本人纯菜鸟,实在搞不懂,只能来请教大佬了。 就是想要验证码显示中文,内容里填,英文和数字都正常,填中文就不显示。 真心求助大佬帮帮改改。
- <?php
- class Captcha
- {
- var $width=’60’;
- var $num=’4′;
- var $height=’32’;
- var $name=’randcode’;
-
- public function __construct($conf="")
- {
- if($conf!="")
- {
- foreach($conf as $key=>$value)
- {
- $this->$key=$value;
- }
- }
-
-
- }
-
- function show()
- {
- $CI = & get_instance();
- $CI->load->library(‘session’);
-
- $border = 1; //是否要边框 1要:0不要
- $how = $this->num; //验证码位数
- $w = $this->width; //图片宽度
- $h = $this->height; //图片高度
- $fontsize = 24; //字体大小
- $alpha = "中文啊啊啊啊啊啊啊啊啊啊啊啊"; //验证码内容1
- $number = "中文啊啊啊啊啊啊啊啊啊啊啊"; //验证码内容2
- $randcode = ""; //验证码字符串初始化
- srand((double)microtime()*1000000); //初始化随机数种子
- $im = imagecreate($w,$h); //创建验证图片
-
- /*
- * 绘制基本框架
- */
- $bgcolor = imagecolorallocate($im, 255, 255, 255); //设置背景颜色
- ImageFill($im, 0, 0, $bgcolor); //填充背景色
- if($border)
- {
- $black = ImageColorAllocate($im, 0, 0, 0); //设置边框颜色
- ImageRectangle($im, 0, 0, $w-1, $h-1, $black);//绘制边框
- }
-
- /*
- * 逐位产生随机字符
- */
- for($i=0; $i<$how; $i++)
- {
- $alpha_or_number = mt_rand(0, 1); //字母还是数字
- $str = $alpha_or_number ? $alpha : $number;
- $which = mt_rand(0, strlen($str)-1); //取哪个字符
- $code = substr($str, $which, 1); //取字符
- $j = !$i ? 4 : $j+15; //绘字符位置
- $color3 = ImageColorAllocate($im, mt_rand(0,255), mt_rand(0,255), mt_rand(0,255)); //字符随即颜色
- imagettftext($im, 16, 0, $j, 24, $color3, ‘./simkai.ttf’, $code);
- $randcode .= $code; //逐位加入验证码字符串
- }
- /*
- * 添加干扰
- */
- for($i=0; $i<5; $i++)//绘背景干扰线
- {
- $color1 = ImageColorAllocate($im, mt_rand(0,255), mt_rand(0,255), mt_rand(0,255)); //干扰线颜色
- ImageArc($im, mt_rand(-5,$w), mt_rand(-5,$h), mt_rand(20,300), mt_rand(20,200), 55, 44, $color1); //干扰线
- }
- for($i=0; $i<$how*5; $i++)//绘背景干扰点
- {
- $color2 = ImageColorAllocate($im, mt_rand(0,255), mt_rand(0,255), mt_rand(0,255)); //干扰点颜色
- ImageSetPixel($im, mt_rand(0,$w), mt_rand(0,$h), $color2); //干扰点
- }
-
- $CI->session->set_userdata($this->name, $randcode);
- //ob_clean();
- /*绘图结束*/
- if (imagetypes() & IMG_GIF) {
- header ("Content-type: image/gif");
- $img=imagegif ($im);
- }
- elseif (imagetypes() & IMG_JPG) {
- header ("Content-type: image/jpeg");
- $img=imagejpeg ($im, "", 0.5);
- }
- elseif (imagetypes() & IMG_PNG) {
- header ("Content-type: image/png");
- $img=imagepng ($im, "", 0.5);
- }
- return $img;
- ImageDestroy($im);
- /*绘图结束*/
- }
- }
- ?>
复制代码
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