4

Features

• MVC Implementations - Organizes application logic into Models, Views, and Controllers for clean separation of concerns.
• Model-View-Controller Frameworks - Organizes application logic into models, views, and controllers for clean separation of concerns.
• Full-Stack Web Applications - CodeIgniter provides a lightweight MVC toolkit for building complete web applications with minimal configuration and a small footprint.
• Full-Stack Web Frameworks - Provides a complete MVC framework for building full-stack web applications with minimal configuration.
• PHP - CodeIgniter applies a PHP filter type to any retrieved input value to sanitize or validate the data.
• File Upload - CodeIgniter returns uploaded file data as structured objects, supporting single and multi-file retrieval.
• Form Validation - Validates submitted form data against rules and returns errors for any failing fields.
• PHP CLI Frameworks - Ships a complete CLI toolkit called Spark for code generation, migrations, and task scheduling.
• PHP Framework Helpers - Ships a comprehensive set of built-in helper functions for HTML generation, form creation, and text formatting.
• Server-Side Form Helpers - CodeIgniter provides functions to generate form elements, including inputs, selects, and buttons, with CSRF protection.
• PHP Security Libraries - Includes CSRF protection, XSS filtering, content security policy, and input validation tools.
• PHP Attribute Filters - Attaches one or more filters to a controller class or method using PHP attributes, with support for before/after execution and filter parameters.
• Mass Assignment Protected Saves - Provides model methods to insert or update records while enforcing a whitelist of allowed fields.
• Schema Versioning - CodeIgniter manages incremental schema updates as migration files so teams can apply and roll back changes consistently.
• Data Validation - Automatically runs configured validation rules on model data before saving to the database.
• Database Abstraction Layers - Provides a query builder, migrations, and schema management for multiple database drivers.
• Database Connection Configurations - Stores database credentials and connection settings in config files or environment variables.
• Database Operations - Provides a full database abstraction layer with query builder, transactions, and schema management.
• Select Query Builders - Constructs and executes SELECT statements with limit, offset, and WHERE clauses to retrieve records.
• Database Query Execution - Executes SQL queries using a query builder, transactions, and metadata retrieval with multiple driver support.
• Schema-Managed Querying - Executes SQL queries, builds queries programmatically, and manages database schema through migrations and seeding.
• Database Query Joins - Supports INNER, LEFT, RIGHT, and OUTER joins with ON conditions in queries.
• Record Updates - Provides a model method to modify rows by primary key using an associative array of data.
• Database Record Querying - Retrieves data from database tables using models and the query builder.
• Database Schema Managers - Ships a complete migration and schema manipulation toolkit for versioning and evolving database structures.
• Model Table Mappings - Maps model classes to database tables with automatic CRUD methods and validation.
• Database Transaction Management - CodeIgniter wraps a series of queries in a commit or rollback block to preserve data integrity on failure.
• Database Transactions - CodeIgniter groups multiple queries into an atomic unit that commits all changes on success or rolls them back on any failure.
• Entity Modeling - Represents database rows as entity objects with validation, events, and relationships.
• Primary Key Retrievals - Provides a model method to fetch rows by primary key, returning results in the configured format.
• Fluent Query Builders - Constructs SQL statements programmatically using a method chain, preventing manual string concatenation.
• Session Variable Stores - Reads and writes arbitrary key-value pairs to the session array using accessor methods.
• Pre-Save Validation Hooks - Automatically validates data against rules before insert, update, or save operations.
• MVC Controller-Model Writers - CodeIgniter organizes application logic into controller classes for handling requests and model classes for data interaction.
• Malicious URI Character Filters - CodeIgniter rejects requests containing dangerous characters in the URL path to prevent path traversal and injection attacks.
• Logical Grouping - Provides a fluent query builder with nested parenthetical WHERE clause grouping.
• Raw SQL Execution - Runs arbitrary SQL statements directly against the database and returns the result set.
• All-Record Retrievers - Provides a model method to retrieve all records from a table with limit and offset support.
