diff options
| author | ash <ashleybaker@gmail.com> | 2013-04-10 13:30:12 +0200 |
|---|---|---|
| committer | ash <ashleybaker@gmail.com> | 2013-04-10 13:30:12 +0200 |
| commit | 1aa336d53b686c07291bda4f8e9dd8ac23614fc3 (patch) | |
| tree | f437ff48067359a2228e09748a6fd12861616a69 /system/helpers/captcha_helper.php | |
| parent | 5eb1cbfa673bfa4b8a66ab8a56389a279c1f975b (diff) | |
Add options in create_captcha() to specify the randomly generated captcha word length and character pool
Uses the same defaults as were hard coded in (8 chars in length,
0-9a-aA-Z). Small change in this file means less code elsewhere when
generating random character strings for the captcha word.
Diffstat (limited to 'system/helpers/captcha_helper.php')
| -rw-r--r-- | system/helpers/captcha_helper.php | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/system/helpers/captcha_helper.php b/system/helpers/captcha_helper.php index 78e255a15..fe6c340be 100644 --- a/system/helpers/captcha_helper.php +++ b/system/helpers/captcha_helper.php @@ -51,7 +51,7 @@ if ( ! function_exists('create_captcha')) */ function create_captcha($data = '', $img_path = '', $img_url = '', $font_path = '') { - $defaults = array('word' => '', 'img_path' => '', 'img_url' => '', 'img_width' => '150', 'img_height' => '30', 'font_path' => '', 'expiration' => 7200); + $defaults = array('word' => '', 'img_path' => '', 'img_url' => '', 'img_width' => '150', 'img_height' => '30', 'font_path' => '', 'expiration' => 7200, 'captcha_word_length' => 8, 'character_pool_for_generted_word' => '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'); foreach ($defaults as $key => $val) { @@ -72,6 +72,17 @@ if ( ! function_exists('create_captcha')) return FALSE; } + + + // ----------------------------------- + // Make sure captcha max length is a valid/realistic value. + // ----------------------------------- + + $captcha_word_length = (int) $captcha_word_length; + if ($captcha_word_length < 4) { $captcha_word_length = 4;} + if ($captcha_word_length > 15) { $captcha_word_length = 15; } + + // ----------------------------------- // Remove old images // ----------------------------------- @@ -95,11 +106,10 @@ if ( ! function_exists('create_captcha')) if (empty($word)) { - $pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; $word = ''; - for ($i = 0, $mt_rand_max = strlen($pool) - 1; $i < 8; $i++) + for ($i = 0, $mt_rand_max = strlen($character_pool_for_generted_word) - 1; $i < $captcha_word_length; $i++) { - $word .= $pool[mt_rand(0, $mt_rand_max)]; + $word .= $character_pool_for_generted_word[mt_rand(0, $mt_rand_max)]; } } elseif ( ! is_string($word)) @@ -206,4 +216,5 @@ if ( ! function_exists('create_captcha')) } /* End of file captcha_helper.php */ -/* Location: ./system/helpers/captcha_helper.php */
\ No newline at end of file +/* Location: ./system/helpers/captcha_helper.php */ + |