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<?php
define('CSS_CAPTCHA_DEFAULT_ALLOWED_CHARACTERS', 'aAbBcCdDeEfFgGhHijkKLmMnNpPqQrRsStTuUvVwWxXyYzZ123456789');
require_once drupal_get_path('module', 'css_captcha') . '/../text_captcha/text_captcha.inc';
function css_captcha_help($path, $arg) {
switch ($path) {
case 'admin/user/captcha/css_captcha':
return '<p>' . t('The CSS CAPTCHA uses CSS tricks to obfuscate a random text code for spam bots. The characters of the code are scrambled in the HTML markup but are displayed in the correct order when rendered with a CSS capable browser.') . '</p>';
}
}
function css_captcha_menu() {
$items = array();
$items['admin/config/people/captcha/css_captcha'] = array(
'title' => 'CSS CAPTCHA',
'file' => 'css_captcha.admin.inc',
'page callback' => 'drupal_get_form',
'page arguments' => array(
'css_captcha_settings_form',
),
'access arguments' => array(
'administer CAPTCHA settings',
),
'type' => MENU_LOCAL_TASK,
);
return $items;
}
function css_captcha_captcha($op, $captcha_type = '') {
switch ($op) {
case 'list':
return array(
"CSS CAPTCHA",
);
case 'generate':
if ($captcha_type == "CSS CAPTCHA") {
$allowed_chars = _text_captcha_utf8_split(variable_get('css_captcha_allowed_characters', CSS_CAPTCHA_DEFAULT_ALLOWED_CHARACTERS));
$code_length = variable_get('css_captcha_code_length', 6);
$solution = '';
$code_struct = array();
for ($i = 0; $i < $code_length; $i++) {
$character = $allowed_chars[array_rand($allowed_chars)];
$code_struct[$i] = array(
'content' => $character,
'size' => 1.25,
);
$solution .= $character;
}
while (count($code_struct) > 1) {
$i = mt_rand(0, count($code_struct) - 2);
$item_left = $code_struct[$i];
$item_right = $code_struct[$i + 1];
$merged_size = $item_left['size'] + $item_right['size'] + 0.25;
if (mt_rand(0, 1)) {
$merged_content = "<div style=\"width:{$item_left['size']}em;float:left;\">{$item_left['content']}</div>" . "<div style=\"width:{$item_right['size']}em;float:left;\">{$item_right['content']}</div>";
}
else {
$merged_content = "<div style=\"width:{$item_right['size']}em;float:right;\">{$item_right['content']}</div>" . "<div style=\"width:{$item_left['size']}em;float:left;\">{$item_left['content']}</div>";
}
$item_merged = array(
'content' => '<div style="width: ' . $merged_size . 'em;height:1.5em;">' . $merged_content . '</div>',
'size' => $merged_size,
);
array_splice($code_struct, $i, 2, array(
$item_merged,
));
$code_struct = array_values($code_struct);
}
$captcha = array();
$captcha['solution'] = $solution;
$captcha['form']['captcha_response'] = array(
'#type' => 'textfield',
'#title' => t('Enter the code above'),
'#size' => 10,
'#prefix' => '<div class="css-captcha-code">' . $code_struct[0]['content'] . '</div>',
'#maxlength' => 10,
'#required' => TRUE,
'#description' => t('Enter the code without spaces.'),
);
return $captcha;
}
break;
}
}