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【PHP】 PHP验证类
作者:summer-K / 发布于2012/3/6/ 596
<div><?php</div>
<div>class checkcode</div>
<div>{</div>
<div> //图像句柄</div>
<div> private $img;</div>
<div> //画布宽</div>
<div> public $width=85;</div>
<div> //画布搞</div>
<div> public $height=25;</div>
<div> //背景颜色</div>
<div> public $bg_color = "#DCDCDC";</div>
<div> //验证码</div>
<div> public $code;</div>
<div> //验证码库</div>
<div> public $code_str = "sadhadh1ui2y9822ur2r9283r9rqdadqe12423reffqadfja09sdf0rpafashdfqwer98fqortFP89EDFIOQHFWEFTrgwfOGUsgdfKHAEFUHuqGR";</div>
<div> //验证码长度</div>
<div> public $code_len = 4;</div>
<div> //验证码字体</div>
<div> public $font;</div>
<div> //字体大小</div>
<div> public $font_size = 16;</div>
<div> //字体颜色</div>
<div> public $font_color = "#ffffff";</div>
<div> </div>
<div> /*</div>
<div> * 构造函数</div>
<div> */</div>
<div> public function __construct()</div>
<div> {</div>
<div>   $this->font = "font".DIRECTORY_SEPARATOR."arial.ttf";</div>
<div> }
<div> /*</div>
<div> *验证码生成函数</div>
<div> */</div>
<div> private function create_code()</div>
<div> {</div>
<div>   $code=" ";</div>
<div>   for($i=0;$i<$this->code_len;$i++)</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span> {</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>   $code.=$this->code_str[mt_rand(0,strlen($this->code_str)-1)];</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span> }
<div><span class="Apple-tab-span" style="white-space:pre">	</span>  $this->code = $code;</div>
<div> }
<div> /*</div>
<div> *得到验证码</div>
<div> */</div>
<div> public function getcode()</div>
<div> {</div>
<div>   return strtoupper($this->code);</div>
<div> }
<div> /*</div>
<div> * 创建图画句柄</div>
<div> */</div>
<div> public function getimg()</div>
<div> {</div>
<div>   $w = $this->width;</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span> $h = $this->height;</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span> $img = imagecreatetruecolor($w,$h);</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span> $bg_color = imagecolorallocate($img,hexdec(substr($bg_color,1,2)),hexdec(substr($img,3,2)),hexdec(substr($img,5,2)));</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span> imagefill($img,0,0,$bg_color);</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span> $this->img = $img;</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span> $this->create_font();</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span> $this->create_pix();</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span> $this->show_code();</div>
<div> }
<div> /*</div>
<div> *创建字体</div>
<div> */</div>
<div> public function create_font()</div>
<div> {</div>
<div>   $this->create_code();</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>$color= $this->font_color;</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>$font_color = imagecolorallocate($this->img, hexdec(substr($color, 1,2)), hexdec(substr($color, 3,2)), hexdec(substr($color, 5,2)));</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>  $x = $this->width/$this->code_len;</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>  for($i=0;$i<$this->code_len;$i++){</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>   imagettftext($this->img, $this->font_size, mt_rand(-30, 30), $x*$i+mt_rand(3,6), mt_rand($this->height/1.2,$this->height-5), $font_color, $this->font, $this->code[$i]);</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>  }
<div><span class="Apple-tab-span" style="white-space:pre">	</span> $this->font_color = $font_color;</div>
<div> }
<div> /*</div>
<div> *写人干扰</div>
<div> */</div>
<div> private function create_pix()</div>
<div> {</div>
<div>  $pix_color = $this->font_color;</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span> for($i=0;$i<100;$i++)</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span> {</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>  imagesetpixel($this->img,mt_rand(0,$this->width),mt_rand(0,$this->height),$pix_color);</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span> }
<div><span class="Apple-tab-span" style="white-space:pre">	</span> for($j=0;$j<2;$j++)</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span> {</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>  imagesetthickness($this->img,mt_rand(2,4));</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>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);</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span> }
<div> }
<div> /*</div>
<div> *显示代码</div>
<div> */</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>private function show_code(){</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>header("Content-type:image/png");</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>imagepng($this->img);</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>imagedestroy($this->img);</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>}
<div>}
<div>?></div>
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