• Result Ordering and Limiting - Orders result sets by specified columns and restricts returned rows with offset.
• Programmatic Schema Forge Tools - CodeIgniter applies schema changes such as creating, altering, and dropping tables through a programmatic forge tool.
• Server-Side Session Stores - Maintains user state across requests using server-side storage with configurable drivers.
• SQL Query Builders - Executes raw SQL statements against the connected database and returns results.
• SQL Literal Escaping - Automatically escapes values during SQL insert operations to prevent injection.
• WHERE Clause Builders - Adds conditions to queries using key/value pairs, arrays, custom strings, subqueries, or raw SQL.
• Application Error Handling - CodeIgniter catches PHP errors and exceptions and displays user-friendly error pages or logs them.
• CLI Command Frameworks - Provides a built-in CLI framework (Spark) for registering and running user-defined commands.
• CLI Command Registrars - Executes framework commands by passing their name and arguments to the spark script.
• Custom Command Definitions - Ships a Spark CLI toolkit that lets developers define custom commands by extending a base class.
• Code Organization - CodeIgniter structures application code into dedicated directories for controllers, models, views, configuration, and other components to enforce separation of concerns.
• Command-Line Scaffolding - Runs Spark commands for code generation, migrations, and controller execution from the terminal.
• Namespaced Configuration Classes - Defines application settings as public properties in namespaced class files for type-safe configuration.
• Database Administration CLI - Executes migration, seeding, and schema operations through terminal commands without a web interface.
• Automated Test Execution - Executes unit, database, controller, and HTTP tests with mocking and benchmarking to verify application behavior.
• Server-Side Form Helpers - CodeIgniter creates an HTML form tag with a site URL, optional attributes, hidden fields, and automatic CSRF protection when enabled.
• String Localization - Stores translatable text in language-specific files and retrieves it by key for the current locale.
• MVC Module Organizers - CodeIgniter organizes controllers, models, views, and config files into namespaced directories that act as self-contained mini-applications.
• HTTP-Verb Controller Generators - Generates controller classes with HTTP-verb-prefixed methods for handling GET, POST, PUT, and DELETE requests.
• RESTful Controller Bases - Ships a base controller class with pre-defined methods that correspond to standard CRUD resource routes.
• Custom Base Controllers - CodeIgniter creates a custom base controller that all other controllers inherit, centralizing shared logic and preloaded components.
• Server-Side RESTful Controllers - CodeIgniter creates API endpoints with controllers and auto-routing, returning consistent JSON responses via a response trait.
• SQL Query Executions - Executes raw SQL queries directly against the database and returns result objects or success booleans.
• Template Variable Outputs - Substitutes placeholders in view files with provided data values for dynamic output.
• HTTP Request Dispatchers - Sends HTTP requests to external services with full control over headers, body, and authentication.
• Global Helper Function Overrides - Provides a dedicated mechanism to override built-in global helper functions with custom implementations.
• Shared Class Instance Loading - Creates and returns shared or new class instances to reduce memory overhead by reusing object states.
• PSR-4 Namespace Autoloading - Implements PSR-4 autoloading to automatically load module classes by namespace without manual includes.
• Autoloading Specifications - Implements PSR-4 autoloading to resolve PHP classes on demand without manual includes.
• API Authentication - Provides API authentication to restrict access to endpoints using tokens and credentials.
• Input Security Functions - Provides built-in functions for input filtering, XSS cleaning, and other security tasks.
• Web Security - Blocks CSRF and XSS attacks with built-in security features including context-sensitive escaping and Content Security Policy.
• Authentication and Authorization - Provides a framework for verifying user identity and managing access permissions.
• Content Security Policies - CodeIgniter sets HTTP headers that restrict which scripts, styles, and resources the browser may load.
• Cross-Site Request Forgery Protections - Generates and validates a unique session token on state-changing requests to block cross-site forgery.
