laravel5 验证码 及 乱码

首先在laravel5框架public目录下创建一个控制器Code.php类,代码如下:

<?php

/**
 * Created by PhpStorm.
 * User: ren68
 * Date: 2018/7/11
 * Time: 12:41
 */
class Code
{
    private $width; //宽
    private $height; //高
    private $num;  //数量
    private $code; //验证码
    private $img;  //图像的资源

    //构造方法, 三个参数
    function __construct($width=80, $height=20, $num=4) {
        $this->width = $width;
        $this->height = $height;
        $this->num = $num;
        $this->code = $this->createcode(); //调用自己的方法
    }

    //获取字符的验证码, 用于保存在服务器中
    function getcode() {
        return $this->code;
    }

    //输出图像
    function outimg() {
        //创建背景 (颜色, 大小, 边框)
        $this->createback();

        //画字 (大小, 字体颜色)
        $this->outstring();

        //干扰元素(点, 线条)

        $this->setdisturbcolor();
        //输出图像
        $this->printimg();
    }

    //创建背景
    private function createback() {
        //创建资源
        $this->img = imagecreatetruecolor($this->width, $this->height);
        //设置随机的背景颜色
        $bgcolor = imagecolorallocate($this->img, rand(225, 255), rand(225, 255), rand(225, 255));
        //设置背景填充
        imagefill($this->img, 0, 0, $bgcolor);
        //画边框
        $bordercolor = imagecolorallocate($this->img, 0, 0, 0);

        imagerectangle($this->img, 0, 0, $this->width-1, $this->height-1, $bordercolor);
    }

    //画字
    private function outstring() {
        for($i=0; $i<$this->num; $i++) {

            $color= imagecolorallocate($this->img, rand(0, 128), rand(0, 128), rand(0, 128));

            $fontsize=rand(3,5); //字体大小

            $x = 3+($this->width/$this->num)*$i; //水平位置
            $y = rand(0, imagefontheight($fontsize)-3);

            //画出每个字符
            imagechar($this->img, $fontsize, $x, $y, $this->code{$i}, $color);
        }
    }

    //设置干扰元素
    private function setdisturbcolor() {
        //加上点数
//        for($i=0; $i<100; $i++) {
//            $color= imagecolorallocate($this->img, rand(0, 255), rand(0, 255), rand(0, 255));
//            imagesetpixel($this->img, rand(1, $this->width-2), rand(1, $this->height-2), $color);
//        }

        //加线条
        for($i=0; $i<10; $i++) {
            $color= imagecolorallocate($this->img, rand(0, 255), rand(0, 128), rand(0, 255));
            imagearc($this->img,rand(-10, $this->width+10), rand(-10, $this->height+10), rand(30, 300), rand(30, 300), 55,44, $color);
        }
    }

    //输出图像
    private function printimg() {
        if (imagetypes() & IMG_GIF) {
            header("Content-type: image/gif");
            imagegif($this->img);
        } elseif (function_exists("imagejpeg")) {
            header("Content-type: image/jpeg");
            imagegif($this->img);
        } elseif (imagetypes() & IMG_PNG) {
            header("Content-type: image/png");
            imagegif($this->img);
        } else {
            die("No image support in this PHP server");
        }

    }

    //生成验证码字符串
    private function createcode() {
        $codes = "3456789abcdefghijkmnpqrstuvwxyABCDEFGHIJKLMNPQRSTUVWXY";

        $code = "";

        for($i=0; $i < $this->num; $i++) {
            $code .=$codes{rand(0, strlen($codes)-1)};
        }

        return $code;
    }

    //用于自动销毁图像资源
    function __destruct() {
        imagedestroy($this->img);exit;
    }

}

然后在你需要的控制器方法中调用(我是在LoginController中调用的):


前端页面验证码显示代码:

<img src="{{url('/admin/code')}}" title="刷新一下" onclick="this.src='{{url('/admin/code')}}?'+Math.random()">

乱码问题如图:


解决办法:


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转载自blog.csdn.net/qq_36746815/article/details/81000709