php - Implement SHA 512 Hash with Code Igniter -

i have controller: landingpage.php

<?php if ( ! defined('basepath')) exit('no direct script access allowed');  class landingpage extends ci_controller {      public function index(){           $data = array(             'head' => $this->load->view('landing_header', '', true),             'guts' => $this->load->view('landing_guts', '', true),             'foot' => $this->load->view('landing_footer', '', true)           );           $this->load->view('index', $data);     }      public function validateinput(){         #load libraries use         $this->load->helper("form");         $this->load->helper("form_validation");          /////////////////////////////////////////////////////////////////         /////////////////////// new user validation /////////////////////         /////////////////////// format validation :  ////////////////         ////////// "field name","error value","validation method" ///////         $this->form_validation->set_rules('fullname','your name','required|min_length[2]|max_length[20]');         $this->form_validation->set_rules('email','your email','required|valid_email|is_unique[users.email]');         $this->form_validation->set_rules('emailconf','email confirm','required|matches[email]');         $this->form_validation->set_rules('password','password','required|min_length[2]|max_length[20]');     } } 

i wondered how can implement sha 512 hashing had before when doing app procedurally, exept time in codeigniter??

isset($_post['password']) $dynamsalt = mt_rand(20,100);  $userpassword = hash('sha512',$dynamsalt.$userpassword); 

does code igniter have built in function this??? or similar?

does code igniter have built in function this?

no, since php - don't need one.

hash('sha512', $string); 

it can't easier or shorter that. why rewrite existing functionality?

however, hashing passwords in php suggest phpass:

http://www.openwall.com/phpass/