Codeigniter 4 Post Problem

You may also need to use all lowercase for the file names, depending on the server.

No. The file and the class name must start with a capital letter. 

See the doc: https://codeigniter4.github.io/userguide...ello-world

The file must be called ‘Helloworld.php’, with a capital ‘H’.
Controller class names MUST start with an uppercase letter and ONLY the first character can be uppercase.

---

PHP Code:

<form  action="<?php echo base_url('Controller/Method'); ?>" method="POST" enctype="multipart/form-data" >

// So if your controller is Ekle and your method is ekle it would be like this/
<form  action="<?php echo base_url('ekle/ekle'); ?>" method="POST" enctype="multipart/form-data" > 


This depend on how the routes are defined. If auto routing is turned off this won't work either. 

PHP Code:

$routes->setAutoRoute(false); 


https://codeigniter4.github.io/userguide...uting.html