CaptchaController.php
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<?php
// +----------------------------------------------------------------------
// | ThinkCMF [ WE CAN DO IT MORE SIMPLE ]
// +----------------------------------------------------------------------
// | Copyright (c) 2013-2019 http://www.thinkcmf.com All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +---------------------------------------------------------------------
// | Author: Dean <zxxjjforever@163.com>
// +----------------------------------------------------------------------
namespace cmf\controller;
use think\captcha\Captcha;
use think\Request;
class CaptchaController
{
/**
* captcha/new?height=50&width=200&font_size=25&length=4&bg=243,251,254&id=1
* @param Request $request
* @return \think\Response
*/
public function index(Request $request)
{
$config = [
// 验证码字体大小(px)
'fontSize' => 25,
// 验证码字体大小(px)
'useCurve' => true,
// 是否画混淆曲线
'useNoise' => true,
// 验证码图片高度
'imageH' => 38,
// 验证码图片宽度
'imageW' => 120,
// 验证码位数
'length' => 4,
// 背景颜色
'bg' => [255, 255, 255],
];
$fontSize = $request->param('font_size', 25, 'intval');
if ($fontSize > 8 && $fontSize < 100) {
$config['fontSize'] = $fontSize;
}
$imageH = $request->param('height', '');
if ($imageH != '' && $imageH < 100) {
$config['imageH'] = intval($imageH);
}
$imageW = $request->param('width', '');
if ($imageW != '' && $imageW < 200 ) {
$config['imageW'] = intval($imageW);
}
$length = $request->param('length', 4, 'intval');
if ($length > 2 && $length <= 100) {
$config['length'] = $length;
}
$bg = $request->param('bg', '');
if (!empty($bg)) {
$bg = explode(',', $bg);
array_walk($bg, 'intval');
if (count($bg) > 2 && $bg[0] < 256 && $bg[1] < 256 && $bg[2] < 256) {
$config['bg'] = $bg;
}
}
$id = $request->param('id', 0, 'intval');
if ($id > 5 || empty($id)) {
$id = '';
$config['captcha_id'] = $id;
}
$response = hook_one('captcha_image', $config);
if (empty($response)) {
$defaultCaptchaConfig = config('captcha');
if ($defaultCaptchaConfig && is_array($defaultCaptchaConfig)) {
$config = array_merge($config, $defaultCaptchaConfig);
}
$captcha = new Captcha($config);
$response = $captcha->entry($id);
}
@ob_clean();// 清除输出缓存
return $response;
}
}