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
 
/* 
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 * 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';
  
 //創(chuàng)建驗(yàn)證碼餓字符創(chuàng)
 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;
 }
  
 //輸出圖像
 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();
 }
 
 
 //寫(xiě)入驗(yàn)證碼
 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;
 }
  
 //畫(huà)干擾線(xiàn)
 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);
  }
 }
  
 //得到驗(yàn)證碼
 public function getCode(){
  return strtoupper($this->code);
 }
 
 
 //輸出驗(yàn)證碼
 private function show_code(){
  header("Content-type:image/png");
  imagepng($this->img);
  imagedestroy($this->img);
 }
}

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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.