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<?php
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namespace App\Http\Controllers\API;
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use Illuminate\Support\Facades\DB;
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use Intervention\Image\Facades\Image;
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class ImageVerificationController
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{
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public function GetCode()
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{
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// 可用字符（排除 0, o, O, i, I, l, 1）
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$characters = '23456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghjkmnpqrstuvwxyz';
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$length = 4;
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$captcha = '';
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for ($i = 0; $i < $length; $i++) {
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$captcha .= $characters[rand(0, strlen($characters) - 1)];
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}
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// 创建画布：宽120，高40，背景白色
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$width = 160;
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$height = 70;
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$image = Image::canvas($width, $height, '#ffffff');
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// 使用 GD 内置字体（无需 .ttf 文件）
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// font(5) 表示使用内置字体大小 5（最大）
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$image->text($captcha, $width / 2, $height / 2, function ($font) {
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$font->file(public_path('COOPBL.TTF'));
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$font->size(40); // GD 内置字体只支持 1-5
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$font->color('#000000');
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$font->align('center');
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$font->valign('middle');
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});
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// 添加干扰点（杂色）
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for ($i = 0; $i < 150; $i++) {
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$x = rand(0, $width);
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$y = rand(0, $height);
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$color = '#' . str_pad(dechex(rand(0, 0xFFFFFF)), 6, '0', STR_PAD_LEFT);
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$image->pixel($color, $x, $y);
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}
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for ($i = 0; $i < 3; $i++) {
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$image->line(
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rand(0, $width), rand(0, $height),
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rand(0, $width), rand(0, $height),
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function ($draw) {
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$draw->color('#' . str_pad(dechex(rand(0, 0xFFFFFF)), 6, '0', STR_PAD_LEFT));
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// 移除了设置宽度的部分
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}
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);
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}
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// 转为 Base64
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$base64 = 'data:image/png;base64,' . base64_encode($image->encode('png'));
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$id=DB::table('yanzhengma_image')->insertGetId([
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'code' => $captcha,
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'end_time' => date('Y-m-d H:i:s', strtotime('+5 minutes')),
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'created_at' => date('Y-m-d H:i:s'),
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]);
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if($id){
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return \Yz::Return(true,'获取成功',[
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'image' => $base64,
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'code_id' => $id,
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// 注意：生产环境不要返回明文验证码！仅用于调试
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//'debug_captcha' => $captcha,
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]);
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}else{
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return \Yz::echoError1('验证码获取失败');
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}
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}
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public function CheckCode(){
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$code_id = request('code_id');
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$code = request('code');
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$check=DB::table('yanzhengma_image')
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->where('id',$code_id)
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->where('code',$code)
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->where('end_time','>',date('Y-m-d H:i:s'))
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->where('status','1')
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->update([
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'status'=>'2'
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]);
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if($check){
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return \Yz::Return(true,'验证成功');
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}else{
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return \Yz::echoError1('验证码无效');
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}
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}
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}
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