mirror of
https://github.com/ACSPRI/queXS
synced 2024-04-02 12:12:16 +00:00
99 lines
2.5 KiB
PHP
99 lines
2.5 KiB
PHP
<?php
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/**
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* LimeSurvey
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* Copyright (C) 2007 The LimeSurvey Project Team / Carsten Schmitz
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* All rights reserved.
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* License: GNU/GPL License v2 or later, see LICENSE.php
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* LimeSurvey is free software. This version may have been modified pursuant
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* to the GNU General Public License, and as distributed it includes or
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* is derivative of works licensed under the GNU General Public License or
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* other free or open source software licenses.
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* See COPYRIGHT.php for copyright notices and details.
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*
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* $Id: verification.php 4945 2008-05-29 17:01:48Z c_schmitz $
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*/
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// Security Checked: POST, GET, SESSION, REQUEST, returnglobal, DB
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// make sure you include this file only if the ImageCreate function does exist since it is an optional library
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// Lets get into the session
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session_start();
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// header for png
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Header("Content-Type: image/png");
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// Create Image
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$im = ImageCreate(75, 20);
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$white = ImageColorAllocate($im, 255, 255, 255);
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$black = ImageColorAllocate($im, 0, 0, 0);
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$red = ImageColorAllocate($im, 255, 0, 0);
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$blue = ImageColorAllocate($im, 0, 0, 255);
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$grey_shade = ImageColorAllocate($im, 204, 204, 204);
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// Create the random numberes
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srand((double)microtime()*1000000);
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$num1 = rand(1,5);
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$found = false;
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while ($found == false)
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{
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$num2 = rand(1,100);
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if (preg_match('/^[0-9]+$/', $num2/5))
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{
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$found = true;
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break;
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}
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}
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$font_c_rand = rand(1,3);
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if ($font_c_rand == 1)
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{
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$font_color = $black;
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} else if ($font_c_rand == 2)
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{
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$font_color = $red;
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} else if ($font_c_rand == 3)
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{
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$font_color = $blue;
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}
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$font_rand = rand(1,3);
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if ($font_rand == 1)
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{
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$font = "fonts/verabd.ttf";
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} else if ($font_rand == 2) {
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$font = "fonts/vera.ttf";
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} else if ($font_rand == 3)
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{
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$font = "fonts/verait.ttf";
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}
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$line_rand = rand(1,3);
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if ($line_rand == 1)
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{
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$line_color = $black;
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} else if ($line_rand == 2)
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{
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$line_color = $red;
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} else if ($line_rand == 3)
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{
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$line_color = $blue;
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}
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// Fill image, make transparent
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ImageFill($im, 0, 0, $grey_shade);
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//imagecolortransparent ($im, $white);
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imageline($im,0,0,0,20,$line_color);
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imageline($im,74,0,74,19,$line_color);
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imageline($im,0,0,74,0,$line_color);
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imageline($im,0,19,74,19,$line_color);
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// Write math question in a nice TTF Font
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ImageTTFText($im, 10, 0, 3, 16,$font_color, $font, $num1." + ".$num2." =" );
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// Display Image
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ImagePNG($im);
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ImageDestroy($im);
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// Add the answer to the session
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$_SESSION['secanswer'] = $num1+$num2;
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?>
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