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  • Laravel 下生成验证码的类

    <?php
    
    namespace AppToolValidate;
    
    //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 = public_path() . '/fonts/Elephant.ttf';//注意字体路径要写对,否则显示不了图片
            $this->createCode();
        }
        //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()
        {
            //线条
            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), $color);
            }
            //雪花
            for ($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->createLine();
            $this->createFont();
            $this->outPut();
        }
        //获取验证码
        public function getCode()
        {
            return strtolower($this->code);
        }
    }
    

      

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  • 原文地址:https://www.cnblogs.com/sunshenggang/p/7772307.html
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