2 files changed, 17 insertions, 1 deletions
diff --git a/phpBB/includes/captcha/captcha_gd.php b/phpBB/includes/captcha/captcha_gd.php
index 5f24618aab..ecdad43978 100644
--- a/phpBB/includes/captcha/captcha_gd.php
+++ b/phpBB/includes/captcha/captcha_gd.php
@@ -77,7 +77,7 @@ class captcha
 		{
 			$denom = ($code_len - $i);
 			$denom = max(1.3, $denom);
-			$offset[$i] = mt_rand(0, (1.5 * $width_avail) / $denom);
+			$offset[$i] = phpbb_mt_rand(0, (int) round((1.5 * $width_avail) / $denom));
 			$width_avail -= $offset[$i];
 		}
 
diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php
index 2d9d2c225f..c48eb6d102 100644
--- a/phpBB/includes/functions.php
+++ b/phpBB/includes/functions.php
@@ -250,6 +250,22 @@ function unique_id($extra = 'c')
 }
 
 /**
+* Wrapper for mt_rand() which allows swapping $min and $max parameters.
+*
+* PHP does not allow us to swap the order of the arguments for mt_rand() anymore.
+* (since PHP 5.3.4, see http://bugs.php.net/46587)
+*
+* @param int $min		Lowest value to be returned
+* @param int $max		Highest value to be returned
+*
+* @return int			Random integer between $min and $max (or $max and $min)
+*/
+function phpbb_mt_rand($min, $max)
+{
+	return ($min > $max) ? mt_rand($max, $min) : mt_rand($min, $max);
+}
+
+/**
 * Return formatted string for filesizes
 *
 * @param int	$value			filesize in bytes