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If you are new to CodeIgniter you may be confused as to when you need to use get_instance and when you don't, it certainly tripped me up when I first came back to CodeIgniter after leaving the PHP community for some time.

Luckily it is pretty simple to remember.

If you are writing code that lives within a controller, a model or a view that is under CodeIgniter's control then you do not need to use get_instance.

If however you are writing your own custom libraries or something that sits outside of the MVC files then you do need to use it.

So, if you are inside a model you could do something like this;

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This uses Twitter Bootstrap classes for CodeIgniter pagination.

Drop this file into application/config.

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$tmp = $this->inventory_model->select('id')->as_array()->order_by($id, 'asc')->find_all();
$max = count($tmp);
echo $max;

//$tmp = $this->inventory_model->select('id')->as_array()->order_by($id, 'asc')->find_all();
//$max = end($tmp);

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$this->db->insert_id()
//The insert ID number when performing database inserts.

$this->db->affected_rows()
//Displays the number of affected rows, when doing “write” type queries (insert, update, etc.).

$this->db->last_query()
//Returns the last query that was run (the query string, not the result). Example:

$this->db->count_all()

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if (is_numeric($param)) {
	//TRUE
} 
else {
	//FALSE
}

if (!empty($param)) {
	//not empty
} 

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ucfirst(strtolower($row['name']));

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<img src="data:image/gif;base64,R0lGODlhAQABAAAAACw=" />

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//Load CSS files
Assets::add_css(
  array(  'bootstrap/bootstrap-3.3.7.min.css','font-awesome.css',
  'styles.css','mystyles.css',
  $data['scheme']
  )
);

//Put in header section
echo Assets::css();

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Header unset Set-Cookie

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<?php
Copied from http://fatlabmusic.com/blog/2009/08/12/how-to-fix-wp-http-error-name-lookup-timed-out/
//adjustments to wp-includes/http.php timeout values to workaround slow server responses
add_filter('http_request_args', 'bal_http_request_args', 100, 1);
function bal_http_request_args($r) //called on line 237
{
	$r['timeout'] = 15;
	return $r;
}