PHP implementation is suitable for custom verification code classes, php verification code

PHP implementation is suitable for custom verification code classes, php verification code

The examples in this article share with you the PHP verification code class, which is implemented using objects. For your reference, the specific content is as follows

<&#63;php
 
/* 
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
Class Image{
  
 private $img;
 public $width = 85;
 public $height = 25;
 public $code;
 public $code_len = 4;
 public $code_str = "329832983DSDSKDSLKQWEWQ2lkfDSFSDjfdsfdsjwlkfj93290KFDSKJFDSOIDSLK";
 public $bg_color = '#DCDCDC';
 public $font_size = 16;
 public $font = 'font.ttf';
 public $font_color = '#000000';
  
 //创建验证码饿字符创
 public function create_code(){
  $code = '';
  for( $i=0;$i<$this->code_len;$i++ ){
   $code .= $this->code_str[mt_rand(0, strlen($this->code_str)-1)];
 }
  return $this->code = $code;
 }
  
 //输出图像
 public function getImage(){
  $w = $this->width;
  $h = $this->height;
  $bg_color = $this->bg_color;
  $img = imagecreatetruecolor($w, $h);
  $bg_color = imagecolorallocate($img, 
 hexdec(substr($bg_color, 1,2)), hexdec(substr($bg_color, 3,2)), hexdec(substr($bg_color, 5,2)));
 imagefill($img, 0, 0, $bg_color);
  $this->img = $img;
  $this->create_font();
  $this->create_pix();
 $this->show_code();
 }
 
 
 //写入验证码
 public function create_font(){
  $this->create_code();
  $color = $this->font_color;
  $font_color = imagecolorallocate($this->img, hexdec(substr($color,1,2)), hexdec(substr($color, 3,2)), hexdec(substr($color,5,2)));
  $x = $this->width/$this->code_len;
  for( $i=0;$i<$this->code_len;$i++ ){
   $txt_color = imagecolorallocate($this->img, mt_rand(0,100), mt_rand(0, 150), mt_rand(0, 200));
   imagettftext($this->img, $this->font_size, mt_rand(-30, 30), $x*$i+mt_rand(3, 6), mt_rand($this->height/1.2, $this->height), $txt_color, $this->font , $this->code[$i]); 
   //imagestring($this->img, $this->font_size, $x*$i+mt_rand(3, 6),mt_rand(0, $this->height/4) , $this->code[$i], $font_color);
  }
  $this->font_color = $font_color;
 }
  
 //画干扰线
 public function create_pix(){
  $pix_color= $this->font_color;
  for($i=0;$i<100;$i++){
   imagesetpixel($this->img, mt_rand(0, $this->width),mt_rand(0, $this->height), $pix_color);
  }
  for($j=0;$j<4;$j++){
   imagesetthickness($this->img, mt_rand(1, 2));
   imageline($this->img, mt_rand(0, $this->width), mt_rand(0, $this->height), mt_rand(0, $this->width), mt_rand(0, $this->height), $pix_color);
  }
 }
  
 //得到验证码
 public function getCode(){
  return strtoupper($this->code);
 }
 
 
 //输出验证码
 private function show_code(){
  header("Content-type:image/png");
  imagepng($this->img);
  imagedestroy($this->img);
 }
}

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Wonderful topic sharing: ASP.NET verification code collection PHP verification code collection java verification code collection

The above is the entire content of the verification code class written using objects. I hope it will be helpful for everyone to learn PHP programming.