• Input Validation - Checks user-submitted values against defined rules and rejects malformed input before processing.
• Session State Tracking - Maintains a persistent state for each visitor by updating session data on every page load.
• Query Parameterization - Replaces placeholders in SQL strings with escaped values using positional and named bindings.
• Security Best Practices - Incorporates features and techniques that make it easy to follow good security practices without extra effort.
• Security Headers - CodeIgniter attaches HTTP response headers that help protect against common web vulnerabilities.
• CSRF Protections - Validates a token on state-changing requests to block forged submissions from malicious sites.
• Output Escaping - Automatically escapes variable values for HTML, attributes, CSS, or JavaScript contexts to prevent XSS.
• Parameterized Query Bindings - Separates SQL logic from user-supplied values so injected code cannot alter the query structure.
• User Authentication Systems - Provides a framework for verifying user identity and managing login/logout.
• Web Application Security - Provides built-in CSRF protection, XSS prevention, input validation, and configurable Content Security Policy headers.
• Application Configuration - Loads and reads configuration values from files and environment variables to control application behavior.
• Component Decoupling Patterns - CodeIgniter keeps each part of the system independent so they can be reused, replaced, or tested without affecting others.
• Validation Rule Engines - Sets one or more validation rules for a field using a pipe-delimited string or an array of rules.
• Dependency Injection Containers - Registers and retrieves shared service instances through a centralized container for loose coupling.
• MVC Controller Implementations - CodeIgniter organizes application logic into Models, Views, and Controllers for clean separation of concerns.
• Namespace Mappings - Resolves classes automatically by mapping namespace prefixes to directory paths without manual includes.
• Reusable Component Architectures - CodeIgniter provides classes and functions that each serve a single, narrow purpose for maximum clarity and reusability.
• Boilerplate Scaffolders - CodeIgniter scaffolds boilerplate files such as controllers, models, and migrations using built-in command-line generators.
• Service Instance Managers - Provides a centralized service container for registering and retrieving shared service instances.
• Service Replacement Mechanisms - CodeIgniter swaps a built-in class with a custom implementation by defining a factory method that returns a new instance.
• Error Logging Utilities - CodeIgniter writes application error messages to daily log files for later review and debugging.
• Severity-Level Log Writers - CodeIgniter records application events at eight severity levels (debug through emergency) to local log files for monitoring and debugging.
• Simulated Request Testing - Simulates HTTP requests and asserts responses during automated testing.
• Function Behavior Replacement - Provides a mechanism to replace default global helper functions with custom implementations.
• Test Utilities & Assertions - Provides built-in assertions, mocking utilities, and environment setup for unit, controller, and HTTP tests.
• HTTP Response Assertions - Checks controller or HTTP test results against conditions like status codes and content.
• HTTP Request Clients - Makes GET, POST, PUT, PATCH, DELETE, HEAD, or OPTIONS requests and returns structured responses.
• End-to-End Testing - Ships a testing toolkit that validates full application workflows across controllers, HTTP, CLI, and database layers.
• PHP Testing Frameworks - Ships a built-in testing toolkit with HTTP simulation, assertions, and mocking.
• Input Validation Rules - Validates user-submitted data against rules like required, email, min length, and custom callbacks.
• Input Sanitization Rules - CodeIgniter applies configurable sanitization rules to each incoming request field to strip or reject dangerous content.
• Plugin Templated View Rendering - Assembles HTML output from template files and returns it to the user's browser.
• Template Inheritance Layouts - Defines base templates with placeholders filled by child views for consistent page structure.
• Resource Presenter Controllers - Provides a base controller class with methods for rendering resource views and processing form submissions.
• URI-to-Controller Mappings - Associates an incoming URL path with a specific controller class and method to handle the request.
• API Endpoint Filters - Attaches filter classes to selected URI patterns so they run only on designated pages or API endpoints.
• Request & Response Handling - Processes incoming HTTP requests and generates appropriate responses for client-server communication.
