Hash symbol in URL causes a problem

Code:

$id = $this->uri->segment(2);

...assuming that $this->uri->segment(2) is nothing but number, like I remapped it in routes.php

Never assume anything coming from user input. You should type-cast to integer to be safe and minimize risk of SQL injection:

PHP Code:

$id = (int)$this->uri->segment(2); 


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