<?phpsession_start();class Code{ ???//资源 ???private $img; ???//画布宽度 ???private $width=100; ???//画布高度 ???private $height=30; ???//背景颜色 ???private $bgColor=‘#ffffff‘; ???//验证码 ???private $code; ???//验证码的随机种子 ???private $codeStr=‘23456789abcdefghjkmnpqrstuvwsyz‘; ???//验证码长度 ???private $codeLen=4; ???//验证码字体 ???private $font; ???//验证码字体大小 ???private $fontSize=16; ???//验证码字体颜色 ???private $fontColor=‘‘; ???public function __construct() { ???} ???//创建验证码 ???public function make() ???{ ???????if(empty($this->font)) ???????{ ???????????$this->font = base_path().‘\public\out\consola.ttf‘; ???????} ???????$this->create();//生成验证码 ???????header("Content-type:image/png"); ???????imagepng($this->img); ???????imagedestroy($this->img); ???????exit; ???} ???//设置字体文件 ???public function font($font) ???{ ???????$this->font= $font; ???????return $this; ???} ???//设置文字大小 ???public function fontSize($fontSize) ???{ ???????$this->fontSize=$fontSize; ???????return $this; ???} ???//设置字体颜色 ???public function fontColor($fontColor) ???{ ???????$this->fontColor = $fontColor; ???????return $this; ???} ???//验证码数量 ???public function num($num) ???{ ???????$this->codeLen=$num; ???????return $this; ???} ???//设置宽度 ???public function width($width) ???{ ???????$this->width = $width; ???????return $this; ???} ???//设置高度 ???public function height($height) ???{ ???????$this->height = $height; ???????return $this; ???} ???//设置背景颜色 ???public function background($color) ???{ ???????$this->bgColor = $color; ???????return $this; ???} ???//返回验证码 ???public function get() { ???????return $_SESSION[‘code‘]; ???} ???//生成验证码 ???private function createCode() { ???????$code = ‘‘; ???????for ($i = 0; $i < $this->codeLen; $i++) { ???????????$code .= $this->codeStr [mt_rand(0, strlen($this->codeStr) - 1)]; ???????} ???????$this->code = strtoupper($code); ???????$_SESSION[‘code‘] = $this->code; ???} ???//建画布 ???private function create() { ???????if (!$this->checkGD()) ???????????return false; ???????$w = $this->width; ???????$h = $this->height; ???????$bgColor = $this->bgColor; ???????$img = imagecreatetruecolor($w, $h); ???????$bgColor = imagecolorallocate($img, hexdec(substr($bgColor, 1, 2)), hexdec(substr($bgColor, 3, 2)), hexdec(substr($bgColor, 5, 2))); ???????imagefill($img, 0, 0, $bgColor); ???????$this->img = $img; ???????$this->createLine(); ???????$this->createFont(); ???????$this->createPix(); ???????$this->createRec(); ???} ???//画线 ???private function createLine(){ ???????$w = $this->width; ???????$h = $this->height; ???????$line_color = "#dcdcdc"; ???????$color = imagecolorallocate($this->img, hexdec(substr($line_color, 1, 2)), hexdec(substr($line_color, 3, 2)), hexdec(substr($line_color, 5, 2))); ???????$l = $h/5; ???????for($i=1;$i<$l;$i++){ ???????????$step =$i*5; ???????????imageline($this->img, 0, $step, $w,$step, $color); ???????} ???????$l= $w/10; ???????for($i=1;$i<$l;$i++){ ???????????$step =$i*10; ???????????imageline($this->img, $step, 0, $step,$h, $color); ???????} ???} ???//画矩形边框 ???private function createRec() { ???????//imagerectangle($this->img, 0, 0, $this->width - 1, $this->height - 1, $this->fontColor); ???} ???//写入验证码文字 ???private function createFont() { ???????$this->createCode(); ???????$color = $this->fontColor; ???????if (!empty($color)) { ???????????$fontColor = imagecolorallocate($this->img, hexdec(substr($color, 1, 2)), hexdec(substr($color, 3, 2)), hexdec(substr($color, 5, 2))); ???????} ???????$x = ($this->width - 10) / $this->codeLen; ???????for ($i = 0; $i < $this->codeLen; $i++) { ???????????if (empty($color)) { ???????????????$fontColor = imagecolorallocate($this->img, mt_rand(50, 155), mt_rand(50, 155), mt_rand(50, 155)); ???????????} ???????????imagettftext($this->img, $this->fontSize, mt_rand(- 30, 30), $x * $i + mt_rand(6, 10), mt_rand($this->height / 1.3, $this->height - 5), $fontColor, $this->font, $this->code [$i]); ???????} ???????$this->fontColor = $fontColor; ???} ???//画线 ???private function createPix() { ???????$pix_color = $this->fontColor; ???????for ($i = 0; $i < 50; $i++) { ???????????imagesetpixel($this->img, mt_rand(0, $this->width), mt_rand(0, $this->height), $pix_color); ???????} ???????for ($i = 0; $i < 2; $i++) { ???????????imageline($this->img, mt_rand(0, $this->width), mt_rand(0, $this->height), mt_rand(0, $this->width), mt_rand(0, $this->height), $pix_color); ???????} ???????//画圆弧 ???????for ($i = 0; $i < 1; $i++) { ???????????// 设置画线宽度 ???????????imagearc($this->img, mt_rand(0, $this->width), mt_rand(0, $this->height), mt_rand(0, $this->width), mt_rand(0, $this->height) ???????????????, mt_rand(0, 160), mt_rand(0, 200), $pix_color); ???????} ???????imagesetthickness($this->img, 1); ???} ???//验证GD库 ???private function checkGD() { ???????return extension_loaded(‘gd‘) && function_exists("imagepng"); ???}}