• HTTP Request Handling - Processes incoming HTTP requests by parsing URIs, headers, and method spoofing to route them to controllers.
• Content Negotiation Utilities - CodeIgniter matches client preferences against server capabilities to return the best-suited media type, language, encoding, or character set.
• HTTP Response Builders - Provides utilities for constructing HTTP responses with status codes, headers, and body content.
• Content Negotiation - CodeIgniter selects the best matching language, media type, charset, or encoding from the client's Accept headers.
• Controller-Action Routing - Maps URI segments to controller classes and methods automatically, eliminating the need to define every route manually.
• Data Validation - Validates incoming data arrays against defined rules and returns a boolean success indicator.
• Dynamic View Rendering - Sends variables from controllers to view files for rendering in the response.
• Form Data Validation - Checks form input against defined rules and returns the form with errors on failure.
• Input Sanitizers - Strips or escapes dangerous characters from incoming data to prevent injection attacks and cross-site scripting.
• Lightweight Web Frameworks - CodeIgniter loads and executes only the components needed for each request, keeping the system small and fast by default.
• Resource-Based Routing - Maps standard CRUD operations to controller methods so a resource endpoint works automatically.
• Response Formatting - CodeIgniter detects the client's preferred format and returns the response as JSON or XML without manual configuration.
• RESTful API Development - Ships pre-built RESTful controllers with auto-routing and content negotiation for JSON and XML responses.
• Route Pattern Parsers - Provides route pattern parsing with named tokens for dynamic parameter extraction.
• Routing Libraries - Maps URLs to controller methods with support for auto-routing, resource routes, and route groups.
• HTTP Routing - Maps specific HTTP methods like POST to controller actions for precise request handling.
• Route Grouping - Wraps a set of routes inside a shared URI prefix to reduce repetition and apply common options.
• Convention-Based Mappings - Maps URI segments to controller classes and methods automatically without explicit route definitions.
• URL Construction - Constructs and parses URLs that map to specific controllers and methods within the application.
• URL Routing - Provides a configurable URL routing system that maps incoming requests to controller methods.
• Web Application Frameworks - CodeIgniter provides a rich set of libraries for common tasks and a simple interface to accelerate development beyond writing from scratch.
• View Rendering from Routes - Ships a feature to render view files directly from route definitions without a controller.
• CLI and Argument Parsing - Extracts positional path segments and named options from a command-line invocation for programmatic access.
• Email and Notifications - Composes and dispatches emails with attachments, HTML content, and multiple protocols.
• HTML Tag Helpers - CodeIgniter creates an HTML `` element for stylesheets or other linked resources, with full attribute control.
• API Response Caching - Stores generated API responses and serves cached copies to reduce server load.
• Manual Transaction Controls - CodeIgniter provides explicit begin, commit, and rollback calls for full control over the transaction lifecycle.
• Application Data Caches - Stores frequently accessed data in memory or file-based caches to reduce database load and speed up page delivery.
• Current User Identifiers - Provides a standard function to retrieve the currently logged-in user's unique identifier.
• Data Model File Generation - Creates a new model class file with database interaction methods from a command-line template.
• JSON Response Assertions - Validates JSON response structure and values during automated testing.
• Relational Resource Mapping - CodeIgniter loads and appends related data when the client specifies an include query parameter, using dedicated methods on the transformer.
• Client-Requested Resource Inclusions - CodeIgniter attaches nested related data to an API response only when the client explicitly requests it via a query parameter.
• Application-Level Casting Handlers - Registers custom handlers for transforming data between database and PHP representations.
• Property Cast Handlers - Registers custom handler classes that transform property values during get and set operations.
• Table Metadata Inspection - Displays field names, column types, and metadata for a specified database table from the CLI.
• Relational Database Metadata Inspectors - CodeIgniter reads schema information such as table lists, field names, and index details from the connected database.
• Slug-Based Record Retrieval - Filters database queries by URL slug to return a single matching record.
• Row Count Assertions - Verifies database row counts match expected values in test assertions.
