<?php /** * eGroupWare eTemplate Extension - captcha - based on secureimage - www.phpcaptcha.org * * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License * @package etemplate * @subpackage extensions * @link http://www.egroupware.org * @author Randy Houlahan randy@roadwarriors.ca */ /** * Captcha Widget * * Using secureimage a captcha test is generated using etemplates. Image refresh and audio files<br /> * are generated as well*/ class ajax_captcha_widget { var $public_functions = array( 'pre_process' => True, 'post_process' => True, 'show_image' => True, 'play_sound' => True, ); var $human_name = 'Captcha'; // this is the name for the editor private $debug = false; function __construct($ui='') { $this->img = new securimage(); switch($ui) { case '': case 'html': $this->ui = 'html'; break; default: echo "UI='$ui' not implemented"; } return 0; } /** * pre-processing of the extension * * This function is called before the extension gets rendered * * @param string $name form-name of the control * @param mixed &$value value / existing content, can be modified * @param array &$cell array with the widget, can be modified for ui-independent widgets * @param array &$readonlys names of widgets as key, to be made readonly * @param mixed &$extension_data data the extension can store persisten between pre- and post-process * @param object &$tmpl reference to the template we belong too * @return boolean true if extra label is allowed, false otherwise */ function pre_process($name,&$value,&$cell,&$readonlys,&$extension_data,&$tmpl) { //sets main etemplate cell with data created in etemplate.captcha_widget $cell['type'] = 'template'; $cell['size'] = $cell['name']; $widget = new etemplate('etemplate.captcha_widget'); $widget->no_onclick = True; $cell['obj'] = &$widget; $refresh_image_wig =& $widget->get_widget_by_name('etemplate/refresh.gif'); $refresh_image_wig['size'] = 'etemplate.captcha_widget.show_image'; $refresh_image_wig['onclick']=' document.getElementById(\'show_image\').src = \''.$GLOBALS['egw_info']['server']['webserver_url'].'/index.php?menuaction=etemplate.ajax_captcha_widget.show_image&sid=\' + Math.random(); return false;'; $value = array('captcha'=>'','captcha_code'=>''); //set needed onload for refresh JS egw_framework::set_onload('document.getElementById(\'show_image\').src = \''.$GLOBALS['egw_info']['server']['webserver_url'].'/index.php?menuaction=etemplate.ajax_captcha_widget.show_image&sid=\' + Math.random(); return false' ); // sets audio icon link properties $audio_image_wig =& $widget->get_widget_by_name('etemplate/audio_icon.gif'); $audio_image_wig['size'] = 'etemplate.ajax_captcha_widget.play_sound'; // sects code text field to be needed $code_text_wig =& $widget->get_widget_by_name('captcha_code'); //$code_text_wig['name']=$name; $code_text_wig['needed'] = 1; return True; // no extra label } /** * postprocessing method, called after the submission of the form * * It has to copy the allowed/valid data from $value_in to $value, otherwise the widget * will return no data (if it has a preprocessing method). The framework insures that * the post-processing of all contained widget has been done before. * * Only used by select-dow so far * * @param string $name form-name of the widget * @param mixed &$value the extension returns here it's input, if there's any * @param mixed &$extension_data persistent storage between calls or pre- and post-process * @param boolean &$loop can be set to true to request a re-submision of the form/dialog * @param object &$tmpl the eTemplate the widget belongs too * @param mixed &value_in the posted values (already striped of magic-quotes) * @return boolean true if $value has valid content, on false no content will be returned! */ function post_process($name,&$value,&$extension_data,&$loop,&$tmpl,$value_in) { // sends user back to form if no code entered if ($value_in[captcha_code]=='' || !isset($value_in[captcha_code])) { $loop=TRUE; return false; } // sends uder back to form with err msg if wrong code if ($this->img->getCode() != $value_in[captcha_code]) { $tmpl->set_validation_error('captcha',lang(" Your