mirror of
https://github.com/Neetpone/ponepaste.git
synced 2025-03-12 06:30:07 +01:00
66 lines
2.4 KiB
PHP
66 lines
2.4 KiB
PHP
<?php
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/** @noinspection PhpDefineCanBeReplacedWithConstInspection */
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define('IN_PONEPASTE', 1);
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require_once(__DIR__ . '/../includes/common.php');
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require_once(__DIR__ . '/../includes/captcha.php');
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if (empty($_GET['t'])) {
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die('No token provided.');
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}
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$captcha_token = 'captcha/' . md5($_GET['t']);
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$captcha_code = $redis->get($captcha_token);
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if (!$captcha_code) {
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die('No token provided.');
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}
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$captcha_config = captcha($captcha_config['colour'], $captcha_config['multiple'], $captcha_config['allowed']);
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// Pick random background, get info, and start captcha
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$background = $captcha_config['backgrounds'][rand(0, count($captcha_config['backgrounds']) - 1)];
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list($bg_width, $bg_height, $bg_type, $bg_attr) = getimagesize($background);
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$captcha = imagecreatefrompng($background);
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$color = hex2rgb($captcha_config['color']);
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$color = imagecolorallocate($captcha, $color['r'], $color['g'], $color['b']);
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// Determine text angle
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$angle = rand($captcha_config['angle_min'], $captcha_config['angle_max']) * (rand(0, 1) == 1 ? -1 : 1);
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// Select font randomly
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$font = $captcha_config['fonts'][rand(0, count($captcha_config['fonts']) - 1)];
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// Verify font file exists
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if (!file_exists($font)) {
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die('Font file not found.');
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}
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// Set the font size
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$font_size = rand($captcha_config['min_font_size'], $captcha_config['max_font_size']);
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$text_box_size = imagettfbbox($font_size, $angle, $font, $captcha_code);
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// Determine text position
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$box_width = (int) abs($text_box_size[6] - $text_box_size[2]);
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$box_height = (int) abs($text_box_size[5] - $text_box_size[1]);
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$text_pos_x_min = 0;
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$text_pos_x_max = (int) ($bg_width - $box_width);
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$text_pos_x = rand($text_pos_x_min, $text_pos_x_max);
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$text_pos_y_min = $box_height;
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$text_pos_y_max = (int) ($bg_height - ($box_height / 2));
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$text_pos_y = rand($text_pos_y_min, $text_pos_y_max);
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// Draw shadow
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if ($captcha_config['shadow']) {
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$shadow_color = hex2rgb($captcha_config['shadow_color']);
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$shadow_color = imagecolorallocate($captcha, $shadow_color['r'], $shadow_color['g'], $shadow_color['b']);
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imagettftext($captcha, $font_size, $angle, $text_pos_x + $captcha_config['shadow_offset_x'], $text_pos_y + $captcha_config['shadow_offset_y'], $shadow_color, $font, $captcha_code);
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}
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// Draw text
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imagettftext($captcha, $font_size, $angle, $text_pos_x, $text_pos_y, $color, $font, $captcha_code);
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// Output image
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header("Content-type: image/png");
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imagepng($captcha);
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