function encryptUserInfo($user_id, $mobile)
{
$output = "";
// 2位随机字母
$output .= genRandomString(2);
// 用户id
$output .= encryptNumToAlphabet(strval($user_id));
// 分隔符
$output .= 'z';
// 用户手机号，以随机字母间隔
$encryptMobile = encryptNumToAlphabet($mobile);
for ($i = 0; $i < strlen($encryptMobile); $i++) {
$output .= genRandomString(1);
$output .= $encryptMobile[$i];
}
// 分隔符
$output .= 'z';
// 年月日时，以随机字母间隔
$time = date("YmdH", time());
$encryptTime = encryptNumToAlphabet($time);
for ($i = 0; $i < strlen($encryptTime); $i++) {
$output .= genRandomString(1);
$output .= $encryptTime[$i];
}
// 2位随机字母
$output .= genRandomString(2);
return $output;
}
private function encryptExamId($examId)
{
$strExamId = (string) $examId;
$len = strlen($strExamId);
if ($len > 1) {
$loopCount = rand(1, $len);
for ($i = 0; $i < $loopCount; $i++) {
$poz = rand(0, $len - 1);
$strExamId[$poz] = encryptNumToAlphabet($strExamId[$poz]);
}
}
return $strExamId;
}
function encryptId($id)
{
$idStr = (string) $id;
$len = strlen($idStr);
if ($len > 1) {
$loopCount = rand(1, $len);
for ($i = 0; $i < $loopCount; $i++) {
$poz = rand(0, $len - 1);
$idStr[$poz] = encryptNumToAlphabet($idStr[$poz]);
}
}
$shaStr = sha1($id * 3 + 1 . $idStr);
$beginStr = substr($shaStr, 7, 10);
$endStr = substr($shaStr, 23, 10);
return $beginStr . $idStr . $endStr;
}