code is incorrect !!!")); $loop=TRUE; return false; } }//post process /** * Public function to return a new image and set the code in the sessions var from within the class * * @return new image */ function show_image() { return $this->img->show(); } /** * Return new wav file * @return new wav file */ function play_sound() { header('Content-type: audio/x-wav'); header('Content-Disposition: attachment; name="securimage.wav"'); echo $this->img->getAudibleCode(); } }//widget /** * Project: Securimage: A PHP class for creating and managing form CAPTCHA images<br /> * File: securimage.php<br /> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or any later version.<br /><br /> * * This library 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 * Lesser General Public License for more details.<br /><br /> * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA<br /><br /> * * Any modifications to the library should be indicated clearly in the source code * to inform users that the changes are not a part of the original software.<br /><br /> * * If you found this script useful, please take a quick moment to rate it.<br /> * http://www.hotscripts.com/rate/49400.html Thanks. * * @link http://www.phpcaptcha.org Securimage PHP CAPTCHA * @link http://www.phpcaptcha.org/latest.zip Download Latest Version * @link http://www.phpcaptcha.org/Securimage_Docs/ Online Documentation * @copyright 2007 Drew Phillips * @author drew010 <drew@drew-phillips.com> * @version 1.0.3.1 (March 24, 2008) * @package Securimage * */ /** ChangeLog 1.0.3.1 - Error reading from wordlist in some cases caused words to be cut off 1 letter short 1.0.3 - Removed shadow_text from code which could cause an undefined property error due to removal from previous version 1.0.2 - Audible CAPTCHA Code wav files - Create codes from a word list instead of random strings 1.0 - Added the ability to use a selected character set, rather than a-z0-9 only. - Added the multi-color text option to use different colors for each letter. - Switched to automatic session handling instead of using files for code storage - Added GD Font support if ttf support is not available. Can use internal GD fonts or load new ones. - Added the ability to set line thickness - Added option for drawing arced lines over letters - Added ability to choose image type for output */ /** * Output images in JPEG format */ define('SI_IMAGE_JPEG', 1); /** * Output images in PNG format */ define('SI_IMAGE_PNG', 2); /** * Output images in GIF format * Must have GD >= 2.0.28! */ define('SI_IMAGE_GIF', 3); /** * Securimage CAPTCHA Class. * * @package Securimage * @subpackage classes * */ class Securimage { /** * The desired width of the CAPTCHA image. * * @var int */ var $image_width = 175; /** * The desired width of the CAPTCHA image. * * @var int */ var $image_height = 45; /** * The image format for output.<br /> * Valid options: SI_IMAGE_PNG, SI_IMAGE_JPG, SI_IMAGE_GIF * * @var int */ var $image_type = SI_IMAGE_PNG; /** * The length of the code to generate. * * @var int */ var $code_length = 4; /** * The character set for individual characters in the image.<br /> * Letters are converted to uppercase.<br /> * The font must support the letters or there may be problematic substitutions. * * @var string */ var $charset = 'ABCDEFGHKLMNPRSTUVWYZ23456789'; //var $charset = '0123456789'; /** * Create codes using this word list * * @var string The path to the word list to use for creating CAPTCHA codes */ var $wordlist_file = '/etemplate/templates/default/words/words.txt'; /** * True to use a word list file instead of a random code * * @var bool */ var $use_wordlist = true; /** * Whether to use a GD font instead of a TTF font.<br /> * TTF offers more support and options, but use this if your PHP doesn't support TTF.<br /> * * @var boolean */ var $use_gd_font = true; /** * The GD font to use.<br /> * Internal gd fonts can be loaded by their number.<br /> * Alternatively, a file path can be given and the font will be loaded from file. * * @var mixed */ var $gd_font_file = '/etemplate/templates/default/gdfonts/automatic.gdf'; /** * The approximate size of the font in pixels.