PHP中验证码类及使用方法(3)

              }

       }

       //输出验证码图片

       function OutCheckImage()

       {

              $this ->OutFileHeader();

              $this ->CreateCheckCode();

              $this ->CreateImage();

              $this ->SetDisturbColor();

              $this ->WriteCheckCodeToImage();

              imagepng($this->mCheckImage);

              imagedestroy($this->mCheckImage);

       }

}

$c_check_code_image = new CCheckCodeFile();

//$c_check_code_image ->SetCheckImageWH(100,50);//设置显示验证码图片的尺寸

$c_check_code_image->OutCheckImage();

?>

使用方法:

<tr>

      <td align="center" valign="middle">验证码</td>

      <td align="center" valign="middle"><input name="number" type="text" style="width:80px;">

      <img src="code.php" id="yzm" onclick="this.src='code.php?abc='+Math.random()" alt="图片看不清？点击重新得到验证码" style="cursor:hand;" />

</td>

    </tr>

验证是否正确

session_start();

  if($_POST["number"] == $_SESSION["code_str"]){

  //      echo("验证码正确");

  }else{

        echo "

                     <script>

                            var s=10;

                            function ok()