<?php



/*

--------------------

Что то типа капчи, учимся:)

--------------------

*/



$captha_length = 5;

$captcha_random_seed = "152639487";



IF (ISSET($_REQUEST['image'])) {



FUNCTION write_image_number($num_c) {



$number_c = "R0lGODlhCgAMAIABAFNTU////yH5BAEAAAEALAAAAAAKAAwAAAI";



IF ($num_c == "0") { $len_c = "63"; $number_c.="WjIFgi6e+QpMP0jin1bfv2nFaBlJaAQA7";}

IF ($num_c == "1") { $len_c = "61"; $number_c.="UjA1wG8noXlJsUnlrXhE/+DXb0RUAOw==";}

IF ($num_c == "2") { $len_c = "64"; $number_c.="XjIFgi6e+QpMPRlbjvFtnfFnchyVJUAAAOw==";}

IF ($num_c == "3") { $len_c = "64"; $number_c.="XjIFgi6e+Qovs0RkTzXbj+3yTJnUlVgAAOw==";}

IF ($num_c == "4") { $len_c = "64"; $number_c.="XjA9wG8mWFIty0amczbVJDVHg9oSlZxQAOw==";}

IF ($num_c == "5") { $len_c = "63"; $number_c.="WTIAJdsuPHovSKGoprhs67mzaJypMAQA7";}

IF ($num_c == "6") { $len_c = "63"; $number_c.="WjIFoB6vxmFw0pfpihI3jOW1at3FRAQA7";}

IF ($num_c == "7") { $len_c = "61"; $number_c.="UDI4Xy6vtAIzTyPpg1ndu9oEdNxUAOw==";}

IF ($num_c == "8") { $len_c = "63"; $number_c.="WjIFgi6e+QpMP2slSpJbn7mFeWDlYAQA7";}

IF ($num_c == "9") { $len_c = "64"; $number_c.="XjIFgi6e+QpMP0jinvbT2FGGPxmlkohUAOw==";}



HEADER("Content-type: image/gif");

HEADER("Content-length: $len_c");



ECHO BASE64_DECODE($number_c);



}



// Вывод закодированных изображений на экран

IF (ARRAY_KEY_EXISTS('image', $_REQUEST)) {



$num_c = $_REQUEST['image'];



FOR ($i = 0; $i < 10; $i++) {



IF (MD5($i + $captcha_random_seed) == $num_c) {



write_image_number($i);

EXIT;



}



}



}



EXIT;



}



$captcha_key = '';



/*

--------------------

Функция вывода капчи

--------------------

*/



FUNCTION CAPTCHA($title, $class) {



//$title - заголовок капчи

//$class - стиль поля ввода чисел с картинки



GLOBAL $captha_length, $captcha_random_seed, $captcha_key;



ECHO "<b>".LG($title).":</b> ";

ECHO "<span class='captcha'>";



FOR ($i = 0; $i < $captha_length; $i++) {



$snum = MT_RAND(0,9);

$psnum = MD5($snum + $captcha_random_seed);



ECHO '<img src="'.PHP_SELF.'?image='.$psnum.'">';



$captcha_key .= $snum;



}



ECHO "</span><br /><br />";



$captcha_key = MD5($captcha_key + $captcha_random_seed);



ECHO "<input name='captcha_key' type='hidden' value='$captcha_key'>";

ECHO "<input placeholder='".LG('Числа')."' name='captcha' class='".$class."' type='text' maxlength='$captha_length' size='$captha_length'><br /><br />";



}



?>