<br /> * This does not control the size of the font because that is determined by the GD font itself.<br /> * This is used to aid the calculations of positioning used by this class.<br /> * * @var int */ var $gd_font_size = 20; // Note: These font options below do not apply if you set $use_gd_font to true with the exception of $text_color /** * The path to the TTF font file to load. * * @var string */ var $ttf_file = "./elephant.ttf"; /** * The font size.<br /> * Depending on your version of GD, this should be specified as the pixel size (GD1) or point size (GD2)<br /> * * @var int */ var $font_size = 24; /** * The minimum angle in degrees, with 0 degrees being left-to-right reading text.<br /> * Higher values represent a counter-clockwise rotation.<br /> * For example, a value of 90 would result in bottom-to-top reading text. * * @var int */ var $text_angle_minimum = -20; /** * The minimum angle in degrees, with 0 degrees being left-to-right reading text.<br /> * Higher values represent a counter-clockwise rotation.<br /> * For example, a value of 90 would result in bottom-to-top reading text. * * @var int */ var $text_angle_maximum = 20; /** * The X-Position on the image where letter drawing will begin.<br /> * This value is in pixels from the left side of the image. * * @var int */ var $text_x_start = 8; /** * Letters can be spaced apart at random distances.<br /> * This is the minimum distance between two letters.<br /> * This should be <i>at least</i> as wide as a font character.<br /> * Small values can cause letters to be drawn over eachother.<br /> * * @var int */ var $text_minimum_distance = 30; /** * Letters can be spaced apart at random distances.<br /> * This is the maximum distance between two letters.<br /> * This should be <i>at least</i> as wide as a font character.<br /> * Small values can cause letters to be drawn over eachother.<br /> * * @var int */ var $text_maximum_distance = 33; /** * The background color for the image.<br /> * This should be specified in HTML hex format.<br /> * Make sure to include the preceding # sign! * * @var string */ var $image_bg_color = "#e3daed"; /** * The text color to use for drawing characters.<br /> * This value is ignored if $use_multi_text is set to true.<br /> * Make sure this contrasts well with the background color.<br /> * Specify the color in HTML hex format with preceding # sign * * @see Securimage::$use_multi_text * @var string */ var $text_color = "#ff0000"; /** * Set to true to use multiple colors for each character. * * @see Securimage::$multi_text_color * @var boolean */ var $use_multi_text = true; /** * String of HTML hex colors to use.<br /> * Separate each possible color with commas.<br /> * Be sure to precede each value with the # sign. * * @var string */ var $multi_text_color = "#0a68dd,#f65c47,#8d32fd"; /** * Set to true to make the characters appear transparent. * * @see Securimage::$text_transparency_percentage * @var boolean */ var $use_transparent_text = true; /** * The percentage of transparency, 0 to 100.<br /> * A value of 0 is completely opaque, 100 is completely transparent (invisble) * * @see Securimage::$use_transparent_text * @var int */ var $text_transparency_percentage = 15; // Line options /** * Draw vertical and horizontal lines on the image. * * @see Securimage::$line_color * @see Securimage::$line_distance * @see Securimage::$line_thickness * @see Securimage::$draw_lines_over_text * @var boolean */ var $draw_lines = true; /** * The color of the lines drawn on the image.<br /> * Use HTML hex format with preceding # sign. * * @see Securimage::$draw_lines * @var string */ var $line_color = "#80BFFF"; /** * How far apart to space the lines from eachother in pixels. * * @see Securimage::$draw_lines * @var int */ var $line_distance = 5; /** * How thick to draw the lines in pixels.<br /> * 1-3 is ideal depending on distance * * @see Securimage::$draw_lines * @see Securimage::$line_distance * @var int */ var $line_thickness = 1; /** * Set to true to draw angled lines on the image in addition to the horizontal and vertical lines. * * @see Securimage::$draw_lines * @var boolean */ var $draw_angled_lines = false; /** * Draw the lines over the text.