How to use captcha in codeigniterCreate a controller
application/controllers/captcha.php
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');class Captcha extends CI_Controller { public function __construct() { parent:: __construct(); $this->load->helper("url"); $this->load->helper('form'); $this->load->helper('captcha'); $this->load->library('form_validation'); } public function index() { //validating form fields $this->form_validation->set_rules('username', 'Email Address', 'required'); $this->form_validation->set_rules('user_password', 'Password', 'required'); $this->form_validation->set_rules('userCaptcha', 'Captcha', 'required|callback_check_captcha'); $userCaptcha = $this->input->post('userCaptcha'); if ($this->form_validation->run() == false){ // numeric random number for captcha $random_number = substr(number_format(time() * rand(),0,'',''),0,6); // setting up captcha config $vals = array( 'word' => $random_number, 'img_path' => './captcha_images/', 'img_url' => base_url().'captcha_images/', 'img_width' => 140, 'img_height' => 32, 'expiration' => 7200 ); $data['captcha'] = create_captcha($vals); $this->session->set_userdata('captchaWord',$data['captcha']['word']); $this->load->view('captcha', $data); }else { // do your stuff here. echo 'I m here clered all validations'; } } public function check_captcha($str){ $word = $this->session->userdata('captchaWord'); if(strcmp(strtoupper($str),strtoupper($word)) == 0){ return true; } else{ $this->form_validation->set_message('check_captcha', 'Please enter correct words!'); return false; } }} |
Create a view
application/views/captcha.php
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | <html><head><title>Adding a Captcha!</title></head><body><h1>Captcha Example</h1><?php echo form_open('captcha'); ?><div class="formSignIn" > <div class="form-group"> <input autocomplete="off" type="text" id="username" name="username" placeholder="User Email" value="<?php if(!empty($username)){ echo $username;} ?>" /> <span class="required-server"><?php echo form_error('username','<p style="color:#F83A18">','</p>'); ?></span> </div> <div class="form-group"> <input autocomplete="off" type="password" id="user_password" name="user_password" placeholder="User Password" value="" /> <span class="required-server"><?php echo form_error('user_password','<p style="color:#F83A18">','</p>'); ?></span> </div> <div class="form-group"> <label for="captcha"><?php echo $captcha['image']; ?></label> <br> <input type="text" autocomplete="off" name="userCaptcha" placeholder="Enter above text" value="<?php if(!empty($userCaptcha)){ echo $userCaptcha;} ?>" /> <span class="required-server"><?php echo form_error('userCaptcha','<p style="color:#F83A18">','</p>'); ?></span> </div> <div class="form-group"> <input type="submit" class="btn btn-success" value="Sign In" name="" /> </div></div><?php echo form_close(); ?></body></html> |
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