mirror of
https://gitee.com/zoujingli/ThinkAdmin.git
synced 2026-06-08 21:08:09 +08:00
261 lines
9.7 KiB
PHP
261 lines
9.7 KiB
PHP
<?php
|
||
|
||
// +----------------------------------------------------------------------
|
||
// | Library for ThinkAdmin
|
||
// +----------------------------------------------------------------------
|
||
// | 版权所有 2014~2024 ThinkAdmin [ thinkadmin.top ]
|
||
// +----------------------------------------------------------------------
|
||
// | 官方网站: https://thinkadmin.top
|
||
// +----------------------------------------------------------------------
|
||
// | 开源协议 ( https://mit-license.org )
|
||
// | 免费声明 ( https://thinkadmin.top/disclaimer )
|
||
// +----------------------------------------------------------------------
|
||
// | gitee 仓库地址 ：https://gitee.com/zoujingli/ThinkLibrary
|
||
// | github 仓库地址 ：https://github.com/zoujingli/ThinkLibrary
|
||
// +----------------------------------------------------------------------
|
||
|
||
declare (strict_types=1);
|
||
|
||
namespace think\admin\extend;
|
||
|
||
use think\admin\Library;
|
||
use think\admin\Storage;
|
||
use think\admin\storage\LocalStorage;
|
||
|
||
/**
|
||
* 拼图拖拽验证器
|
||
* @class ImageVerify
|
||
* @package think\admin\extend
|
||
*/
|
||
class ImageVerify
|
||
{
|
||
// 浮层圆半径
|
||
private $r = 10;
|
||
|
||
// 图片路径
|
||
private $srcImage;
|
||
|
||
// 浮层图宽高
|
||
private $picWidth = 100;
|
||
private $picHeight = 100;
|
||
|
||
// 目标图宽高
|
||
private $dstWidth = 600;
|
||
private $dstHeight = 300;
|
||
|
||
/**
|
||
* 验证器构造方法
|
||
* @param string $image 原始图片
|
||
* @param array $options 配置参数
|
||
*/
|
||
public function __construct(string $image, array $options = [])
|
||
{
|
||
if (!empty($options)) {
|
||
foreach ($options as $k => $v) {
|
||
if (isset($this->$k)) $this->$k = $v;
|
||
}
|
||
}
|
||
$this->srcImage = $image;
|
||
}
|
||
|
||
/**
|
||
* 生成图片拼图
|
||
* @param string $image 原始图片
|
||
* @param integer $time 缓存时间
|
||
* @param integer $diff 容错数值
|
||
* @param integer $retry 容错次数
|
||
* @return array [code, bgimg, water]
|
||
*/
|
||
public static function render(string $image, int $time = 1800, int $diff = 10, int $retry = 3): array
|
||
{
|
||
$data = (new static($image))->create();
|
||
$range = [$data['point'] - $diff, $data['point'] + $diff];
|
||
$result = ['retry' => $retry, 'error' => 0, 'expire' => time() + $time, 'range' => $range];
|
||
Library::$sapp->cache->set($code = CodeExtend::uniqidNumber(16, 'V'), $result, $time);
|
||
return ['code' => $code, 'bgimg' => $data['bgimg'], 'water' => $data['water']];
|
||
}
|
||
|
||
/**
|
||
* 在线验证是否通过
|
||
* @param string $code 验证码编码
|
||
* @param string $value 待验证数值
|
||
* @param boolean $clear 验证成功清理
|
||
* @return integer [ -1:需要刷新, 0:验证失败, 1:验证成功 ]
|
||
*/
|
||
public static function verify(string $code, string $value, bool $clear = false): int
|
||
{
|
||