<br /> * If fales lines will be drawn before putting the text on the image.<br /> * This can make the image hard for humans to read depending on the line thickness and distance. * * @var boolean */ var $draw_lines_over_text = false; /** * For added security, it is a good idea to draw arced lines over the letters to make it harder for bots to segment the letters.<br /> * Two arced lines will be drawn over the text on each side of the image.<br /> * This is currently expirimental and may be off in certain configurations. * * @var boolean */ var $arc_linethrough = true; /** * The colors or color of the arced lines.<br /> * Use HTML hex notation with preceding # sign, and separate each value with a comma.<br /> * This should be similar to your font color for single color images. * * @var string */ var $arc_line_colors = "#8080ff"; /** * Full path to the WAV files to use to make the audio files, include trailing /.<br /> * Name Files [A-Z0-9].wav * * @since 1.0.1 * @var string */ var $audio_path = './audio/'; //END USER CONFIGURATION //There should be no need to edit below unless you really know what you are doing. /** * The gd image resource. * * @access private * @var resource */ var $im; /** * The background image resource * * @access private * @var resource */ var $bgimg; /** * The code generated by the script * * @access private * @var string */ var $code; /** * The code that was entered by the user * * @access private * @var string */ var $code_entered; /** * Whether or not the correct code was entered * * @access private * @var boolean */ var $correct_code; /** * Class constructor.<br /> * Because the class uses sessions, this will attempt to start a session if there is no previous one.<br /> * If you do not start a session before calling the class, the constructor must be called before any * output is sent to the browser. * * <code> * $securimage = new Securimage(); * </code> * */ function Securimage() { $this->gd_font_file =EGW_SERVER_ROOT.'/etemplate/templates/default/gdfonts/automatic.gdf'; $this->audio_path=EGW_SERVER_ROOT.'/etemplate/templates/default/audio/'; $this->wordlist_file=EGW_SERVER_ROOT. '/etemplate/templates/default/words/words.txt'; if ( session_id() == '' ) { // no session has been started yet, which is needed for validation session_start(); } } /** * Generate a code and output the image to the browser. * * <code> * <?php * include 'securimage.php'; * $securimage = new Securimage(); * $securimage->show('bg.jpg'); * ?> * </code> * * @param string $background_image The path to an image to use as the background for the CAPTCHA */ function show($background_image = "") { if($background_image != "" && is_readable($background_image)) { $this->bgimg = $background_image; } $this->doImage(); } /** * Validate the code entered by the user. * * <code> * $code = $_POST['code']; * if ($securimage->check($code) == false) { * die("Sorry, the code entered did not match."); * } else { * $valid = true; * } * </code> * @param string $code The code the user entered * @return boolean true if the code was correct, false if not */ function check($code) { $this->code_entered = $code; $this->validate(); return $this->correct_code; } /** * Generate and output the image * * @access private * */ function doImage() { if($this->use_transparent_text == true || $this->bgimg != "") { $this->im = imagecreatetruecolor($this->image_width, $this->image_height); $bgcolor = imagecolorallocate($this->im, hexdec(substr($this->image_bg_color, 1, 2)), hexdec(substr($this->image_bg_color, 3, 2)), hexdec(substr($this->image_bg_color, 5, 2))); imagefilledrectangle($this->im, 0, 0, imagesx($this->im), imagesy($this->im), $bgcolor); } else { //no transparency $this->im = imagecreate($this->image_width, $this->image_height); $bgcolor = imagecolorallocate($this->im, hexdec(substr($this->image_bg_color, 1, 2)), hexdec(substr($this->image_bg_color, 3, 2)), hexdec(substr($this->image_bg_color, 5, 2))); } if($this->bgimg != "") { $this->setBackground(); } $this->createCode(); if (!