first commit

web/captcha.php

@@ -0,0 +1,61 @@
+<?php
+
+if (empty($_GET['id'])) {
+    exit;
+}
+
+$charHeight = 20;
+$font = 5;
+$lines = 2;
+$dots = 200;
+
+if (!empty($cfg['captcha']['difficulty'])) {
+    $lines *= $cfg['captcha']['difficulty'];
+    $dots *= $cfg['captcha']['difficulty'];
+}
+
+if (!empty($cfg['captcha']['size'])) {
+    $charHeight = intval($cfg['captcha']['size']);
+    $font = $charHeight / 2.5;
+}
+
+$charWidth = $charHeight;
+
+$code = $_GET['id'];
+$hash = generateCaptcha($code);
+$length = strlen($hash);
+
+header('Content-type: image/png');
+
+$width = $length * $charWidth;
+$height = $charHeight;
+
+$image = imagecreate($width, $charHeight);
+
+$colorBg = imagecolorallocate($image, 255, 255, 255);
+
+// Text
+foreach (str_split($hash) as $index => $char) {
+    $color = imagecolorallocate($image, rand(0, 30), rand(10, 20), rand(0, 255));
+
+    if ($font > 5) {
+        imagettftext($image, $font, rand(-30, 30), ($index + 0.2) * $charWidth + rand(-4, 5), $charHeight * 0.7 + rand(-6, 2), $color, realpath('./static/fonts/arialbd.ttf'), $char);
+    } else {
+        imagechar($image, $font, ($index + 0.2) * $charWidth + rand(-4, 5), $charHeight * 0.2 + rand(-6, 2), $char, $color);
+    }
+}
+
+// Lines
+$line_color = imagecolorallocate($image, 0, 200 + rand() % 50, 0);
+for ($i = 0; $i < $lines; $i++) {
+    imageline($image, rand() % $width / 2, rand() % $height, rand() % $width / 2 + $width / 2, rand() % $height, $line_color);
+}
+
+// Dots
+$pixel_color = imagecolorallocate($image, 255, 0, 0);
+for ($i = 0; $i < $dots; $i++) {
+    imagesetpixel($image, rand() % $width, rand() % $height, $pixel_color);
+}
+
+imagepng($image);
+imagedestroy($image);