Initial project files: BESCMS full source

2026-08-13 23:37:46 +08:00
parent fa6cddb540
commit 2e26f85723
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+<?php namespace Phpcmf\Library;
+/**
+ * https://www.besyun.com
+ * BESCMS
+ * 本文件是框架系统文件，二次开发时不可以修改本文件，可以通过继承类方法来重写此文件
+ **/
+
+/**
+ * 验证码类
+ */
+class Captcha {
+
+    private $code;
+    private $charset = 'adehkmnprswyADEFGHKMNPRSTVWY683457'; //设置随机生成因子
+    private $width;
+    private $height;
+    private $img;
+    private $font;
+    private $fontsize = 16;
+    private $fontcolor;
+    private $randstring = ['*', '@', '$', '%', '&', '!'];
+
+    public function __construct() {
+        if (function_exists('my_captcha_ttf()')) {
+            $this->font = my_captcha_ttf();
+        } else {
+            $this->font = WRITEPATH.'captcha.ttf';
+            if (!is_file($this->font)) {
+                // 加载老版本的字体文件
+                $this->font = CONFIGPATH.'font/1.ttf';
+                if (!is_file($this->font)) {
+                    log_message('error', '验证码字体文件（'.WRITEPATH.'captcha.ttf）不存在，可能无法生成验证码');
+                }
+            }
+        }
+    }
+
+    // todo
+    public function create($width = 120, $height = 32) {
+
+        $this->_code();
+
+        $this->width = min(200, $width > 0 ? abs((int)$width) : 120);
+        $this->height = min(100, $height > 0 ? abs((int)$height) : 32);
+
+        $this->_bg();
+        $this->_line();
+        $this->_font();
+        $this->_show();
+
+
+        return $this->code;
+    }
+
+    //生成随机验证码
+    private function _code() {
+
+        if ($this->code) {
+            return $this->code;
+        }
+
+        $code = '';
+        $charset_len = strlen($this->charset) - 1;
+        for ($i = 0; $i < 4; $i++) {
+            $code.= $this->charset[rand(1, $charset_len)];
+        }
+
+        $this->code = trim($code);
+    }
+
+    //生成背景
+    private function _bg() {
+
+        $this->img = imagecreatetruecolor($this->width, $this->height);
+        $color = imagecolorallocate($this->img,255,255,255);
+        imagecolortransparent($this->img, $color);
+        imagefill($this->img,0,0, $color);
+    }
+
+    //生成文字
+    private function _font() {
+        $_x = $this->width / 4;
+        $this->fontcolor = imagecolorallocate($this->img, mt_rand(0,180), mt_rand(0,180), mt_rand(0,180));
+        for ($i=0; $i<4; $i++) {
+            imagettftext(
+                $this->img,
+                $this->fontsize,
+                mt_rand(-30,30),
+                intval($_x*$i+mt_rand(1,5)),
+                intval($this->height / 1.4),
+                $this->fontcolor,
+                $this->font,
+                $this->code[$i]
+            );
+        }
+    }
+
+    //生成干扰线条
+    private function _line() {
+        for ($i=0;$i<5;$i++) {
+            $color = imagecolorallocate($this->img, mt_rand(0,180), mt_rand(0,180), mt_rand(0,180));
+            imageline(
+                $this->img,
+                mt_rand(0,$this->width),
+                mt_rand(0,$this->height),
+                mt_rand(0,$this->width),
+                mt_rand(0,$this->height),
+                $color
+            );
+        }
+        for ($i=0;$i<30;$i++) {
+            $color = imagecolorallocate($this->img, mt_rand(100,255), mt_rand(100,255), mt_rand(100,255));
+            imagestring(
+                $this->img,
+                mt_rand(1,5),
+                mt_rand(0,$this->width),
+                mt_rand(0,$this->height),
+                $this->randstring[rand(0, 5)],
+                $color
+            );
+        }
+    }
+
+    //显示
+    private function _show() {
+        @ob_start();
+        @ob_clean(); //关键代码，防止出现'图像因其本身有错无法显示'的问题。
+        header('Content-type:image/png');
+        imagepng($this->img);
+        imagedestroy($this->img);
+    }
+}