• Database Seeding Tools - CodeIgniter populates database tables with sample records using seed scripts for development and testing environments.
• Nested Transactions - CodeIgniter allows transaction calls to be nested, with only the outermost block actually committing or rolling back.
• In-Memory Caches - Stores frequently accessed data in memory or on disk to reduce database queries and speed up page loads.
• Web Page Output Caching - Stores the fully rendered output of a page and serves it on subsequent requests until it expires.
• File-Based Session Stores - Persists session data to the filesystem using the default file handler.
• Memcached Session Stores - Persists session data in a Memcached store for high performance.
• Relational Database Session Stores - Persists session data in MySQL or PostgreSQL tables for direct access to session records.
• Index Management Operations - CodeIgniter removes a regular or unique index from a table.
• Computational Result Caching - Invokes a callback when a cache miss occurs, stores the result, and returns it on subsequent requests.
• Multi-Namespace Migration Executors - CodeIgniter discovers migration files across all registered namespaces and executes them together during each migration run.
• Migration File Generation - Creates a new database migration class file for versioning schema changes.
• Model Instantiation - Returns shared or new model instances with optional database connections.
• Pagination - CodeIgniter automatically splits a collection of resources into pages and returns a paginated response with a configurable page size.
• Controller Output Caches - Stores a controller method's response for a configurable duration, optionally with a custom cache key, to reduce repeated processing.
• Model-Bound - Provides a shared query builder pre-configured with the model's table for custom queries.
• Object Result Fetches - CodeIgniter fetches all matching rows from a query and returns them as an array of objects for iteration.
• Single Row Fetches - CodeIgniter fetches one row from a query result and returns it as a single object.
• Record Deletion - Removes records by primary key with support for soft-delete permanent removal.
• Record Insertion - Creates new rows from arrays or objects and returns the primary key.
• Upsert Operations - Inserts or updates records automatically by detecting primary key presence.
• Soft Deletion - Provides model support for marking records as deleted by setting a timestamp instead of removing them.
• Hard Deletion of Soft-Deleted Records - Permanently removes all rows that have been soft-deleted from the table.
• Soft-Delete Query Overrides - Temporarily overrides soft-delete filters to retrieve deleted or all rows.
• Row Existence Assertions - Checks whether database rows exist or are absent during automated tests.
• Application Debug Logging - Inspects and logs application variables and flow to diagnose issues during testing.
• Configurable Rule Groups - Stores reusable validation rule groups in configuration files for application-wide reuse.
• Non-Class File Autoloading - Loads procedural functions, constants, and bootstrap files from a configured list for global availability.
• Programmatic Command Invokers - Offers a helper function to invoke any CLI command programmatically from within application code.
• Modular - CodeIgniter groups related controllers, models, views, and configs into self-contained units for larger applications.
• Class Alias Definitions - Maps fully qualified class names to aliases for simplified access through the service container.
• Named Option Definitions - Returns the value of a specific named option passed on the command line.
• Database CLI Tools - Creates databases directly from the command line using a dedicated spark command.
• Environment Configuration Management - Switches configuration sets automatically based on the server environment (development, production, testing).
• Performance Benchmarking - Measures execution time of code segments to identify performance bottlenecks.
• Composer Library Packaging - Wraps reusable functionality into Composer packages for installation and autoloading in any project.
• Route Pattern Matching - Provides regular expression pattern matching in route definitions for flexible URL handling.
• Framework Debugging Toolbars - Shows a toolbar with benchmarks, queries, and request data for at-a-glance performance and debugging insight.
• Response Transformers - CodeIgniter formats resource data into a consistent array structure using a dedicated transformer class before encoding as JSON or XML.
• Multi-Segment URI Parameters - Provides the ability to capture multiple URI segments as a single parameter in route patterns.
• Controller Executions - Allows executing controller methods directly from the command line for automated testing and scripting.
• Redis-Backed Session Stores - Persists session data in a Redis store for high performance with TLS support.
