/**---------------------------------------------------------------------------*/
/** PHP验证码类
/** @版权注释
/** 原创 张灿庭 如果您有任何疑问和想法可以发邮件(123294587@qq.com)
/** 本类允许转载、复制和修改，但转载、复制和修改的同时请保留原始的出处和作者声明，这也是对作者劳动成果的一种尊重！
/**---------------------------------------------------------------------------*/
//过期时间 300秒
session_set_cookie_params(300);
// 开启session
session_start();
//头部 防止缓存
header("Cache-Control: no-cache, must-revalidate");
header("Pragma: no-cache");
header('Content-Type:image/gif');
$code = new CodeClass(); //调用类
$code->type = 0; //类型 0. 数字 1. 英文 2. 英文 数字
$code->transparent = true; //透明
$code->solid = true; //边框
$code->noise = 50; //噪点
$code->line = 0; //干扰线
$code->arc = 0; //弧线
$code->dashed = 0; //虚线
$code->output('AuthCode'); //输出验证码
unset($code);
class CodeClass {
private $img, $width, $height;
public $type, $transparent, $solid, $noise, $dashed, $arc, $line;
function __construct(){
$this->width = 60; //宽度
$this->height = 20; //高度
$this->img = imagecreatetruecolor($this->width, $this->height);
}
//输出验证码
public function output ($name){
//透明背景
if($this->transparent == true){
imagefill($this->img, 0, 0, imagecolorallocate($this->img, 255, 255, 255)); //填充白色
//imagecolortransparent($this->img, imagecolorallocate($this->img, 255, 255, 255)); //背景透明
}
//灰色边框
if($this->solid == true){
imagerectangle($this->img, 0, 0, $this->width-1, $this->height-1, imagecolorallocate($this->img, 204, 204, 204));
}
//干扰像素
$this->drawpixel();
//干扰线
$this->drawline();
//弧线
$this->drawarc();
//虚线
$this->drawdashed();
//写入文字
$text = $this->text();
$string = $text[0];
$count = count($string);
$width = imagefontwidth(5); //字体宽度
$height = imagefontheight(5); //字体高度
$start = ($this->width - $count * $width) / 2; //居中
$y = floor($this->height - $height) / 2; //居中
for($i = 0; $i < $count; $i ){
$str = $string[$i];
$rgb = $this->color();
$color = imagecolorallocate($this->img, $rgb['r'], $rgb['g'], $rgb['b']);
$x = empty($x) ? $start : $x $width;
imagestring($this->img, 5, $x, $y, $str, $color); //横向文字
$start = $start $width;
}
$_SESSION[$name] = $text[1];
//输出图像
imagegif($this->img);
}
//相加
private function text (){
$text = '0123456789';
$m = substr($text, rand(0, strlen($text) -1), 1);
$n = substr($text, rand(0, strlen($text) -1), 1);
$str[] = array($m, ' ', $n, '=', '?');
$str[] = $m $n;
return $str;
}
//文字颜色
private function color(){
$color = array();
//暗色
$color[] = '#000080';
$color[] = '#0000EE';
$color[] = '#008B00';
$color[] = '#009ACD';
$color[] = '#191970';
$color[] = '#1C86EE';
$color[] = '#2F4F4F';
$color[] = '#4B0082';
//亮色
$color[] = '#CD0000';
$color[] = '#8E8E38';
$color[] = '#A0522D';
$color[] = '#EE1289';
$color[] = '#FF0000';
$color[] = '#FF4500';
$rgb = $color[rand(0, count($color) - 1)];
return $this->hColor2RGB($rgb);
}
//转换为rgb
function hColor2RGB($hexColor) {
$color = str_replace('#', '', $hexColor);
$rgb = array(
'r' => hexdec(substr($color, 0, 2)),
'g' => hexdec(substr($color, 2, 2)),
'b' => hexdec(substr($color, 4, 2))
);
return $rgb;
}
//绘制椭圆
private function drawarc (){
if($this->arc > 1){
for ($i = 0; $i < $this->arc; $i ){
$color = imagecolorallocate($this->img, rand(0, 255), rand(0, 255), rand(0, 255));
imagearc($this->img, rand(-$this->width, $this->width), rand(-$this->height, $this->height), $this->width, $this->height, $this->width, $this->height, $color);
}
}
}
//绘制虚线
private function drawdashed (){
if($this->dashed > 1){
for ($i = 0; $i < $this->dashed; $i ){
$color = imagecolorallocate($this->img, rand(0, 255), rand(0, 255), rand(0, 255));
imagedashedline($this->img, rand(0, $this->width), 0, rand(0, $this->width), $this->height, $color);
}
}
}
//绘制对角线
private function drawline (){
if($this->line > 1){
for ($i = 0; $i < $this->line; $i ){
$color = imagecolorallocate($this->img, rand(0, 255), rand(0, 255), rand(0, 255));
imageline($this->img, rand(0, $this->width), 0, rand(0, $this->width), $this->height, $color);
}
}
}
//绘制噪点
private function drawpixel(){
if($this->noise > 1){
for ($i = 0; $i < $this->noise; $i ){
$color = imagecolorallocate($this->img, rand(0, 255), rand(0, 255), rand(0, 255));
imagesetpixel($this->img, rand(0, $this->width), rand(0, $this->height), $color);
}
}
}
//析构函数
function __destruct (){
imagedestroy($this->img);
}
}
?>