CI class Pagination links trouble - php

Question

This is the code i currently have.
P.S. I am currently editing this, trying to solve this problem whilst waiting for someone to solve it here. Im not quite sure why this is happening.
Pagination:
$character = $this->uri->segment(3);
$config['base_url'] = base_url() . 'index.php/Controller/function/'.$character;
$config['total_rows'] = $this->Model->browse_total_rows();
$config['per_page'] = 1;
$config['num_links'] = 10;
$config['uri_segment'] = 4;
$this->pagination->initialize($config);
if(!is_numeric($character)){$data['records'] = $this->Model->get_records_filtered($character,$config['per_page'],$this->uri->segment(4));}
else{ $data['records'] = $this->Model->get_records($config['per_page'], $this->uri->segment(3));}
$data['links'] = $this->pagination->create_links();
$this->load->view('browse', $data);
Whenever i go to my browse page, instead of being on the page 1 of my page on pagination. it is defaulted that im on page 2. Why? because i see this as my link.
1 2 3 >
Plus, i can't click on link 2 but i can on link 1. I don't know if this is how pagination_links works. but i find it odd. Anyways, im not sure if its related to my other problem.
The character part is for the letter chosen, so for example i only want to view results with A as their first letter the url should be.
index.php/controller/function/A/
So the per page of the pagination will be placed on the 4th segment. It has no error that way. But when i don't click on any letter and just show all results.
Whenever i click on a link(per page). The url looks like this.
index.php/controller/function/2/
but when i click on the next page, it goes as
index.php/controller/function/2/4
so basically breaks the pagination and retrieves no result.
I have tried other solutions like adding IF/else statement that if character is null or not equal to range('A','Z') then the $config['base_url'] should have no .$character on the end and the uri_segment should be on 3rd. But it still goes the same as above.
EDIT:
The 2nd problem was solved, i used something like this.
$character = $this->uri->segment(3);
$Alphabet = range('A','Z');
$flag = 0;
for($i=0;$i<26;$i++)
{
if($character==$Alphabet[$i])
{
$flag +=1;
}
}
Seems like, if($character==range('A','Z')) doesnt work as only now noticed when i echoed that range returns results of array so i had to loop. is there any better way to check than what ive done above?

Answer 1

With your pagination config, you have the pagination segment set to 4 regardless of the whether a letter is specified or not. But it should be 3 when there is no character if I'm understanding correctly.
Try something like this:
if(!is_numeric($character)) {
$config['uri_segment'] = 4;
$data['records'] = $this->Model->get_records_filtered($character,$config['per_page'],$this->uri->segment(4));
} else {
$config['uri_segment'] = 3;
$data['records'] = $this->Model->get_records($config['per_page'], $this->uri->segment(3));
}
$this->pagination->initialize($config);
For checking for a character in the range, you can use
if (in_array(strtoupper($character), range('A', 'Z'))
The strtoupper() is optional. Leave it in if you want 'a' to match 'A'.