2020.02新版

includes/ValidateCode.class.php

@@ -0,0 +1,75 @@
+<?php
+//验证码类
+class ValidateCode {
+private $charset = 'abcdefghkmnprstuvwxyzABCDEFGHKMNPRSTUVWXYZ23456789';    //随机因子
+    private $code;                            //验证码
+    private $codelen = 4;                    //验证码长度
+    private $width = 130;                    //宽度
+    private $height = 50;                    //高度
+    private $img;                                //图形资源句柄
+    private $font;                                //指定的字体
+    private $fontsize = 20;                //指定字体大小
+    private $fontcolor;                        //指定字体颜色
+
+    //构造方法初始化
+    public function __construct() {
+        $this->font = ROOT_PATH.'/../assets/font/elephant.ttf';
+    }
+
+    //生成随机码
+    private function createCode() {
+        $_len = strlen($this->charset)-1;
+        for ($i=0;$i<$this->codelen;$i++) {
+            $this->code .= $this->charset[mt_rand(0,$_len)];
+        }
+    }
+
+    //生成背景
+    private function createBg() {
+        $this->img = imagecreatetruecolor($this->width, $this->height);
+        $color = imagecolorallocate($this->img, mt_rand(157,255), mt_rand(157,255), mt_rand(157,255));
+        imagefilledrectangle($this->img,0,$this->height,$this->width,0,$color);
+    }
+
+    //生成文字
+    private function createFont() {    
+        $_x = $this->width / $this->codelen;
+        for ($i=0;$i<$this->codelen;$i++) {
+            $this->fontcolor = imagecolorallocate($this->img,mt_rand(0,156),mt_rand(0,156),mt_rand(0,156));
+            imagettftext($this->img,$this->fontsize,mt_rand(-30,30),$_x*$i+mt_rand(1,5),$this->height / 1.4,$this->fontcolor,$this->font,$this->code[$i]);
+        }
+    }
+
+    //生成线条、雪花
+    private function createLine() {
+        for ($i=0;$i<6;$i++) {
+            $color = imagecolorallocate($this->img,mt_rand(0,156),mt_rand(0,156),mt_rand(0,156));
+            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<100;$i++) {
+            $color = imagecolorallocate($this->img,mt_rand(200,255),mt_rand(200,255),mt_rand(200,255));
+            imagestring($this->img,mt_rand(1,5),mt_rand(0,$this->width),mt_rand(0,$this->height),'*',$color);
+        }
+    }
+
+    //输出
+    private function outPut() {
+        header('Content-type:image/png');
+        imagepng($this->img);
+        imagedestroy($this->img);
+    }
+
+    //对外生成
+    public function doimg() {
+        $this->createBg();
+        $this->createCode();
+        $this->createLine();
+        $this->createFont();
+        $this->outPut();
+    }
+
+    //获取验证码
+    public function getCode() {
+        return strtolower($this->code);
+    }
+}