laravel 图片验证码详解编程语言

composer require gregwar/captcha

<?php 
 
namespace App/Http/Controllers; 
 
use Illuminate/Http/Request; 
use Gregwar/Captcha/CaptchaBuilder; 
use Gregwar/Captcha/PhraseBuilder; 
 
class IndexController extends Controller 
{ 
    public function index() 
    { 
        return view('index'); 
    } 
 
 
    /** 
    * 设置并输出图片 
    */ 
    public function getCaptcha() 
    { 
        $phrase = new PhraseBuilder; 
        // 设置验证码位数 
        $code = $phrase->build(5); 
        // 生成验证码图片的Builder对象,配置相应属性 
        $builder = new CaptchaBuilder($code, $phrase); 
        // 设置背景颜色25,25,112 
        $builder->setBackgroundColor(25, 25, 112); 
        // 设置倾斜角度 
        $builder->setMaxAngle(25); 
        // 设置验证码后面最大行数 
        $builder->setMaxBehindLines(10); 
        // 设置验证码前面最大行数 
        $builder->setMaxFrontLines(10); 
        // 设置验证码颜色 
        $builder->setTextColor(255, 255, 0); 
        // 可以设置图片宽高及字体 
        $builder->build($width = 150, $height = 40, $font = null); 
 
        // 获取验证码的内容 
        $phrase = $builder->getPhrase(); 
        // 把内容存入session 
        session()->put('CAPTCHA_IMG', $phrase); 
 
        // 生成图片 
        header('Cache-Control: no-cache, must-revalidate'); 
        header('Content-Type:image/jpeg'); 
        $builder->output(); 
    } 
}