public static function output($type=0, $length=4, $sessionName = 'VerificationCode'){
self::$length = $length ? $length : 1;
self::$sessionName = $sessionName;
self::$type = $type ? $type : mt_rand() % 4 +1;
if (self::$type == 4) {
self::$fontSize[0] =16;
self::$fontSize[1] =18;
self::$fontFace = self::$fontChinese[mt_rand() % count(self::$fontChinese)];
}
else{
self::$fontSize[0] =20;
self::$fontSize[1] =24;
self::$fontFace = self::$font[mt_rand() % count(self::$font)];
}
self::$width = (int)(24 * self::$length+tan(deg2rad(30))*24);
//self::$width = 110;
self::$height = 40;
if (strlen(self::$code)==0)
self::createCode(); //生成码值
self::$image=imagecreatetruecolor(self::$width,self::$height);
//两种生成模式的图片
if (self::$type == 4) {
self::createImage1();
}
else{
if (mt_rand()%2) {
self::createImage1();
}
else
self::createImage2();
}
//加入干扰象素;
for($i=0; $i<self::$width; $i++){
$randcolor = ImageColorallocate(self::$image,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255));
imagesetpixel(self::$image, mt_rand()%self::$width , mt_rand()%self::$height , $randcolor);
}
header("Content-type: image/png");
imagepng(self::$image);
imagedestroy(self::$image);
/*echo self::$type;
echo ' - ';
echo self::$code;*/
}
