Current Path : /var/www/html/clients/kampol.e-nk.ru/modules/mod_simpleform2/kcaptcha/ |
Current File : /var/www/html/clients/kampol.e-nk.ru/modules/mod_simpleform2/kcaptcha/kcaptcha.php |
<?php /** * SimpleForm2 * * @version 1.0.5 * @package SimpleForm2 * @author ZyX (allforjoomla.ru) * @copyright (C) 2010 by ZyX (http://www.allforjoomla.ru) * @license GNU/GPL: http://www.gnu.org/copyleft/gpl.html * * If you fork this to create your own project, * please make a reference to allforjoomla.ru someplace in your code * and provide a link to http://www.allforjoomla.ru **/ class simpleCAPTCHA{ function simpleCAPTCHA($_width=200,$_height=60,$color=null,$background=null){ require(dirname(__FILE__).'/kcaptcha_config.php'); if((int)$_width>=100) $width = $_width; if((int)$_height>=50) $height = $_height; if($color) $foreground_color = $this->hex2rgb($color); if($background) $background_color = $this->hex2rgb($background); $fonts=array(); $fontsdir_absolute=dirname(__FILE__).'/'.$fontsdir; if ($handle = opendir($fontsdir_absolute)) { while (false !== ($file = readdir($handle))) { if (preg_match('/\.png$/i', $file)) { $fonts[]=$fontsdir_absolute.'/'.$file; } } closedir($handle); } $alphabet_length=strlen($alphabet); while(true){ // generating random keystring while(true){ $this->keystring=''; for($i=0;$i<$length;$i++){ $this->keystring.=$allowed_symbols{mt_rand(0,strlen($allowed_symbols)-1)}; } if(!preg_match('/cp|cb|ck|c6|c9|rn|rm|mm|co|do|cl|db|qp|qb|dp/', $this->keystring)) break; } $font_file=$fonts[mt_rand(0, count($fonts)-1)]; $font=imagecreatefrompng($font_file); imagealphablending($font, true); $fontfile_width=imagesx($font); $fontfile_height=imagesy($font)-1; $font_metrics=array(); $symbol=0; $reading_symbol=false; // loading font for($i=0;$i<$fontfile_width && $symbol<$alphabet_length;$i++){ $transparent = (imagecolorat($font, $i, 0) >> 24) == 127; if(!$reading_symbol && !$transparent){ $font_metrics[$alphabet{$symbol}]=array('start'=>$i); $reading_symbol=true; continue; } if($reading_symbol && $transparent){ $font_metrics[$alphabet{$symbol}]['end']=$i; $reading_symbol=false; $symbol++; continue; } } $img=imagecreatetruecolor($width, $height); imagealphablending($img, true); $white=imagecolorallocate($img, 255, 255, 255); $black=imagecolorallocate($img, 0, 0, 0); imagefilledrectangle($img, 0, 0, $width-1, $height-1, $white); // draw text $x=1; for($i=0;$i<$length;$i++){ $m=$font_metrics[$this->keystring{$i}]; $y=mt_rand(-$fluctuation_amplitude, $fluctuation_amplitude)+($height-$fontfile_height)/2+2; if($no_spaces){ $shift=0; if($i>0){ $shift=1000; for($sy=7;$sy<$fontfile_height-20;$sy+=1){ //for($sx=$m['start']-1;$sx<$m['end'];$sx+=1){ for($sx=$m['start']-1;$sx<$m['end'];$sx+=1){ $rgb=imagecolorat($font, $sx, $sy); $opacity=$rgb>>24; if($opacity<127){ $left=$sx-$m['start']+$x; $py=$sy+$y; if($py>$height) break; for($px=min($left,$width-1);$px>$left-12 && $px>=0;$px-=1){ $color=imagecolorat($img, $px, $py) & 0xff; if($color+$opacity<190){ if($shift>$left-$px){ $shift=$left-$px; } break; } } break; } } } if($shift==1000){ $shift=mt_rand(4,6); } } }else{ $shift=1; } imagecopy($img,$font,$x-$shift,$y,$m['start'],1,$m['end']-$m['start'],$fontfile_height); $x+=$m['end']-$m['start']-$shift; } if($x<$width-10) break; // fit in canvas } $center=$x/2; // credits. To remove, see configuration file $img2=imagecreatetruecolor($width, $height+($show_credits?12:0)); $foreground=imagecolorallocate($img2, $foreground_color[0], $foreground_color[1], $foreground_color[2]); $background=imagecolorallocate($img2, $background_color[0], $background_color[1], $background_color[2]); imagefilledrectangle($img2, 0, $height, $width-1, $height+12, $foreground); $credits=empty($credits)?