首先, 為了方便使用, 我們先用下頭的程式產生 0-9 的圖檔:

<?php
 
$aData[0] = "零";
$aData[1] = "一";
$aData[2] = "二";
$aData[3] = "三";
$aData[4] = "四";
$aData[5] = "五";
$aData[6] = "六";
$aData[7] = "七";
$aData[8] = "八";
$aData[9] = "九";
 
$font = "/usr/share/fonts/truetype/msjhbd.ttf";
 
foreach ($aData as $num => $str) {
    $im = ImageCreate(24, 24);
    $background = ImageColorAllocate($im, 255, 255, 255);
    $fontcolor = ImageColorAllocate($im, 0, 0, 0);
    ImageTTFText($im, 16, 0, 2, 21, $fontcolor, $font, $str);
    ImagePNG($im, $num.'.png');
    ImageDestroy($im);
}
 
?>

如果你要使用別的字型, 把 font 改成你喜歡的字型檔就可以. 把產生的 png 檔案, 在 authimage 的路徑下建立一個 image 的子目錄, 把檔案放到裡頭.

然後把原本的 pluginauthimage.class.php 裡頭的 showImage() 改成下頭的內容:

        function showImage() {
            // Delete those cached authimage files that never used
            $this->deleteExpiredAuthImage($this->expiredTime);
 
define( "AUTHIMAGE_IMAGE_FOLDER", PLOG_CLASS_PATH."plugins/authimage/image/" );
 
            $code = $this->generateCode();
            $encrypt = $this->encrypt($code, $this->key);
            $background = AUTHIMAGE_BACKGROUND_FOLDER.$this->default;
            $tempFile = $this->cacheFolder."/".$encrypt.".gif";
 
            $len = strlen($code);
            $image = ImageCreate(24 * $len, 24);
            $im_bg = ImageCreateFromGIF($background);
            if ($im_bg) {
                list($bg_width, $bg_height, $bg_type, $bg_attr) = @GetImageSize($background);
                if (function_exists('ImageCopyReSampled'))
                    ImageCopyReSampled($image, $im_bg, 0, 0, 0, 0, 24 * $len, 24, $bg_width, $bg_height);
                else
                    ImageCopyReSized($image, $im_bg, 0, 0, 0, 0, 24 * $len, 24, $bg_width, $bg_height);
                ImageDestroy($im_bg);
 
            }
            for ($i = 0; $i < $len; $i++)  {
                $im_num = @ImageCreateFromPNG(AUTHIMAGE_IMAGE_FOLDER.$code[$i].'.png');
                if ($im_num) {
                    ImageColorTransparent($im_num, ImageColorAt($im_num, 0, 0));
                    ImageCopy($image, $im_num, 24 * $i, 0, 0, 0, 24, 24);
                    ImageDestroy($im_num);
                }
            }
 
            ImagePNG($image, $tempFile);
 
            ImageDestroy($image);
 
            $temp = fopen($tempFile,"rb");
            $buffer = fread($temp,filesize($tempFile));
            fclose($temp);
            // Now zero-length the file. No need for its content anymore.
            $temp = fopen($tempFile,"w");
            fwrite($temp, NULL);
            fclose($temp);
 
            // Now chmod it so it can be deleted later by the user
            chmod($tempFile, 0666);
 
            header("Content-type: image/png");
            echo $buffer;
        }

這樣子就可以顯示中文數字的圖型了.

如果不知如何產生圖檔或修改程式, 可以抓這個檔案 http://www.teatime.com.tw/~tommy/files/lifetype/lifetype_authimage_chinese.tgz 回去, 在 authimage 的目錄解開來, 覆蓋原有的檔案就可以了.