🔧 CodeIgniter 4 CSRF Protection in AJAX Forms — The Complete Fix

Difficulty: Intermediate | Read time: 12 min | Framework: CodeIgniter 4







Why CSRF Breaks Your AJAX Forms


You build a perfectly working AJAX form. It works fine in testing. Then suddenly — "Page Expired" or a 419 error. You refresh, it works once, then breaks again.

This is CodeIgniter 4's CSRF protection doing its job — but if you...