Class for Generating Verification Code under Laravel

In this paper, we share the class of Laravel generating verification code for your reference. The specific contents are as follows

<?php
 
namespace App\Tool\Validate;
 
// Verification code class 
class ValidateCode {
  private $charset = 'abcdefghkmnprstuvwxyzABCDEFGHKMNPRSTUVWXYZ23456789';// Random factor 
  private $code;// Verification code 
  private $codelen = 4;// Verification code length 
  private $width = 130;// Width 
  private $height = 50;// Height 
  private $img;// Graphics resource handle 
  private $font;// Specified font 
  private $fontsize = 20;// Specify font size 
  private $fontcolor;// Specify font color 
 
  // Constructor initialization 
  public function __construct()
  {
    $this->font = public_path() . '/fonts/Elephant.ttf';// Note that the font path should be written correctly, otherwise the picture will not be displayed 
    $this->createCode();
  }
  // Generate random code 
  private function createCode()
  {
    $_len = strlen($this->charset) - 1;
    for ($i = 0;$i < $this->codelen;++$i) {
      $this->code .= $this->charset[mt_rand(0, $_len)];
    }
  }
  // Generation background 
  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);
  }
  // Generate text 
  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]);
    }
  }
  // Generate lines, snowflakes 
  private function createLine()
  {
    // Line 
    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), $color);
    }
    // Snowflake 
    for ($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), '*', $color);
    }
  }
  // Output 
  private function outPut()
  {
    header('Content-type:image/png');
    imagepng($this->img);
    imagedestroy($this->img);
  }
  // External generation 
  public function doimg()
  {
    $this->createBg();
    $this->createLine();
    $this->createFont();
    $this->outPut();
  }
  // Get verification code 
  public function getCode()
  {
    return strtolower($this->code);
  }
}