Files
firstgarden-web-gnu/plugin/captcha/captcha.lib.php
2013-01-10 17:23:11 +09:00

179 lines
5.8 KiB
PHP

<?php
include_once("./_common.php");
class captcha
{
// 이미지크기 폭
var $width = 80;
// 이미지크기 높이
var $height = 25;
// 폰트 사이즈
var $size = 16;
// 폰트 기울기
var $angle = 0;
// 폰트 왼쪽 위치
var $x = 5;
// 폰트 위쪽 위치
var $y = 21;
// 캡챠이미지 배경색상 rgb
var $back = array('r'=>255, 'g'=>255, 'b'=>255);
// 글자색상 rgb
var $text = array('r'=>0, 'g'=>0, 'b'=>0);
// 그림자 글자색상 rgb
var $shadow = array('r'=>128, 'g'=>128, 'b'=>128);
var $captcha_length = 5;
// 이미지 크기
function set_box_size($width, $height) {
$this->width = $width;
$this->height = $height;
}
// 폰트 사이즈
function set_size($size) {
$this->size = $size;
}
// 폰트 기울기
function set_angle($angle) {
$this->angle = $angle;
}
// 폰트 위치
function set_position($x, $y) {
$this->x = $x;
$this->y = $y;
}
function set_captcha_length($length)
{
$this->captcha_length = $length;
}
function set_back_color($r, $g, $b) {
$this->back['r'] = $r;
$this->back['g'] = $g;
$this->back['b'] = $b;
}
function set_text_color($r, $g, $b) {
$this->text['r'] = $r;
$this->text['g'] = $g;
$this->text['b'] = $b;
}
function set_shadow_color($r, $g, $b) {
$this->shadow['r'] = $r;
$this->shadow['g'] = $g;
$this->shadow['b'] = $b;
}
function get_captcha_key()
{
$from = (int)('1'.str_repeat('0', $this->captcha_length - 1));
$to = (int)(str_repeat('9', $this->captcha_length));
return mt_rand($from, $to);
}
function run() {
// The text to draw
$captcha_key = $this->get_captcha_key();
set_session('ss_captcha_key', $captcha_key);
set_session('ss_captcha_cnt', 0);
// Set the content-type
header('Content-Type: image/gif');
// Create the image
$im = imagecreatetruecolor($this->width, $this->height);
// Create some colors
$white = imagecolorallocate($im, $this->back['r'], $this->back['g'], $this->back['b']);
$grey = imagecolorallocate($im, $this->shadow['r'], $this->shadow['g'], $this->shadow['b']);
$black = imagecolorallocate($im, $this->text['r'], $this->text['g'], $this->text['b']);
imagefilledrectangle($im, 0, 0, $this->width, $this->height, $white);
// Replace path by your own font path
$fonts = Array();
foreach (glob('fonts/*.ttf') as $filename) {
$fonts[] = $filename;
}
$font = $fonts[mt_rand(0, count($fonts)-1)];
$size = $this->size;
$angle = $this->angle;
$x = $this->x;
$y = $this->y;
// Add some shadow to the text
imagettftext($im, $size, $angle, $x, $y, $grey, $font, $captcha_key);
// Add the text
imagettftext($im, $size, $angle, $x-1, $y-1, $black, $font, $captcha_key);
if (mt_rand(0,1)) {
imagettftext($im, $size, $angle, $x-2, $y-2, $white, $font, $captcha_key);
} else if (mt_rand(0,1)) {
imagettftext($im, $size, $angle, $x-2, $y-2, $grey, $font, $captcha_key);
}
// Using imagepng() results in clearer text compared with imagejpeg()
imagegif($im);
imagedestroy($im);
}
}
/*
사용법 :
$captcha = new captcha();
$captcha->set_captcha_length(mt_rand(4, 6));
$captcha->set_position(mt_rand(0, 10), mt_rand(15, 20));
$captcha->set_angle(mt_rand(-3, 3));
$captcha->set_size(mt_rand(15, 16));
$captcha->set_back_color(mt_rand(200,255), mt_rand(200,255), mt_rand(200,255));
$captcha->set_text_color(mt_rand(0,100), mt_rand(0,100), mt_rand(0,100));
$captcha->set_shadow_color(mt_rand(100,200), mt_rand(100,200), mt_rand(100,200));
$captcha->run();
*/
// 캡챠이미지는 한개만 사용 가능함.
function captcha_html($input_name, $captcha_id_suffix='')
{
global $g4;
// 세션생성을 한후 다음페이지에서 해당 세션이 있을때만 올바른 캡챠코드인지 비교합니다.
set_session('ss_captcha_use', true);
$html = '<fieldset id="captcha'.$captcha_id_suffix.'" class="captcha">';
$html .= '<legend class="sound_only">자동등록방지</legend>';
//$html .= '<img src="" id="captcha" alt="자동등록방지 이미지" title="이미지를 클릭하시면 숫자가 바뀝니다.">';
$html .= '<iframe id="captcha_iframe" name="captcha_iframe" src="'.$g4['path'].'/plugin/captcha/run.php" title="자동등록방지숫자"></iframe>';
$html .= '<a href="'.$g4['path'].'/plugin/captcha/run.php" target="captcha_iframe">새로고침</a>';
$html .= '<a href="'.$g4['path'].'/plugin/captcha/wav.php" id="captcha_wav">음성듣기</a>';
$html .= '<label for="captcha_key">자동등록방지 입력</label>';
$html .= '<input type="text" id="captcha_key" name="'.$input_name.'" class="captcha_box fieldset_input" size="10" maxlength="5" required title="자동등록방지 입력">';
$html .= '<p class="sound_only">이미지의 숫자를 순서대로 입력하세요. 새로고침을 클릭하시면 새로운 숫자가 나타납니다.</p>';
$html .= '</fieldset>';
return $html;
}
function chk_captcha($input_name)
{
if (get_session('ss_captcha_use')) {
$key = get_session('ss_captcha_key');
if (!($key && $key == $_POST[$input_name])) {
set_session('ss_captcha_key', '');
return false;
}
}
return true;
}
// captcha javascript code
function captcha_js($element)
{
return "if (!check_captcha({$element})) { return false; }";
}
?>