$this->draw_lines_over_text && $this->draw_lines) $this->drawLines(); //print_r(get_defined_constants());die(); //print_r($this->code.'dddd');die(); $this->drawWord(); if ($this->arc_linethrough == true) $this->arcLines(); if ($this->draw_lines_over_text && $this->draw_lines) $this->drawLines(); $this->output(); } /** * Set the background of the CAPTCHA image * * @access private * */ function setBackground() { $dat = @getimagesize($this->bgimg); if($dat == false) { return; } switch($dat[2]) { case 1: $newim = @imagecreatefromgif($this->bgimg); break; case 2: $newim = @imagecreatefromjpeg($this->bgimg); break; case 3: $newim = @imagecreatefrompng($this->bgimg); break; case 15: $newim = @imagecreatefromwbmp($this->bgimg); break; case 16: $newim = @imagecreatefromxbm($this->bgimg); break; default: return; } if(!$newim) return; imagecopy($this->im, $newim, 0, 0, 0, 0, $this->image_width, $this->image_height); } /** * Draw arced lines over the text * * @access private * */ function arcLines() { $colors = explode(',', $this->arc_line_colors); imagesetthickness($this->im, 3); $color = $colors[rand(0, sizeof($colors) - 1)]; $linecolor = imagecolorallocate($this->im, hexdec(substr($color, 1, 2)), hexdec(substr($color, 3, 2)), hexdec(substr($color, 5, 2))); $xpos = $this->text_x_start + ($this->font_size * 2) + rand(-5, 5); $width = $this->image_width / 2.66 + rand(3, 10); $height = $this->font_size * 2.14 - rand(3, 10); if ( rand(0,100) % 2 == 0 ) { $start = rand(0,66); $ypos = $this->image_height / 2 - rand(5, 15); $xpos += rand(5, 15); } else { $start = rand(180, 246); $ypos = $this->image_height / 2 + rand(5, 15); } $end = $start + rand(75, 110); imagearc($this->im, $xpos, $ypos, $width, $height, $start, $end, $linecolor); $color = $colors[rand(0, sizeof($colors) - 1)]; $linecolor = imagecolorallocate($this->im, hexdec(substr($color, 1, 2)), hexdec(substr($color, 3, 2)), hexdec(substr($color, 5, 2))); if ( rand(1,75) % 2 == 0 ) { $start = rand(45, 111); $ypos = $this->image_height / 2 - rand(5, 15); $xpos += rand(5, 15); } else { $start = rand(200, 250); $ypos = $this->image_height / 2 + rand(5, 15); } $end = $start + rand(75, 100); imagearc($this->im, $this->image_width * .75, $ypos, $width, $height, $start, $end, $linecolor); } /** * Draw lines on the image * * @access private * */ function drawLines() { $linecolor = imagecolorallocate($this->im, hexdec(substr($this->line_color, 1, 2)), hexdec(substr($this->line_color, 3, 2)), hexdec(substr($this->line_color, 5, 2))); imagesetthickness($this->im, $this->line_thickness); //vertical lines for($x = 1; $x < $this->image_width; $x += $this->line_distance) { imageline($this->im, $x, 0, $x, $this->image_height, $linecolor); } //horizontal lines for($y = 11; $y < $this->image_height; $y += $this->line_distance) { imageline($this->im, 0, $y, $this->image_width, $y, $linecolor); } if ($this->draw_angled_lines == true) { for ($x = -($this->image_height); $x < $this->image_width; $x += $this->line_distance) { imageline($this->im, $x, 0, $x + $this->image_height, $this->image_height, $linecolor); } for ($x = $this->image_width + $this->image_height; $x > 0; $x -= $this->line_distance) { imageline($this->im, $x, 0, $x - $this->image_height, $this->image_height, $linecolor); } } } /** * Draw the CAPTCHA code over the image * * @access private * */ function drawWord() { if ($this->use_gd_font == true) { if (!is_int($this->gd_font_file)) { //is a file name $font = @imageloadfont($this->gd_font_file); if ($font == false) { trigger_error("Failed to load GD Font file {$this->gd_font_file} ", E_USER_WARNING); return; } } else { //gd font identifier $font = $this->gd_font_file; } $color = imagecolorallocate($this->im, hexdec(substr($this->text_color, 1, 2)), hexdec(substr($this->text_color, 3, 2)), hexdec(substr($this->text_color, 5, 2))); imagestring($this->im, $font, $this->text_x_start, ($this->image_height / 2) - ($this->gd_font_size / 2), $this->code, $color); } else { //ttf font if($this->use_transparent_text == true) { $alpha = intval($this->text_transparency_percentage / 100 * 127); $font_color = imagecolorallocatealpha($this->im, hexdec(substr($this->text_color, 1, 2)), hexdec(substr($this->text_color, 3, 2)), hexdec(substr($this->text_color, 5, 2)), $alpha); } else { //no transparency $font_color = imagecolorallocate($this->im, hexdec(substr($this->text_color, 1, 2)), hexdec(substr($this->text_color, 3, 2)), hexdec(substr($this->text_color, 5, 2))); } $x = $this->text_x_start; $strlen = strlen($this->code); $y_min = ($this->image_height / 2) + ($this->font_size / 2) - 2; $y_max = ($this->image_height / 2) + ($this->font_size / 2) + 2; $colors = explode(',', $this->multi_text_color); for($i = 0; $i < $strlen; ++$i) { $angle = rand($this->text_angle_minimum, $this->text_angle_maximum); $y = rand($y_min, $y_max); if ($this->use_multi_text == true) { $idx = rand(0, sizeof($colors) - 1); $r = substr($colors[$idx], 1, 2); $g = substr($colors[$idx], 3, 2); $b = substr($colors[$idx], 5, 2); if($this->use_transparent_text == true) { $font_color = imagecolorallocatealpha($this->im, "0x$r", "0x$g", "0x$b", $alpha); } else { $font_color = imagecolorallocate($this->im, "0x$r", "0x$g", "0x$b"); } } @imagettftext($this->im, $this->font_size, $angle, $x, $y, $font_color, $this->ttf_file, $this->code{$i}); $x += rand($this->text_minimum_distance, $this->text_maximum_distance); } //for loop } //else ttf font } //function /** * Create a code and save to the session * * @since 1.0.1 * */ function createCode() { $this->code = false; if ($this->use_wordlist && is_readable($this->wordlist_file)) { $this->code = $this->readCodeFromFile(); } if ($this->code == false) { $this->code = $this->generateCode($this->code_length); } $this->saveData(); } /** * Generate a code * * @access private * @param int $len The code length * @return string */ function generateCode($len) { $code = ''; for($i = 1, $cslen = strlen($this->charset); $i <= $len; ++$i) { $code .= strtoupper( $this->charset{rand(0, $cslen - 1)} ); } return $code; } /** * Reads a word list file to get a code * * @access private * @since 1.0.2 * @return mixed false on failure, a word on success */ function readCodeFromFile() { $fp = @fopen($this->wordlist_file, 'rb'); if (!$fp) return false; $fsize = filesize($this->wordlist_file); if ($fsize < 32) return false; // too small of a list to be effective if ($fsize < 128) { $max = $fsize; // still pretty small but changes the range of seeking } else { $max = 128; } fseek($fp, rand(0, $fsize - $max), SEEK_SET); $data = fread($fp, 128); // read a random 128 bytes from file fclose($fp); $data = preg_replace("/\r?\n/", "\n", $data); $start = strpos($data, "\n", rand(0, 100)) + 1; // random start position $end = strpos($data, "\n", $start); // find end of word return strtolower(substr($data, $start, $end - $start)); // return substring in 128 bytes } /** * Output image to the browser * * @access private * */ function output() { header("Expires: Sun, 1 Jan 2000 12:00:00 GMT"); header("Last-Modified: " . gmdate("D, d M Y H:i:s") . "GMT"); header("Cache-Control: no-store, no-cache, must-revalidate"); header("Cache-Control: post-check=0, pre-check=0", false); header("Pragma: no-cache"); switch($this->image_type) { case SI_IMAGE_JPEG: header("Content-Type: image/jpeg"); imagejpeg($this->im, null, 90); break; case SI_IMAGE_GIF: header("Content-Type: image/gif"); imagegif($this->im); break; default: header("Content-Type: image/png"); imagepng($this->im); break; } imagedestroy($this->im); } /** * Get WAV file data of the spoken code.