• Authentication Integration - Adds user login, session management, and access checks by extending the framework's authentication system.
• Lifecycle Event Hooks - Registers custom code to run automatically at predefined points in the request lifecycle.
• Rate Limiting Algorithms - Implements a token bucket algorithm to restrict how many times an action can be performed within a time window.
• Route Priority Assignments - Provides numeric priority assignment for routes to control matching order.
• Per-Client Request Throttlers - Caps how many requests a single client may make in a time window and rejects excess traffic.
• Custom Request Headers - Sets arbitrary HTTP headers on test requests to simulate client metadata.
• Request Timeout Configurations - Limits how long a request may take to connect or complete, with an option to wait indefinitely.
• Query Parameter Encoders - Automatically formats and appends associative arrays as valid query strings to request URLs.
• Multi-Protocol Sending - Sends email using Mail, Sendmail, or SMTP protocols with TLS and SSL encryption.
• Hostname-Based Route Restrictions - Provides hostname-based route restrictions to limit request matching to specific domains or subdomains.
• Environment-Specific Route Restrictions - Provides environment-specific route restrictions to limit access based on the application environment.
• URI Construction and Parsing - CodeIgniter parses a full or partial URL into accessible parts like scheme, host, path, and query for programmatic manipulation.
• URI Segment Readers and Modifiers - CodeIgniter accesses or alters individual path segments by position, with optional default values and silent error handling.
• Controller File Generators - Creates a new controller class file from a command-line template to handle incoming HTTP requests.
• Native Class Subclassing - Adds new methods or overrides existing ones on a system class by subclassing it and registering the subclass through a service.
• Class Extensions - Replaces or inherits from built-in framework classes to alter internal behavior without modifying the original source.
• Core Class Replacements - Swaps a built-in system class with a custom implementation by ensuring autoloading, interface compliance, and service configuration.
• Custom Method Routings - Provides a mechanism to intercept and reroute all incoming requests through a custom controller method.
• Request-Level Preloaders - CodeIgniter loads helpers, models, libraries, and services in the base controller so they are available across every request without manual inclusion.
• Short Name Model Resolution - Resolves model classes from module namespaces using short class names.
• Composer Module Packaging - Packages reusable code modules as Composer packages for installation and sharing across projects.
• Caching Interfaces - Provides standard cache interfaces for storing and retrieving cached data, enabling interoperability with compatible libraries.
• Database Value Casting - Converts database values to native PHP types like int, bool, and datetime automatically.
• Property Type Casting - Automatically casts entity properties to integer, boolean, array, JSON, or enum types.
• Worker Mode Runtimes - Supports handling multiple requests within a single PHP process using FrankenPHP.
• Controller Filters - CodeIgniter executes custom logic before a controller method runs, allowing request modification or early termination.
• Post-Controller Hooks - CodeIgniter executes custom logic after a controller method runs, allowing response modification or final processing.
• Field Whitelists - CodeIgniter limits which fields or related resources a client may request by defining whitelists in the transformer class.
• Character Escaping - Converts HTML special characters in form values to prevent breakage from quotes and special characters.
• Content Security Policy Nonce Support - CodeIgniter produces the nonce attribute for script or style tags to enforce Content Security Policy.
• Controller Filters - Runs one or more before/after filters on a specific route for authentication, logging, or other middleware tasks.
• Filter Parameterizations - CodeIgniter supplies configuration values to a filter at the point of assignment so the same filter can behave differently per route.
• Cross-Origin Resource Sharing Policies - Configures which external origins may access server resources and blocks unauthorized cross-origin requests.
• Cross-Origin Security Policies - Configures allowed origins, methods, and headers so browsers permit requests from other domains.
• Cryptographic Key Generation - Creates a pseudo-random key of a specified length using the operating system's secure random source.
• URI Exemptions - CodeIgniter skips a filter for specific URI patterns while keeping it active for all other requests.
