[Phpwiki-talk] Captcha.php get_captcha_random_word()

[Dan F. <dfr...@cs...>]

Thanks for the Captcha code. I integrated it into our WikiLens user 
account process (NewUserRegister plugin), although that is not yet live.

One change I made that might be interesting to you is that I generate 
random strings instead of taking words from a dictionary. I can see why 
you wouldn't want it, but here's the patch to Captcha if you do.

Dan


% cvs diff -r 1.1 -bu Captcha.php
Index: Captcha.php
===================================================================
RCS file: .../phpwiki/lib/Captcha.php,v
retrieving revision 1.1
retrieving revision 1.2
diff -b -u -r1.1 -r1.2
--- Captcha.php 28 Oct 2005 18:11:28 -0000      1.1
+++ Captcha.php 28 Oct 2005 18:11:51 -0000      1.2
@@ -35,6 +35,18 @@
     }
 }

+function get_captcha_random_word () {
+    // Pick a few random letters or numbers
+    $word = "";
+    // Don't use 1 <=> l or 0 (for o), because they're hard to read
+    $letters = "abcdefghijkmnopqrstuvwxyz23456789";
+    $letter_len = strlen($letters);
+    for ($i=0; $i<4; $i++) {
+        $word .= $letters[mt_rand(0, $letter_len-1)];
+    }
+    return $word;
+}
+
 // Draw the Spiral
 function spiral( &$im, $origin_x = 100, $origin_y = 100, $r = 0, $g = 
0, $b = 0 ) {
     $theta = 1;