[ticket/13454] Remove unused variables

This is the first part of the changes. More to come.

PHPBB3-13454

phpBB/phpbb/captcha/gd.php

@@ -97,13 +97,12 @@ class gd
 
 		if ($config['captcha_gd_3d_noise'])
 		{
-			$xoffset = mt_rand(0,9);
 			$noise_bitmaps = $this->captcha_noise_bg_bitmaps();
 			for ($i = 0; $i < $code_len; ++$i)
 			{
 				$noise[$i] = new char_cube3d($noise_bitmaps, mt_rand(1, sizeof($noise_bitmaps['data'])));
 
-				list($min, $max) = $noise[$i]->range();
+				$noise[$i]->range();
 				//$box = $noise[$i]->dimensions($sizes[$i]);
 			}
 			$xoffset = 0;
@@ -151,8 +150,6 @@ class gd
 	*/
 	function wave($img)
 	{
-		global $config;
-
 		$period_x = mt_rand(12,18);
 		$period_y = mt_rand(7,14);
 		$amp_x = mt_rand(5,10);

phpBB/phpbb/captcha/gd_wave.php

@@ -23,8 +23,6 @@ class gd_wave
 
 	function execute($code, $seed)
 	{
-		global $starttime;
-
 		// seed the random generator
 		mt_srand($seed);
 
@@ -77,7 +75,6 @@ class gd_wave
 		// TODO
 		$background = imagecolorallocate($img, mt_rand(155, 255), mt_rand(155, 255), mt_rand(155, 255));
 		imagefill($img, 0, 0, $background);
-		$black = imagecolorallocate($img, 0, 0, 0);
 
 		$random = array();
 		$fontcolors = array();
@@ -155,7 +152,7 @@ class gd_wave
 		// rather than recalculating from absolute coordinates
 		// What we cache into the $img_buffer contains the raised text coordinates.
 		$img_pos_prev	= $img_buffer[0][0] = array($box['upper_left']['x'], $box['upper_left']['y']);
-		$cur_height		= $prev_height = $this->wave_height(0, 0, $subdivision_factor);
+		$prev_height = $this->wave_height(0, 0, $subdivision_factor);
 		$full_x			= $plane_x * $subdivision_factor;
 		$full_y			= $plane_y * $subdivision_factor;
 

phpBB/phpbb/captcha/plugins/captcha_abstract.php

@@ -34,7 +34,7 @@ abstract class captcha_abstract
 
 	function init($type)
 	{
-		global $config, $db, $user, $request;
+		global $config, $request;
 
 		// read input
 		$this->confirm_id = $request->variable('confirm_id', '');
@@ -56,8 +56,6 @@ abstract class captcha_abstract
 
 	function execute_demo()
 	{
-		global $user;
-
 		$this->code = gen_rand_string_friendly(mt_rand(CAPTCHA_MIN_CHARS, CAPTCHA_MAX_CHARS));
 		$this->seed = hexdec(substr(unique_id(), 4, 10));
 
@@ -117,7 +115,7 @@ abstract class captcha_abstract
 
 	function get_demo_template($id)
 	{
-		global $config, $user, $template, $request, $phpbb_admin_path, $phpEx;
+		global $config, $template, $request, $phpbb_admin_path, $phpEx;
 
 		$variables = '';
 
@@ -153,7 +151,7 @@ abstract class captcha_abstract
 
 	function garbage_collect($type)
 	{
-		global $db, $config;
+		global $db;
 
 		$sql = 'SELECT DISTINCT c.session_id
 			FROM ' . CONFIRM_TABLE . ' c

phpBB/phpbb/captcha/plugins/gd.php

@@ -53,18 +53,11 @@ class gd extends captcha_abstract
 
 	function acp_page($id, &$module)
 	{
-		global $db, $user, $auth, $template, $phpbb_log, $request;
-		global $config, $phpbb_root_path, $phpbb_admin_path, $phpEx;
+		global $user, $template, $phpbb_log, $request;
+		global $config;
 
 		$user->add_lang('acp/board');
 
-		$config_vars = array(
-			'enable_confirm'		=> 'REG_ENABLE',
-			'enable_post_confirm'	=> 'POST_ENABLE',
-			'confirm_refresh'		=> 'CONFIRM_REFRESH',
-			'captcha_gd'			=> 'CAPTCHA_GD',
-		);
-
 		$module->tpl_name = 'captcha_gd_acp';
 		$module->page_title = 'ACP_VC_SETTINGS';
 		$form_key = 'acp_captcha';

phpBB/phpbb/captcha/plugins/gd_wave.php

@@ -35,7 +35,7 @@ class gd_wave extends captcha_abstract
 
 	function acp_page($id, &$module)
 	{
-		global $config, $db, $template, $user;
+		global $user;
 
 		trigger_error($user->lang['CAPTCHA_NO_OPTIONS'] . adm_back_link($module->u_action));
 	}