• Host and Environment Restrictions - CodeIgniter limits controller access to specific hostnames, subdomains, or application environments using a declarative attribute.
• Encryption Key Management - Keeps old keys available for decrypting legacy data while using a new key for fresh encryption operations.
• File Type Validators - Applies file-specific validation rules like size, dimensions, MIME type, and extension to uploads.
• Personal Access Tokens - Issues and validates bearer tokens for stateless API client authentication.
• Data Encryption - Transforms data into an unreadable format using a cipher so only authorized parties can decrypt it.
• Stream Encryption and Decryption - Encrypts plaintext with a chosen cipher and key, then decrypts ciphertext back to the original message.
• Request Authentication - Provides HTTP Basic and Digest authentication for securing endpoints.
• Request Throttling - Limits how many requests a client can make in a time window to prevent API abuse.
• Role-Based Access Control - Assigns roles with granular permissions and checks them on each request to restrict access.
• Runtime CSP Modifications - CodeIgniter modifies Content Security Policy directives dynamically in controllers through the response object's CSP instance.
• Security Logging Management - CodeIgniter records security-relevant actions and errors to a persistent store for later review and incident analysis.
• Session Authentication - Manages user login and session persistence using server-side sessions for stateful authentication.
• Security Configuration Auditing - Provides automated scanning of application settings and PHP environment for insecure defaults.
• Closure Route Handlers - Provides the ability to use closures as direct route handlers without a controller class.
• Dot-Notation Nested Validators - Validates fields within nested associative arrays using dot-notation and wildcards.
• Field Value Placeholders - Substitutes placeholders in validation rules with actual submitted field values at runtime.
• Controller Subdirectory Organizers - CodeIgniter structures controllers into nested directories under app/Controllers, with the first URI segment selecting the sub-directory.
• Lifecycle Event Callbacks - Allows registering custom methods that run before or after model insert, update, find, and delete operations.
• Log Event Enrichment - Inserts dynamic values like user IDs or IP addresses into log messages using placeholder substitution.
• Module Functionality Extenders - Replaces or augments built-in classes and functions with custom implementations without modifying the framework.
• Namespace-Based Module Auto-Discovery - Automatically discovers module routes, events, filters, and services by scanning registered namespaces.
• Plugin Extenders - Allows core framework components to be easily extended or completely swapped to match custom requirements.
• Service Container Extensions - Replaces or augments built-in classes and functions with custom implementations through the service container and events system.
• Lifecycle Event Hooks - Fires custom code at predefined points in the request lifecycle using a publish-subscribe pattern.
• URI Dash-to-Underscore Translations - Provides automatic conversion of hyphens to underscores in URI segments for controller matching.
• Single Value Validators - Validates individual values against rules without requiring a full data array.
• Persistent - Configures which framework services persist across requests to improve performance.
• Namespace-Based Service Auto-Discovery - Automatically discovers and registers module service definitions by scanning registered namespaces.
• Severity Level Filtering - Sets a minimum severity threshold or selects specific levels to control which messages are written to the log.
• Output Capture Utilities - Captures STDOUT and STDERR output for verifying CLI command content in tests.
• Stream Output Capture for Testing - Captures PHP stream output for inspection during test assertions.
• CLI Input Simulations - Provides a mechanism to simulate user keystrokes for testing interactive CLI commands.
• Static Analysis - CodeIgniter integrates static analysis tools and testing frameworks to detect bugs and enforce code quality automatically.
• Controller Isolations - Provides a dedicated method to test controllers in isolation with simulated requests.
• Test Assertion Extensions - Includes extended assertions for verifying events, headers, execution times, and accessing private methods.
• Session State Assertions - Asserts session values after controller requests during HTTP testing.
• Database Seeders - Creates a new database seeder class file to populate tables with test or default data.
• Virtual Time Testing - Fixes or changes the current time during testing for predictable time-dependent code.
• Property Accessor Methods - Invokes custom setter and getter methods automatically to enforce validation or transformation.
