谁能解释下..3个代码含义---
if(!$_ENV['user']->check_username($username)) {
return UC_USER_CHECK_USERNAME_FAILED;
} elseif(!$_ENV['user']->check_usernamecensor($username)) {
return UC_USER_USERNAME_BADWORD;
} elseif($_ENV['user']->check_usernameexists($username)) {
return UC_USER_USERNAME_EXISTS;
}
//////
对应的代码
function check_usernamecensor($username) {
$_CACHE['badwords'] = $this->base->cache('badwords');
$censorusername = $this->base->get_setting('censorusername');
$censorusername = $censorusername['censorusername'];
$censorexp = '/^('.str_replace(array('\\*', "\r\n", ' '), array('.*', '|', ''), preg_quote(($censorusername = trim($censorusername)), '/')).')$/i';
$usernamereplaced = isset($_CACHE['badwords']['findpattern']) && !empty($_CACHE['badwords']['findpattern']) ? @preg_replace($_CACHE['badwords']['findpattern'], $_CACHE['badwords']['replace'], $username) : $username;
if(($usernamereplaced != $username) || ($censorusername && preg_match($censorexp, $username))) {
return FALSE;
} else {
return TRUE;
}
}
function check_username($username) {
$guestexp = '\xA1\xA1|\xAC\xA3|^Guest|^\xD3\xCE\xBF\xCD|\xB9\x43\xAB\xC8';
$len = strlen($username);
if($len > 15 || $len < 3 || preg_match("/\s+|^c:\\con\\con|[%,\*\"\s\<\>\&]|$guestexp/is", $username)) {
return FALSE;
} else {
return TRUE;
}
}
//验证账号是不是存在
function check_usernameexists($username) {
$data = $this->db->result_first("SELECT username FROM ".UC_DBTABLEPRE."members WHERE username='$username'");
return $data;
}
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