<br /> * This is appropriate for output to the browser as audio/x-wav * * @since 1.0.1 * @return string WAV data * */ function getAudibleCode() { $letters = array(); $code = $this->getCode(); //print_r($code );die(); if ($code == '') { $this->createCode(); $code = $this->getCode(); } for($i = 0; $i < strlen($code); ++$i) { $letters[] = $code{$i}; } return $this->generateWAV($letters); } /** * Save the code in the session * * @access private * */ function saveData() { $_SESSION['securimage_code_value'] = strtolower($this->code); } /** * Validate the code to the user code * * @access private * */ function validate() { if ( isset($_SESSION['securimage_code_value']) && !empty($_SESSION['securimage_code_value']) ) { if ( $_SESSION['securimage_code_value'] == strtolower(trim($this->code_entered)) ) { $this->correct_code = true; $_SESSION['securimage_code_value'] = ''; } else { $this->correct_code = false; } } else { $this->correct_code = false; } } /** * Get the captcha code * * @since 1.0.1 * @return string */ function getCode() { if (isset($_SESSION['securimage_code_value']) && !empty($_SESSION['securimage_code_value'])) { return $_SESSION['securimage_code_value']; } else { return ''; } } /** * Check if the user entered code was correct * * @access private * @return boolean */ function checkCode() { return $this->correct_code; } /** * Generate a wav file by concatenating individual files * @since 1.0.1 * @access private * @param array $letters Array of letters to build a file from * @return string WAV file data */ function generateWAV($letters) { $fields = join('/',array( 'H8ChunkID', 'VChunkSize', 'H8Format', 'H8Subchunk1ID', 'VSubchunk1Size', 'vAudioFormat', 'vNumChannels', 'VSampleRate', 'VByteRate', 'vBlockAlign', 'vBitsPerSample' )); $data = ''; $count=0; foreach($letters as $letter){ //print($count); //if($count!=4){$count++;continue;} $fname=$this->audio_path . strtolower($letter) . '.wav'; $fp = fopen($fname,'rb'); $header = fread($fp,36); $info = unpack($fields,$header); //print_r($info); // read optional extra stuff if($info['Subchunk1Size'] > 16){ $header .= fread($fp,($info['Subchunk1Size']-16)); } // read SubChunk2ID $header .= fread($fp,4); // read Subchunk2Size $sizeArray = unpack('Vsize',fread($fp, 4)); $size += $sizeArray['size']; //print('print:'.$size.'<br>'); // read data $data .= fread($fp,$sizeArray['size']); //print($count); //print_r($size.'<br>'); fclose($fp); } return $header.pack('V',$size).$data;// } /* $first = true; // use first file to write the header... $data_len = 0; $files = array(); $out_data = ''; foreach ($letters as $letter) { $filename = $this->audio_path . strtoupper($letter) . '.wav'; //print($filename.'<br>'); $fp = fopen($filename, 'rb'); $file = array(); $data = fread($fp, filesize($filename)); // read file in //print($data.'<br>'); $header = substr($data, 0, 36); $body = substr($data, 44); $data = unpack('NChunkID/VChunkSize/NFormat/NSubChunk1ID/VSubChunk1Size/vAudioFormat/vNumChannels/VSampleRate/VByteRate/vBlockAlign/vBitsPerSample', $header); $file['sub_chunk1_id'] = $data['SubChunk1ID']; $file['bits_per_sample'] = $data['BitsPerSample']; $file['channels'] = $data['NumChannels']; $file['format'] = $data['AudioFormat']; $file['sample_rate'] = $data['SampleRate']; $file['size'] = $data['ChunkSize'] + 8; $file['data'] = $body; // if ( ($p = strpos($file['data'], 'LIST')) !== false) { // // If the LIST data is not at the end of the file, this will probably break your sound file // $info = substr($file['data'], $p + 4, 8); // $data = unpack('Vlength/Vjunk', $info); // $file['data'] = substr($file['data'], 0, $p); // $file['size'] = $file['size'] - (strlen($file['data']) - $p); // } $files[] = $file; $data = null; $header = null; $body = null; $data_len += strlen($file['data']); fclose($fp); } $data_len += strlen($file['data']); $data_len += strlen($file['data']); //print_r($files); $out_data = ''; for($i = 0; $i < sizeof($files); ++$i) { if ($i == 0) { // output header $out_data .= pack('C4VC8', ord('R'), ord('I'), ord('F'), ord('F'), $data_len + 36, ord('W'), ord('A'), ord('V'), ord('E'), ord('f'), ord('m'), ord('t'), ord(' ')); $out_data .= pack('VvvVVvv', 16, $files[$i]['format'], $files[$i]['channels'], $files[$i]['sample_rate'], $files[$i]['sample_rate'] * (($files[$i]['bits_per_sample'] * $files[$i]['channels']) / 8), ($files[$i]['bits_per_sample'] * $files[$i]['channels']) / 8, $files[$i]['bits_per_sample'] ); $out_data .= pack('C4', ord('d'), ord('a'), ord('t'), ord('a')); $out_data .= pack('V', $data_len); } $out_data .= $files[$i]['data']; } //print_r($out_data);die(); return $out_data; }*/ } /* class Securimage */