ECMall Ecmall二次开发 - PHP技术-

<?php    
session_start();    
{    
$authcode = new AuthCode();    
$authcode->OutputImg();    
}    
class AuthCode    
{    
var $image;    
var $sBgcolor;    
var $nWidth;    
var $nHeight;    
var $nLen;    
var $bNoise;    
var $nNoise;    
var $bBorder;    
var $aFontlist;    
function AuthCode()    
{    
  $this->sBgcolor = "#FFFFFF";    
  $this->nWidth = 70;    
  $this->nHeight = 25;    
  $this->nLeftMargin = 5;    
  $this->nRightMargin = 5;    
  $this->nTopMargin = 3;    
  $this->nBottomMargin = 2;    
  $this->nLen = 4;    
  $this->bNoise = true;    
  $this->nNoisePoint = 50;    
  $this->nNoiseLine = 5;    
  $this->bBorder = true;    
      
  $this->aFontlist = "arial.ttf";    
}    
  
function OutputImg()    
{    
  $this->image = "";    
  $this->image = imagecreate($this->nWidth, $this->nHeight);    
  $back = $this->getcolor($this->sBgcolor);    
  imagefilledrectangle($this->image, 0, 0, $this->nWidth, $this->nHeight, $back);    
  $size = ($this->nWidth - $this->nLeftMargin - $this->nRightMargin)/$this->nLen;    
  if($size>($this->nHeight - $this->nTopMargin - $this->nBottomMargin))    
   $size=$this->nHeight - $this->nTopMargin - $this->nBottomMargin;    
      
  $left = ($this->nWidth-$this->nLen*($size+$size/10))/2 + $this->nLeftMargin;    
  $code = "";    
  for ($i=0; $i<$this->nLen; $i++)    
  {    
   $randtext = rand(0, 9);    
   $code .= $randtext;    
   $textColor = imagecolorallocate($this->image, rand(0, 100), rand(0, 100), rand(0, 100));    
   $font = $this->aFontlist;    
   $randsize = rand($size-$size/10, $size+$size/10);    
   $location = $left+($i*$size+$size/10);    
   imagettftext($this->image, $randsize, rand(-18,18), $location, rand($size, $size+$size/5) + $this->nTopMargin, $textColor, $font, $randtext);    
  }    
  if($this->bNoise == true) $this->setnoise();    
  $_SESSION['AuthCode'] = md5($code);    
  $bordercolor = $this->getcolor("#FFFFFF");    
  if($this->bBorder==true) imagerectangle($this->image, 0, 0, $this->nWidth-1, $this->nHeight-1, $bordercolor);    
  header("Content-type: image/png");    
  imagepng($this->image);    
  imagedestroy($this->image);    
}    
function setnoise()//设置噪点    
{    
  for ($i=0; $i<$this->nNoiseLine; $i++){    
   $randColor = imagecolorallocate($this->image, rand(0, 255), rand(0, 255), rand(0, 255));    
   imageline($this->image, rand(0, $this->nWidth), rand(0, $this->nHeight), rand(0, $this->nWidth), rand(0, $this->nHeight), $randColor);    
  }    
      
  for ($i=0; $i<$this->nNoisePoint; $i++){    
   $randColor = imagecolorallocate($this->image, rand(0, 255), rand(0, 255), rand(0, 255));      
   imagesetpixel($this->image, rand(0, $this->nWidth), rand(0, $this->nHeight), $randColor);    
  }    
}    
function getcolor($color)//将Hex颜色格式转换成RGB格式    
{    
   $color = eregi_replace ("^#","",$color);    
   $r = $color[0].$color[1];    
   $r = hexdec ($r);    
   $b = $color[2].$color[3];    
   $b = hexdec ($b);    
   $g = $color[4].$color[5];    
   $g = hexdec ($g);    
   $color = imagecolorallocate ($this->image, $r, $b, $g);    
   return $color;    
}    
}    
?>