static function GBVerify($length = 4, $type = 'png', $width = 180, $height = 50, $fontface = 'simhei.ttf', $verifyName = 'verify')
{
require_once APP_ROOT_PATH . "system/utils/es_string.php";
$code = es_string::rand_string($length, 4);
$width = $length * 45 > $width ? $length * 45 : $width;
es_session::set($verifyName, md5($code));
$im = imagecreatetruecolor($width, $height);
$borderColor = imagecolorallocate($im, 100, 100, 100);
//边框色
$bkcolor = imagecolorallocate($im, 250, 250, 250);
imagefill($im, 0, 0, $bkcolor);
@imagerectangle($im, 0, 0, $width - 1, $height - 1, $borderColor);
// 干扰
for ($i = 0; $i < 15; $i++) {
$fontcolor = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
imagearc($im, mt_rand(-10, $width), mt_rand(-10, $height), mt_rand(30, 300), mt_rand(20, 200), 55, 44, $fontcolor);
}
for ($i = 0; $i < 255; $i++) {
$fontcolor = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
imagesetpixel($im, mt_rand(0, $width), mt_rand(0, $height), $fontcolor);
}
if (!is_file($fontface)) {
$fontface = dirname(__FILE__) . "/" . $fontface;
}
for ($i = 0; $i < $length; $i++) {
$fontcolor = imagecolorallocate($im, mt_rand(0, 120), mt_rand(0, 120), mt_rand(0, 120));
//这样保证随机出来的颜色较深。
$codex = msubstr($code, $i, 1);
imagettftext($im, mt_rand(16, 20), mt_rand(-60, 60), 40 * $i + 20, mt_rand(30, 35), $fontcolor, $fontface, $codex);
}
es_image::output($im, $type);
}
function LOGIN_DES_KEY()
{
if (!es_session::is_set("DES_KEY")) {
require_once APP_ROOT_PATH . "system/utils/es_string.php";
es_session::set("DES_KEY", es_string::rand_string(50));
}
return es_session::get("DES_KEY");
}
/**
+----------------------------------------------------------
* 带格式生成随机字符 支持批量生成
* 但可能存在重复
+----------------------------------------------------------
* @param es_string $format 字符格式
* # 表示数字 * 表示字母和数字 $ 表示字母
* @param integer $number 生成数量
+----------------------------------------------------------
* @return es_string | array
+----------------------------------------------------------
*/
public static function build_format_rand($format, $number = 1)
{
$str = array();
$length = strlen($format);
for ($j = 0; $j < $number; $j++) {
$strtemp = '';
for ($i = 0; $i < $length; $i++) {
$char = substr($format, $i, 1);
switch ($char) {
case "*":
//字母和数字混合
$strtemp .= es_string::rand_string(1);
break;
case "#":
//数字
$strtemp .= es_string::rand_string(1, 1);
break;
case "\$":
//大写字母
$strtemp .= es_string::rand_string(1, 2);
break;
default:
//其他格式均不转换
$strtemp .= $char;
break;
}
}
$str[] = $strtemp;
}
return $number == 1 ? $strtemp : $str;
}