<?php session_start(); if(isset($_GET['message']) && $_GET['message']==1){ $message="Erreur saisir un code correct"; //echo $message; /*echo ici ou ailleurs dans la page*/ }else{ $message=NULL; } ?> <form method="post" action="verif.php"> " /> <?php echo $message;?> </form>
<?php session_start(); if(isset($_POST['code']) && isset($_SESSION['code']) && $_POST['code']===$_SESSION['code']){ echo ''; print_r($_POST); /*du form.php*/ echo ' '; echo 'ça marche'; /*un traitement*/ /* mail(); mysql_connect() ... */ }else{ $_SESSION['nom'] = $_POST['nom'] ; header('Location: form.php?message=1');exit; } ?>
<?php if(isset($_GET['message']) && $_GET['message']==1){ $message="Erreur saisir un code correct"; //echo $message; /*echo ici ou ailleurs dans la page*/ }else{ $message=NULL; } ?> <form method="post" action="verif.php"> " /> " /> <?php echo $message;?> </form>
<?php session_start(); if(isset($_POST['code']) && isset($_SESSION['code']) && $_POST['code']===$_SESSION['code']){ echo ''; print_r($_POST); /*du form.php*/ echo ' '; echo 'ça marche'; /*un traitement*/ /* mail(); mysql_connect() ... */ }else{ header('Location: form.php?message=1');exit; } ?>
<?php session_start(); /* * File: CaptchaSecurityImages.php * Author: Simon Jarvis * Copyright: 2006 Simon Jarvis * Date: 03/08/06 * Updated: 07/02/07 * Requirements: PHP 4/5 with GD and FreeType libraries * Link: http://www.white-hat-web-design.co.uk/articles/php-captcha.php * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details: * http://www.gnu.org/licenses/gpl.html * */ class CaptchaSecurityImages { var $font = 'arial.ttf'; function generateCode($characters) { /* list all possible characters, similar looking characters and vowels have been removed */ $possible = '23456789bcdfghjkmnpqrstvwxyz'; $code = ''; $i = 0; while ($i < $characters) { $code .= substr($possible, mt_rand(0, strlen($possible)-1), 1); $i++; } return $code; } function CaptchaSecurityImages($width='120',$height='40',$characters='6') { $code = $this->generateCode($characters); /* font size will be 75% of the image height */ $font_size = $height * 0.75; $image = imagecreate($width, $height) or die('Cannot initialize new GD image stream'); /* set the colours */ $background_color = imagecolorallocate($image, 255, 255, 255); $text_color = imagecolorallocate($image, 20, 40, 100); $noise_color = imagecolorallocate($image, 100, 120, 180); /* generate random dots in background */ for( $i=0; $i<($width*$height)/3; $i++ ) { imagefilledellipse($image, mt_rand(0,$width), mt_rand(0,$height), 1, 1, $noise_color); } /* generate random lines in background */ for( $i=0; $i<($width*$height)/150; $i++ ) { imageline($image, mt_rand(0,$width), mt_rand(0,$height), mt_rand(0,$width), mt_rand(0,$height), $noise_color); } /* create textbox and add text */ $textbox = imagettfbbox($font_size, 0, $this->font, $code) or die('Error in imagettfbbox function'); $x = ($width - $textbox[4])/2; $y = ($height - $textbox[5])/2; imagettftext($image, $font_size, 0, $x, $y, $text_color, $this->font , $code) or die('Error in imagettftext function'); /* output captcha image to browser */ header('Content-Type: image/jpeg'); imagejpeg($image); imagedestroy($image); $_SESSION['code'] = $code; } } $width = isset($_GET['width']) && $_GET['width'] < 600 ? $_GET['width'] : '120'; $height = isset($_GET['height']) && $_GET['height'] < 200 ? $_GET['height'] : '40'; $characters = isset($_GET['characters']) && $_GET['characters'] > 2 ? $_GET['characters'] : '6'; $captcha = new CaptchaSecurityImages($width,$height,$characters); ?>
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