0~9

script/php/captcha.php

@@ -21,7 +21,9 @@ function imgcode($nums, $width, $high)
 {
 
     //去除了數字0和1 字母小寫O和L，為了避免辨識不清楚
-    $str = "23456789abcdefghijkmnpqrstuvwxyzABCDEFGHIJKLMOPQRSTUBWXYZ";
+    $str = "1234567890";
+    //$str = "23456789abcdefghijkmnpqrstuvwxyzABCDEFGHIJKLMOPQRSTUBWXYZ";
+
     $code = '';
     for ($i = 0; $i < $nums; $i++) {
         $code .= $str[mt_rand(0, strlen($str) - 1)];