diff options
Diffstat (limited to 'src/captcha.php')
| -rw-r--r-- | src/captcha.php | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/src/captcha.php b/src/captcha.php deleted file mode 100644 index d6d2547..0000000 --- a/src/captcha.php +++ /dev/null @@ -1,151 +0,0 @@ -<?php -function generate_image_captcha(int $width, int $height, int $difficulty, string $file_name, string $file_folder): string -{ - $image = imagecreatetruecolor($width, $height); - - $background = imagecolorallocate($image, 0xDD, 0xDD, 0xDD); - imagefilledrectangle($image, 0, 0, $width, $height, $background); - - $files = scandir($file_folder); - array_splice($files, 0, 2); - - for ($i = 0; $i < 50 * $difficulty; $i++) { - $unprocessed = imagecreatefrompng("$file_folder/" . $files[random_int(0, count($files) - 1)]); - - $oldw = imagesx($unprocessed); - $oldh = imagesy($unprocessed); - - $w = random_int(round($oldw / 4), round($oldw / 2)); - $h = random_int(round($oldh / 4), round($oldh / 2)); - - $file = imagecreatetruecolor($w, $h); - imagealphablending($file, false); - $transparent = imagecolorallocatealpha($file, 0, 0, 0, 127); - imagefill($file, 0, 0, $transparent); - imagesavealpha($file, true); - - imagecopyresampled($file, $unprocessed, 0, 0, 0, 0, $w, $h, $oldw, $oldh); - - $angle = random_int(0, 360); - - $file = imagerotate($file, $angle, $transparent); - - for ($j = 0; $j < random_int(2, 5 * $difficulty); $j++) { - imagefilter($file, IMG_FILTER_GAUSSIAN_BLUR); - } - - if (random_int(0, 15) % 3 == 0) { - imagefilter($file, IMG_FILTER_NEGATE); - } - - if (random_int(0, 20) % 4 == 0) { - imagefilter($file, IMG_FILTER_PIXELATE, 4); - } - - $w = imagesx($file); - $h = imagesy($file); - - imagecopy( - $image, - $file, - random_int(0, $width - $w), - random_int(0, $height - $h), - 0, - 0, - $w, - $h - ); - } - - $foreground = imagecreatefrompng("$file_folder/$file_name.png"); - $transparent = imagecolorallocatealpha($foreground, 0, 0, 0, 127); - $angle = random_int(0, max: 180); - $foreground = imagerotate($foreground, $angle, $transparent); - $w = imagesx($foreground); - $h = imagesy($foreground); - imagecopy( - $image, - $foreground, - random_int(0, $width - $w), - random_int(0, $height - $h), - 0, - 0, - $w, - $h - ); - - ob_start(); - imagepng($image); - $source = ob_get_contents(); - ob_clean(); - - return "data:image/png;base64," . base64_encode($source); -} - -function html_captcha_form() -{ - echo '' ?> - <div class="box" id="form-captcha-wrapper" style="display: none;"> - <div class="box navtab"> - Solve captcha - </div> - <div class="box content"> - <noscript>JavaScript is required for captcha!</noscript> - <form id="form-captcha"> - <img src="" alt="Generating captcha..." id="form-captcha-img" width="256"> - <div class="column small-gap"> - <div class="row small-gap"> - <input type="text" name="answer" placeholder="Enter emote name..." class="grow" - id="form-captcha-answer"> - <button type="submit" class="green" id="form-captcha-solve">Solve</button> - </div> - </div> - </form> - </div> - </div> - <script> - const formElement = document.getElementById("form-captcha"); - const formWrapper = document.getElementById("form-captcha-wrapper"); - - function get_captcha() { - fetch("/captcha.php") - .then((response) => response.json()) - .then((json) => { - if (json.data == null) { - formWrapper.style.display = "none"; - return; - } - - document.getElementById("form-captcha-answer").value = null; - - formWrapper.style.display = "flex"; - - document.getElementById("form-captcha-img").setAttribute("src", json.data); - }); - } - - get_captcha(); - - formElement.addEventListener("submit", (e) => { - e.preventDefault(); - - const answer = document.getElementById("form-captcha-answer"); - const body = new FormData(formElement); - - fetch("/captcha.php", { - "method": "POST", - "body": body - }) - .then((response) => response.json()) - .then((json) => { - if (json.status_code == 200 && json.data == null) { - formWrapper.style.display = "none"; - return; - } - - get_captcha(); - }); - }); - </script> - <?php ; -}
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