创建版本

2021-02-22 12:17:00 +08:00
commit af555f49c3
2332 changed files with 369202 additions and 0 deletions
@@ -0,0 +1,48 @@
+<?php namespace App\Support;
+
+use Session;
+
+class Captcha
+{
+    //显示验证码
+    public static function make($key = 'captcha')
+    {
+        header('Content-type:image/png');
+        //创建图片
+        $im = imagecreate(80, 30);
+        //第一次对imagecolorallocate()的调用会给基于调色板的图像填充背景色
+        $bg = imagecolorallocate($im, 255, 255, 255);
+        //验证码使用字体
+        $font_style = public_path('assets/fonts/milkcocoa.ttf');
+        //字符
+        $text_char = 'BCEFGHJKMPQRTVWXY2346789';
+        //字符间隔
+        $text_spac = 16;
+
+        $auth_code = '';
+
+        //产生随机字符
+        for ($i = 0; $i < 4; $i++) {
+            $font_color = imagecolorallocate($im, mt_rand(50, 200), mt_rand(0, 155), mt_rand(0, 155));
+            $text_str = $text_char[mt_rand(0, 23)];
+            imagettftext($im, 24, mt_rand(0, 20) - mt_rand(0, 25), 5 + $i * $text_spac, mt_rand(25, 30), $font_color, $font_style, $text_str);
+            $auth_code .= $text_str;
+        }
+        
+        //用户和用户输入验证码做比较
+        Session::put($key, $auth_code);
+     
+        //干扰点
+        for ($i = 0; $i < 250; $i++) {
+            imagesetpixel($im, rand(0, 130), rand(0, 145), $font_color);
+            imagesetpixel($im, rand(0, 130), rand(0, 145), $font_color);
+        }
+        imagepng($im);
+        imagedestroy($im);
+    }
+
+    public static function check($key, $value)
+    {
+        return Session::has($key) && Session::get($key) === strtoupper($value) ? true : false;
+    }
+}