Diagnosing 404 Errors in CodeIgniter 4: Routing & Rewrite Checklist
A concise 404‑diagnosis guide for CodeIgniter 4. Check .htaccess, base_url, routes, and server rewrites to fix clean‑URL failures quickly.
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Diagnosing and Optimizing CodeIgniter 4 Pagination Performance
When CodeIgniter 4’s built‑in pagination slows on large tables, pinpointing the culprit is vital. This guide walks through the symptoms, a concise cause table, ordered checks, targeted fixes, and when to ask for help.
SEO-Friendly Pagination in CodeIgniter 4 Without Rewriting Queries
CodeIgniter 4's Paginator service handles page math and link generation, but you still own the total count, route shape, and view markup. Here is how to wire SEO-friendly pagination with minimal configuration and a publishable theme.
CodeIgniter 4 Pagination with Query Builder: How paginate() Works and Where It Breaks
How CodeIgniter 4's paginate() works under the hood — the count query, LIMIT/OFFSET generation, pager links, and the join and base-URL mistakes that silently break it.
codeigniterSecure Database Queries with CodeIgniter 4 Query Builder: A Practical Guide
Learn how to use CodeIgniter 4’s Query Builder for secure, database‑agnostic CRUD operations with automatic value escaping, plus verification steps and recovery tactics.
Designing with CodeIgniter 4’s Dependency Injection Container
Learn how to register and resolve services in CodeIgniter 4, balance singleton and prototype scopes, and avoid common pitfalls like circular dependencies.
CodeIgniter 4: MySQLi vs PDO – Decision Guide
A practical comparison of MySQLi and PDO drivers in CodeIgniter 4 helping you choose the right database driver.
Custom CSRF Token Name Validation for AJAX and Form Requests in CodeIgniter 4
Custom CSRF Token Name Validation for AJAX and Form Requests in CodeIgniter 4 Goal: Configure a custom csrfTokenName in app/Config/Security.php so CodeIgniter 4 validates POST, PUT, PATCH, and DELETE requests consistently whether the token arrives in a hidden form field or an X-CSRF-TOKEN header. Constraint: The Security middleware appears to prioritize the
Which CI 4 hook point reliably intercepts requests during zero-downtime migration?
When migrating a small CodeIgniter 4 application with zero-downtime requirements, the goal is to coordinate request routing, environment configuration, and service class availability across coexisting old and new code paths. CI 4's hook points and configurable base URLs provide mechanisms for phased rollout, yet their interaction during concurrent request ha