$cache = Library::$sapp->cache->get($code);
|
||
if (empty($cache['range']) || empty($cache['retry'])) return -1;
|
||
if ($cache['range'][0] <= $value && $value <= $cache['range'][1]) {
|
||
$clear && Library::$sapp->cache->delete($code);
|
||
return 1;
|
||
}
|
||
// 验证失败记录次数
|
||
if (++$cache['error'] < $cache['retry']) {
|
||
if (($tll = $cache['expire'] - time()) > 0) {
|
||
Library::$sapp->cache->set($code, $cache, $tll);
|
||
return 0;
|
||
}
|
||
}
|
||
// 其他异常直接清空
|
||
Library::$sapp->cache->delete($code);
|
||
return -1;
|
||
}
|
||
|
||
/**
|
||
* 剧中裁剪图片
|
||
* @param string $image 图片资源
|
||
* @param integer $width 目标宽度
|
||
* @param integer $height 目标高度
|
||
* @return \GdImage|resource
|
||
*/
|
||
public static function cover(string $image, int $width, int $height)
|
||
{
|
||
// 读取缓存返回图片资源
|
||
$local = LocalStorage::instance();
|
||
$name = Storage::name(join('#', func_get_args()), 'png', 'cache');
|
||
if ($local->has($name, true)) return imageCreateFromString($local->get($name, true));
|
||
// 计算图片尺寸裁剪坐标
|
||
[$w, $h] = getimagesize($image);
|
||
if ($w > $h) {
|
||
[$_sw, $_sh, $_sx, $_sy] = [$h, $h, intval(($w - $h) / 2), 0];
|
||
} elseif ($w < $h) {
|
||
[$_sw, $_sh, $_sx, $_sy] = [$w, $w, 0, intval(($h - $w) / 2)];
|
||
} else {
|
||
[$_sw, $_sh, $_sx, $_sy] = [$w, $h, 0, 0];
|
||
}
|
||
$newim = imageCreateTrueColor($width, $height);
|
||
$srcim = imageCreateFromString(file_get_contents($image));
|
||
imagecopyresampled($newim, $srcim, 0, 0, $_sx, $_sy, $width, $height, $_sw, $_sh);
|
||
imagedestroy($srcim);
|
||
// 缓存图片内容
|
||
$file = $local->path($name, true);
|
||
is_dir($path = dirname($file)) || mkdir($path, 0755, true);
|
||
imagepng($newim, $file);
|
||
// 返回新图片资源
|
||
return $newim;
|
||
}
|
||
|
||
/**
|
||
* 创建背景图和浮层图、浮层图X坐标
|
||
* @return array [point, bgimg, water]
|
||
*/
|
||
public function create(): array
|
||
{
|
||
// 创建目标背景图画布
|
||
$dstim = $this->cover($this->srcImage, $this->dstWidth, $this->dstHeight);
|
||
|
||
// 生成透明底浮层图画布
|
||
$watim = imageCreateTrueColor($this->picWidth, $this->dstHeight);
|
||
imageSaveAlpha($watim, true) && imageAlphaBlending($watim, false);
|
||
imageFill($watim, 0, 0, imageColorAllocateAlpha($watim, 255, 255, 255, 127));
|
||
|
||
// 随机位置
|
||
$srcX1 = mt_rand(150, $this->dstWidth - $this->picWidth); // 水印位于大图X坐标
|
||
$srcY1 = mt_rand(0, $this->dstHeight - $this->picHeight); // 水印位于大图Y坐标
|
||
|
||
// 去除第二个干扰水印
|
||
// do { // 干扰位置
|
||
// $srcX2 = mt_rand(100, $this->dstWidth - $this->picWidth);
|
||
// $srcY2 = mt_rand(0, $this->dstHeight - $this->picHeight);
|
||
// } while (abs($srcX1 - $srcX2) < $this->picWidth);
|
||
|
||
// 水印边框颜色
|
||
$broders = [
|
||
imageColorAllocateAlpha($dstim, 250, 100, 0, 50),
|
||
imageColorAllocateAlpha($dstim, 250, 0, 100, 50),
|
||
imageColorAllocateAlpha($dstim, 100, 0, 250, 50),
|
||
imageColorAllocateAlpha($dstim, 100, 250, 0, 50),
