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CodeIgniter Strong Password Validation

CodeIgniter Strong Password Validation

When You are going to create a Registration Form then You should make sure that users always must have a strong password. It's quite easy to create a Strong password Validation with CodeIgniter, by using the Form Validation Library and REGEX.

For example, Set the minimum and maximum length of the password, It should contain a lowercase, uppercase, numbers, and special chars. You can also easily make sure that the data entered in the password field Should be equal to password confirmation field.

An example password policy could be:

  • Required
  • Lowercase
  • Uppercase
  • Number
  • Special Chars


<!DOCTYPE html> <html> <head> <title>Strong Password Validation</title> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> </head> <body> <div class="container-fluid "> <div class="row"> <div class="col-md-9 offset-md-1"> <div class="user_about_content_box"> <div class="tab-pane"> <h3>Strong Password Validation</h3> </div> <div class="col-md-8"> <?php if($this->session->flashdata('success')) { echo "<span class='text-success' style='font-weight:bold'>".$this->session->flashdata('success')."</span>"; } ?> </div> <form method="post" action="<?php echo base_url('passwordcontroller/index'); ?>"> <div class="col-md-8"> <div class="form-group" id="prime_cat"> <input type="email" value="<?php echo set_value('email'); ?>" name="email" class="form-control input-group-lg" placeholder="Email"> </div> <?php if(form_error('email')){echo "<span style='color:red'>".form_error('email')."</span>";} ?> <div class="form-group" id="prime_cat"> <input type="text" value="<?php echo set_value('new_password'); ?>" name="new_password" class="form-control input-group-lg" placeholder="New Password"> </div> <?php if(form_error('new_password')){echo "<span style='color:red'>".form_error('new_password')."</span>";} ?> <div class="form-group" id="prime_cat"> <input type="password" value="<?php echo set_value('confirm_password'); ?>" name="confirm_password" class="form-control input-group-lg" placeholder="Confirm Password"> </div> <?php if(form_error('confirm_password')){echo "<span style='color:red'>".form_error('confirm_password')."</span>";} ?> <div class="form-group col-md-12"> <input class="btn btn-primary" type="submit" value="Create account"> </div> </div> </form> </div> <!--Content box ends--> </div> </div> </div> </div> </body> </html>


<?php defined('BASEPATH') OR exit('No direct script access allowed'); class PasswordController extends CI_Controller { public function index() { $rules = array( [ 'field' => 'email', 'label' => 'Email', 'rules' => 'required', ], [ 'field' => 'new_password', 'label' => 'New Password', 'rules' => 'callback_valid_password', ], [ 'field' => 'confirm_password', 'label' => 'Confirm Password', 'rules' => 'matches[new_password]', ], ); $this->form_validation->set_rules($rules); if($this->form_validation->run()==FALSE) { $this->load->view('PasswordValidation'); } else { $this->session->set_flashdata('success','Congrates '); redirect(base_url('PasswordController/index')); } } //Create strong password public function valid_password($password = '') { $password = trim($password); $regex_lowercase = '/[a-z]/'; $regex_uppercase = '/[A-Z]/'; $regex_number = '/[0-9]/'; $regex_special = '/[!@#$%^&*()\-_=+{};:,<.>ยง~]/'; if (empty($password)) { $this->form_validation->set_message('valid_password', 'The {field} field is required.'); return FALSE; } if (preg_match_all($regex_lowercase, $password) < 1) { $this->form_validation->set_message('valid_password', 'The {field} field must be at least one lowercase letter.'); return FALSE; } if (preg_match_all($regex_uppercase, $password) < 1) { $this->form_validation->set_message('valid_password', 'The {field} field must be at least one uppercase letter.'); return FALSE; } if (preg_match_all($regex_number, $password) < 1) { $this->form_validation->set_message('valid_password', 'The {field} field must have at least one number.'); return FALSE; } if (preg_match_all($regex_special, $password) < 1) { $this->form_validation->set_message('valid_password', 'The {field} field must have at least one special character.' . ' ' . htmlentities('!@#$%^&*()\-_=+{};:,<.>ยง~')); return FALSE; } if (strlen($password) < 5) { $this->form_validation->set_message('valid_password', 'The {field} field must be at least 5 characters in length.'); return FALSE; } if (strlen($password) > 32) { $this->form_validation->set_message('valid_password', 'The {field} field cannot exceed 32 characters in length.'); return FALSE; } return TRUE; } //strong password end }
Output(validation error)
Output(validation success message)

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