Laravel下生成验证码的类


            本文实例为大家分享了Laravel生成验证码的类，供大家参考，具体内容如下







<?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

  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);

  }

}





以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持中文源码网。