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标题: PHP实现适用于自定义的验证码类 [打印本页]

作者: 新格网络 时间: 2018-2-14 05:35

         本文实例为大家分享了PHP验证码类，利用对象来实现的验证码类，供大家参考，具体内容如下
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;
  $($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;
  $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( $i=0;$icode_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;$iimg, mt_rand(0, $this->width),mt_rand(0, $this->height), $pix_color);
  }
  for($j=0;$jimg, mt_rand(1, 2));
imageline($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);
}
}
效果图：

精彩专题分享：ASP.NET验证码大全 PHP验证码大全 java验证码大全
以上就是使用对象编写的验证码类的全部内容，希望对大家学习PHP程序设计有所帮助。

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