Laravel 下生成验证码的类

来源：互联网发布：q宠大乐斗门派心法数据编辑：程序博客网时间：2024/05/29 04:00
<?php
 
namespace App\Tool\Validate;
 
//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
    publicfunction __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
    privatefunction 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
    privatefunction 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
    privatefunction 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
    privatefunction 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), '*', $color);
        }
    }
    //输出
    privatefunction outPut()
    {
        header('Content-type:image/png');
        imagepng($this->img);
        imagedestroy($this->img);
    }
    //对外生成
    publicfunction doimg()
    {
        $this->createBg();
        $this->createLine();
        $this->createFont();
        $this->outPut();
    }
    //获取验证码
    publicfunction getCode()
    {
        returnstrtolower($this->code);
    }
}
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