这似乎是个问题的一个问题,但事实并非如此.
我问以下问题：
>编码员助手是否具有字体大小增加功能？即使我通过以下数组设置似乎没有改变.
‘font_size’=> 36
2.我使用的字体有以下字体大小,但仍然没有改变captcah大小
那有什么关系？
/* Setup config to pass into the create_captcha function */
$capache_config = array(
'img_path' => 'captcha/',
'img_url' => base_url() . 'captcha/',
'img_width' => '150',
'font_path' => base_url() . 'captcha/font/captcha4.ttf',
'img_height' => 40,
'expiration' => 7200
);
/* Generate the captcha */
$captcha = create_captcha($capache_config);
但是尺寸是即使增加宽度或高度我也不能让它变大？
你对此有何了解？
解决方法:
Codeigniter验证码助手不允许更改字体大小.以下内容将替换默认的create_captcha函数,并允许您更改字体大小.我使用的CodeIgniter版本是2.2.0.这是工作/测试代码.
步骤1：创建一个名为MY_captcha_helper.php的新助手文件,并将其保存在application / helper中CodeIgniter文件夹的根目录下.文件内容：
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
* CodeIgniter
*
* An open source application development framework for PHP 5.1.6 or newer
*
* @package CodeIgniter
* @author ExpressionEngine Dev Team
* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc.
* @license http://codeigniter.com/user_guide/license.html
* @link http://codeigniter.com
* @since Version 1.0
* @filesource
*/
// ------------------------------------------------------------------------
/**
* CodeIgniter CAPTCHA Helper
*
* @package CodeIgniter
* @subpackage Helpers
* @category Helpers
* @author ExpressionEngine Dev Team
* @link http://codeigniter.com/user_guide/helpers/xml_helper.html
*/
// ------------------------------------------------------------------------
/**
* Create CAPTCHA
*
* @access public
* @param array array of data for the CAPTCHA
* @param string path to create the image in
* @param string URL to the CAPTCHA image folder
* @param string server path to font
* @return string
*/
if ( ! function_exists('create_captcha'))
{
function create_captcha($data = '', $img_path = '', $img_url = '', $font_path = '')
{
$defaults = array('word' => '', 'img_path' => '', 'img_url' => '', 'img_width' => '150', 'img_height' => '30', 'font_path' => '', 'expiration' => 7200, 'font_size' => 5);
foreach ($defaults as $key => $val)
{
if ( ! is_array($data))
{
if ( ! isset($$key) OR $$key == '')
{
$$key = $val;
}
}
else
{
$$key = ( ! isset($data[$key])) ? $val : $data[$key];
}
}
if ($img_path == '' OR $img_url == '')
{
return FALSE;
}
if ( ! @is_dir($img_path))
{
return FALSE;
}
if ( ! is_writable($img_path))
{
return FALSE;
}
if ( ! extension_loaded('gd'))
{
return FALSE;
}
// -----------------------------------
// Remove old images
// -----------------------------------
list($usec, $sec) = explode(" ", microtime());
$now = ((float)$usec + (float)$sec);
$current_dir = @opendir($img_path);
while ($filename = @readdir($current_dir))
{
if ($filename != "." and $filename != ".." and $filename != "index.html")
{
$name = str_replace(".jpg", "", $filename);
if (($name + $expiration) < $now)
{
@unlink($img_path.$filename);
}
}
}
@closedir($current_dir);
// -----------------------------------
// Do we have a "word" yet?