|
||
imageColorAllocateAlpha($dstim, 0, 250, 100, 50),
|
||
];
|
||
shuffle($broders);
|
||
$c1 = array_pop($broders);
|
||
$c2 = array_pop($broders);
|
||
$gray = imageColorAllocateAlpha($dstim, 0, 0, 0, 80);
|
||
$blue = imageColorAllocateAlpha($watim, 0, 100, 250, 50);
|
||
|
||
// 取原图像素颜色，生成浮层图
|
||
$waters = $this->withWaterPoint();
|
||
for ($i = 0; $i < $this->picHeight; $i++) {
|
||
for ($j = 0; $j < $this->picWidth; $j++) {
|
||
if ($waters[$i][$j] === 1) {
|
||
if (
|
||
empty($waters[$i - 1][$j - 1]) || empty($waters[$i - 2][$j - 2]) ||
|
||
empty($waters[$i + 1][$j + 1]) || empty($waters[$i + 2][$j + 2])
|
||
) {
|
||
imagesetpixel($watim, $j, $srcY1 + $i, $blue);
|
||
} else {
|
||
imagesetpixel($watim, $j, $srcY1 + $i, ImageColorAt($dstim, $srcX1 + $j, $srcY1 + $i));
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
// 在原图挖坑，打上灰色水印
|
||
for ($i = 0; $i < $this->picHeight; $i++) {
|
||
for ($j = 0; $j < $this->picWidth; $j++) {
|
||
if ($waters[$i][$j] === 1) {
|
||
if (
|
||
empty($waters[$i - 1][$j - 1]) ||
|
||
empty($waters[$i - 2][$j - 2]) ||
|
||
empty($waters[$i + 1][$j + 1]) ||
|
||
empty($waters[$i + 2][$j + 2])
|
||
) {
|
||
imagesetpixel($dstim, $srcX1 + $j, $srcY1 + $i, $c1);
|
||
// 去除第二个干扰水印
|
||
// imagesetpixel($dstim, $srcX2 + $j, $srcY2 + $i, $c2);
|
||
} else {
|
||
imagesetpixel($dstim, $srcX1 + $j, $srcY1 + $i, $gray);
|
||
// 去除第二个干扰水印
|
||
// imagesetpixel($dstim, $srcX2 + $j, $srcY2 + $i, $gray);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
// 获取背景图及浮层图内容
|
||
[, , $bgimg] = [ob_start(), imagepng($dstim), ob_get_contents(), ob_end_clean(), imagedestroy($dstim)];
|
||
[, , $water] = [ob_start(), imagepng($watim), ob_get_contents(), ob_end_clean(), imagedestroy($watim)];
|
||
|
||
return [
|
||
'point' => $srcX1,
|
||
'bgimg' => 'data:image/png;base64,' . base64_encode($bgimg),
|
||
'water' => 'data:image/png;base64,' . base64_encode($water)
|
||
];
|
||
}
|
||
|
||
/**
|
||
* 计算水印矩阵坐标
|
||
* @return void
|
||
*/
|
||
private function withWaterPoint(): array
|
||
{
|
||
$waters = [];
|
||
// 半径平方
|
||
$dr = $this->r * $this->r;
|
||
$lw = $this->r * 2 - 5;
|
||
|
||
// 第一个圆中心点
|
||
$c_1_x = $lw + ($this->picWidth - $lw * 2) / 2;
|
||
$c_1_y = $this->r;
|
||
|
||
// 第二个圆中心点
|
||
$c_2_x = $this->picHeight - $this->r;
|
||
$c_2_y = $lw + ($this->picHeight - ($lw) * 2) / 2;
|
||
|
||
for ($i = 0; $i < $this->picHeight; $i++) {
|
||
for ($j = 0; $j < $this->picWidth; $j++) {
|
||
// 根据公式（x-a)² + (y-b)² = r² 算出像素是否在圆内
|
||
$d1 = pow($j - $c_1_x, 2) + pow($i - $c_1_y, 2);
|
||
$d2 = pow($j - $c_2_x, 2) + pow($i - $c_2_y, 2);
|
||
if (($i >= $lw && $j >= $lw && $i <= $this->picHeight - $lw && $j <= $this->picWidth - $lw) || $d1 <= $dr || $d2 <= $dr) {
|
||
$waters[$i][$j] = 1;
|
||
} else {
|
||
$waters[$i][$j] = 0;
|
||
}
|
||
}
|
||
}
|
||
|
||
return $waters;
|
||
}
|
||
} |