$_SERVER['HTTP_HOST']:$credits; imagestring($img2, 2, $width/2-ImageFontWidth(2)*strlen($credits)/2, $height-2, $credits, $background); // periods $rand1=mt_rand(750000,1200000)/10000000; $rand2=mt_rand(750000,1200000)/10000000; $rand3=mt_rand(750000,1200000)/10000000; $rand4=mt_rand(750000,1200000)/10000000; // phases $rand5=mt_rand(0,3141592)/500000; $rand6=mt_rand(0,3141592)/500000; $rand7=mt_rand(0,3141592)/500000; $rand8=mt_rand(0,3141592)/500000; // amplitudes $rand9=mt_rand(330,420)/110; $rand10=mt_rand(330,450)/110; //wave distortion for($x=0;$x<$width;$x++){ for($y=0;$y<$height;$y++){ $sx=$x+(sin($x*$rand1+$rand5)+sin($y*$rand3+$rand6))*$rand9-$width/2+$center+1; $sy=$y+(sin($x*$rand2+$rand7)+sin($y*$rand4+$rand8))*$rand10; if($sx<0 || $sy<0 || $sx>=$width-1 || $sy>=$height-1){ $color=255; $color_x=255; $color_y=255; $color_xy=255; }else{ $color=imagecolorat($img, $sx, $sy) & 0xFF; $color_x=imagecolorat($img, $sx+1, $sy) & 0xFF; $color_y=imagecolorat($img, $sx, $sy+1) & 0xFF; $color_xy=imagecolorat($img, $sx+1, $sy+1) & 0xFF; } if($color==0 && $color_x==0 && $color_y==0 && $color_xy==0){ $newred=$foreground_color[0]; $newgreen=$foreground_color[1]; $newblue=$foreground_color[2]; }else if($color==255 && $color_x==255 && $color_y==255 && $color_xy==255){ $newred=$background_color[0]; $newgreen=$background_color[1]; $newblue=$background_color[2]; }else{ $frsx=$sx-floor($sx); $frsy=$sy-floor($sy); $frsx1=1-$frsx; $frsy1=1-$frsy; $newcolor=( $color*$frsx1*$frsy1+ $color_x*$frsx*$frsy1+ $color_y*$frsx1*$frsy+ $color_xy*$frsx*$frsy); if($newcolor>255) $newcolor=255; $newcolor=$newcolor/255; $newcolor0=1-$newcolor; $newred=$newcolor0*$foreground_color[0]+$newcolor*$background_color[0]; $newgreen=$newcolor0*$foreground_color[1]+$newcolor*$background_color[1]; $newblue=$newcolor0*$foreground_color[2]+$newcolor*$background_color[2]; } imagesetpixel($img2, $x, $y, imagecolorallocate($img2, $newred, $newgreen, $newblue)); } } if(function_exists("imagejpeg")){ header("Content-Type: image/jpeg"); imagejpeg($img2, null, $jpeg_quality); }else if(function_exists("imagegif")){ header("Content-Type: image/gif"); imagegif($img2); }else if(function_exists("imagepng")){ header("Content-Type: image/x-png"); imagepng($img2); } } function hex2rgb($hex){ $hex = str_replace('#','',$hex); $hex = strtoupper($hex); $decs = array( 'A' => 10, 'B' => 11, 'C' => 12, 'D' => 13, 'E' => 14, 'F' => 15 ); $a = (is_numeric($hex{0})?(int)$hex{0}:$decs[$hex{0}]); $b = (is_numeric($hex{1})?(int)$hex{1}:$decs[$hex{1}]); $c = (is_numeric($hex{2})?(int)$hex{2}:$decs[$hex{2}]); $d = (is_numeric($hex{3})?(int)$hex{3}:$decs[$hex{3}]); $e = (is_numeric($hex{4})?(int)$hex{4}:$decs[$hex{4}]); $f = (is_numeric($hex{5})?(int)$hex{5}:$decs[$hex{5}]); $R = ($a * 16) + $b; $G = ($c * 16) + $d; $B = ($e * 16) + $f; return array($R,$G,$B); } // returns keystring function getKeyString(){ return $this->keystring; } }