• Named Content Sections - Wraps content in named blocks that automatically replace placeholders in parent layouts.
• Custom Validation Messages - Assigns field-specific custom error messages to validation rules with dynamic tag support.
• Custom Fake Data Formatters - Overrides default Faker output with model-specific logic for test data generation.
• Inline Callback Rules - Defines validation rules as inline callbacks within controllers for ad-hoc checks.
• Interface Text Localization - Replaces language strings in views with translations based on the user's locale setting.
• Locale Detection - Determines the correct language for a request through content negotiation or URL segments.
• Locale-Aware Value Formatting - Replaces placeholders in language strings with locale-aware numbers, dates, and times.
• Partial View Inclusions - Embeds separate view files as reusable components that can be inserted into any page.
• View Data Inheritance - Sets variables on the view object so they are available to all nested sections and partials.
• Route Definitions - Provides a method to define routes for presentation controllers that return views and process forms.
• Body Manipulators - Provides interfaces for accessing and modifying the content of HTTP request and response bodies.
• HTTP Header Manipulators - Provides functions for adding, modifying, or removing HTTP header fields in requests or responses.
• Component Caching - Stores a rendered component's output for a configurable number of seconds, serving the cached version on subsequent calls.
• Controller-Based Organization - CodeIgniter groups controller files into nested folders under the main controllers directory for larger applications.
• Base Controller Hierarchies - CodeIgniter defines separate base controllers for different application sections, such as public and admin, to organize distinct shared functionality.
• Immutable Date Conversions - Automatically converts date columns into immutable Time objects with locale-aware formatting.
• Reusable View Components - Renders self-contained PHP classes that return HTML for injection into parent views.
• HTTP Status Code Management - CodeIgniter returns appropriate HTTP status codes and structured JSON payloads for success, creation, deletion, and error conditions.
• Dot Notation Field Accessors - CodeIgniter reads a single value or nested value from a JSON request body using dot notation.
• Request Body Attachers - Allows sending raw strings, form-encoded parameters, or JSON data as the body of an HTTP request.
• JSON Response Formatters - Converts arrays of data into JSON strings and sets the Content-Type header to application/json.
• XML Response Formatters - Converts arrays of data into XML strings and sets the Content-Type header to application/xml.
• Route Grouping - Places one route group inside another to create hierarchical URI structures with merged options.
• Multi-Verb Route Matchers - Accepts a route that matches any of several specified HTTP methods in a single definition.
• Module Controller Routings - Provides routing to controllers within module namespaces using namespace-prefixed route groups.
• Route Naming Systems - Assigns a human-readable name to a route so links can be generated by name instead of by path.
• Named Route Redirects - Returns a RedirectResponse that sends the client to a URI resolved from a named route or controller method.
• Auto-Routing Toggles - Forces the router to use only explicitly defined routes and ignore automatic controller discovery.
• Session Flash Messaging - Marks session data to be available only for the next request, ideal for status or error messages.
• Template Logic - Evaluates if/elseif/else blocks with standard PHP operators inside template files.
• URL Generators - Builds a full URL from config, appending index page and optional URI segments for portable local links.
• Base URL Mappers - Returns the configured base URL, optionally appending URI segments or file paths.
• Current URL Readers - Returns the full URL of the page being viewed, derived from config settings rather than the browser URL.
• CLI-Only Routes - Creates routes that are reachable only from the command line and ignored by web requests.
• Redirection Rules - Issues an HTTP redirect to a different URI or named route when the original route is matched.
• Relative URI Redirects - Returns a RedirectResponse that sends the client to a specific URI path relative to the base URL.
• Previous Page Redirects - Returns a RedirectResponse that sends the client back to the last page viewed during the session.
• Logging Interfaces - CodeIgniter implements all interfaces from the PSR-3 Logger Interface standard for structured logging.
• Developer Tools - Lightweight MVC framework for web development.
• Php Projects - Listed in the “Php Projects” section of the Awesome For Beginners awesome list.

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