PHP生成图片验证码demo【OOP面向对象版本】
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2022-03-21 19:17:59
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PHP生成图片验证码demo【OOP面向对象版本】
下面是我今天下午用PHP写的一个生成图片验证码demo,仅供参考。
这个demo总共分为4个文件,具体代码如下:
1、code.html中的代码:
登录、注册验证码生成
2、createcode.class.php中的代码:
gdcheck()){ $this->img_width = $img_width; $this->img_height = $img_height; $this->str_content = $str_content; $this->code_content_color = $code_content_color; $this->get_code(); $this->session_code(); } } //生成画布 public function get_img(){ //定义画布 $this->img = imagecreatetruecolor($this->img_width, $this->img_height); //画布背景色 $this->img_bgcolor = imagecolorallocate($this->img, mt_rand(0,255), mt_rand(0,255), mt_rand(0,255)); //给画图填充背景色 imagefill($this->img, 0, 0, $this->img_bgcolor); //取得画布的宽高 $img_width = imagesx($this->img); $img_height = imagesy($this->img); //画布中插入验证码 imagestring($this->img, 5, ($this->img_width/3), ($this->img_height/2.5), $this->code_content, imagecolorallocate($this->img, hexdec(substr($this->code_content_color, 1,2)), hexdec(substr($this->code_content_color, 3,2)), hexdec(substr($this->code_content_color, 5,2)))); //画布中插入像素点 $this->get_pix(); //画布中插入直线 $this->get_line(); //画布显示 header('Content-type:image/png'); imagepng($this->img); } //生成验证码 private function get_code(){ $str_content_len = strlen($this->str_content); for($i=0;$icode_content .= substr($this->str_content, mt_rand(0,$str_content_len-1),1); } } //生成像素点 private function get_pix(){ for($j=0;$jimg, mt_rand(0,$this->img_width), mt_rand(0,$this->img_height), imagecolorallocate($this->img, mt_rand(0,255), mt_rand(0,255), mt_rand(0,255))); } return $image_pix; } //生成直线 private function get_line(){ for($l=0;$limg, mt_rand(0,$this->img_width), mt_rand(0,$this->img_height), mt_rand(0,$this->img_width), mt_rand(0,$this->img_height), imagecolorallocate($this->img, mt_rand(0,255), mt_rand(0,255), mt_rand(0,255))); } return $img_line; } //session存储验证码 private function session_code(){ session_start(); $_SESSION['code'] = $this->code_content; } //判断程序是否支持GD库 private function gdcheck(){ if(extension_loaded('gd')){ return true; }else{ return false; exit(); } } }
3、checkcode.php中的代码:
alert("验证码填写成功"); history.go(-1); '; }else{ echo ''; } }
4、showcode.php中的代码:
get_img();
原文地址:http://www.zymseo.com/php/334.html
转载请注明出处!
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