// -----------------------------------
if ($word == '')
{
$pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
$str = '';
for ($i = 0; $i < 8; $i++)
{
$str .= substr($pool, mt_rand(0, strlen($pool) -1), 1);
}
$word = $str;
}
// -----------------------------------
// Determine angle and position
// -----------------------------------
$length = strlen($word);
$angle = ($length >= 6) ? rand(-($length-6), ($length-6)) : 0;
$x_axis = rand(6, (360/$length)-16);
$y_axis = ($angle >= 0 ) ? rand($img_height, $img_width) : rand(6, $img_height);
// -----------------------------------
// Create image
// -----------------------------------
// PHP.net recommends imagecreatetruecolor(), but it isn't always available
if (function_exists('imagecreatetruecolor'))
{
$im = imagecreatetruecolor($img_width, $img_height);
}
else
{
$im = imagecreate($img_width, $img_height);
}
// -----------------------------------
// Assign colors
// -----------------------------------
$bg_color = imagecolorallocate ($im, 255, 255, 255);
$border_color = imagecolorallocate ($im, 153, 102, 102);
$text_color = imagecolorallocate ($im, 204, 153, 153);
$grid_color = imagecolorallocate($im, 255, 182, 182);
$shadow_color = imagecolorallocate($im, 255, 240, 240);
// -----------------------------------
// Create the rectangle
// -----------------------------------
ImageFilledRectangle($im, 0, 0, $img_width, $img_height, $bg_color);
// -----------------------------------
// Create the spiral pattern
// -----------------------------------
$theta = 1;
$thetac = 7;
$radius = 16;
$circles = 20;
$points = 32;
for ($i = 0; $i < ($circles * $points) - 1; $i++)
{
$theta = $theta + $thetac;
$rad = $radius * ($i / $points );
$x = ($rad * cos($theta)) + $x_axis;
$y = ($rad * sin($theta)) + $y_axis;
$theta = $theta + $thetac;
$rad1 = $radius * (($i + 1) / $points);
$x1 = ($rad1 * cos($theta)) + $x_axis;
$y1 = ($rad1 * sin($theta )) + $y_axis;
imageline($im, $x, $y, $x1, $y1, $grid_color);
$theta = $theta - $thetac;
}
// -----------------------------------
// Write the text
// -----------------------------------
$use_font = ($font_path != '' AND file_exists($font_path) AND function_exists('imagettftext')) ? TRUE : FALSE;
if ($use_font == FALSE)
{
$font_size = $font_size != 5 ? $font_size : 5;
$x = rand(0, $img_width/($length/3));
$y = 0;
}
else
{
$font_size = $font_size != 5 ? $font_size : 16;
$x = rand(0, $img_width/($length/1.5));
$y = $font_size+2;
}
for ($i = 0; $i < strlen($word); $i++)
{
if ($use_font == FALSE)
{
$y = rand(0 , $img_height/2);
imagestring($im, $font_size, $x, $y, substr($word, $i, 1), $text_color);
$x += ($font_size*2);
}
else
{
$y = rand($img_height/2, $img_height-3);
imagettftext($im, $font_size, $angle, $x, $y, $text_color, $font_path, substr($word, $i, 1));
$x += $font_size;
}
}
// -----------------------------------
// Create the border
// -----------------------------------
imagerectangle($im, 0, 0, $img_width-1, $img_height-1, $border_color);
// -----------------------------------
// Generate the image
// -----------------------------------
$img_name = $now.'.jpg';
ImageJPEG($im, $img_path.$img_name);
$img = "<img src=\"$img_url$img_name\" width=\"$img_width\" height=\"$img_height\" style=\"border:0;\" alt=\" \" />";
ImageDestroy($im);
return array('word' => $word, 'time' => $now, 'image' => $img);
}
}
// ------------------------------------------------------------------------
/* End of file captcha_helper.php */
/* Location: ./system/heleprs/captcha_helper.php */
我改变了：
这个
$defaults = array('word' => '', 'img_path' => '', 'img_url' => '', 'img_width' => '150', 'img_height' => '30', 'font_path' => '', 'expiration' => 7200);
进入这个
$defaults = array('word' => '', 'img_path' => '', 'img_url' => '', 'img_width' => '150', 'img_height' => '30', 'font_path' => '', 'expiration' => 7200, 'font_size' => 5);
还有这个
if ($use_font == FALSE)
{
$font_size = 5;
$x = rand(0, $img_width/($length/3));
$y = 0;
}
else
{
$font_size = 16;
$x = rand(0, $img_width/($length/1.5));
$y = $font_size+2;
}
进入这个
if ($use_font == FALSE)
{
$font_size = $font_size != 5 ? $font_size : 5;
$x = rand(0, $img_width/($length/3));
$y = 0;
}
else
{
$font_size = $font_size != 5 ? $font_size : 16;
$x = rand(0, $img_width/($length/1.5));
$y = $font_size+2;
}
步骤2：在CodeIgniter文件夹的根目录下创建一个名为captcha的文件夹(您可能已经拥有它),并在apache current user / group下为其授予权限755.
第3步：在captcha / fonts下保存.ttf自定义字体.
第4步：您的控制器代码：
$this->load->helper('captcha');
$capache_config = array(
'img_path' => 'captcha/',
'img_url' => base_url() . 'captcha/',
'img_width' => 190,
'img_height' => 60,
'font_size' => 20,
'font_path' => FCPATH. 'captcha/font/verdana.ttf',
'expiration' => 7200
);
/* Generate the captcha */
$captcha = create_captcha($capache_config);
if ($captcha !== FALSE) {
echo $captcha['image'];
} else {
die('No captcha was created');
}
第5步：输出示例：