一、
验证
/**
* 判断用户名是否规范
*/
function is_username($username)
{
if (preg_match("/^[a-zA-Z]{1}([0-9a-zA-Z]|[._]){3,19}$/",$username))
{
return true;
}
}
/**
* 判断密码是否规范
*/
function is_password($password)
{
if (preg_match("/^[\@A-Za-z0-9\!\#\$\%\^\&\*\.\~]{6,22}$/",$password))
{
return true;
}
}
/**
* 判断是否为数字
*/
function is_number($number)
{
if (preg_match("/^[0-9]*[1-9][0-9]*$/", $number))
{
return true;
}
}
/**
* 判断是否为邮件地址
*/
function is_email($email)
{
if (preg_match("/^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/", $email))
{
return true;
}
}
/**
* 判断是否为字母
*/
function is_letter($letter)
{
if (preg_match("/^[a-z]+$/", $letter))
{
return true;
}
}
/**
* 验证文本域输入的内容
*/
function is_text($text)
{
if (preg_match("/^[\x{4e00}-\x{9fa5}a-zA-Z0-9，,。.？?！!*-_\s]+$/u", $text))
{
return true;
}
}
/**
* 验证文本框输入的内容
*/
function is_textarea($textarea)
{
if (preg_match("/^[\x{4e00}-\x{9fa5}a-zA-Z0-9，,。.？?！!*[email protected]=#\s\n\r]+$/u", $textarea))
{
return true;
}
}
/**
* 判断 文件/目录 是否可写
*/
function check_writeable($file)
{
if (file_exists($file))
{
if (is_dir($file))
{
$dir = $file;
if ($fp = @fopen("$dir/test.txt", ‘w‘))
{
@fclose($fp);
@unlink("$dir/test.txt");
$writeable = 1;
}
else
{
$writeable = 0;
}
}
else
{
if ($fp = @fopen($file, ‘a+‘))
{
@fclose($fp);
$writeable = 1;
}
else
{
$writeable = 0;
}
}
}
else
{
$writeable = 2;
}return $writeable;
}
/**
+----------------------------------------------------------
* 递归方式的对变量中的特殊字符进行转义
+----------------------------------------------------------
*/
function addslashes_deep($value)
{
if (empty ($value))
{
return $value;
}if (is_array($value))
{
foreach ((array) $value as $k => $v)
{
unset ($value[$k]);
$k = addslashes($k);
if (is_array($v))
$value[$k] = addslashes_deep($v);
else
$value[$k] = addslashes($v);
}
}
else
{
$value = addslashes($value);
}
return $value;
}/**
+----------------------------------------------------------
* 递归方式的对变量中的特殊字符去除转义
+----------------------------------------------------------
*/
function stripslashes_deep($value)
{
if (empty ($value))
{
return $value;
}if (is_array($value))
{
foreach ((array) $value as $k => $v)
{
unset ($value[$k]);
$k = stripslashes($k);
if (is_array($v))
{
$value[$k] = stripslashes_deep($v);
}
else
{
$value[$k] = stripslashes($v);
}
}
}
else
{
$value = stripslashes($value);
}
return $value;
}/**
+----------------------------------------------------------
* 交互数据转义操作
+----------------------------------------------------------
*/
function dou_magic_quotes()
{
if ([email protected] get_magic_quotes_gpc())
{
if (!empty ($_GET))
$_GET = addslashes_deep($_GET);
if (!empty ($_POST))
$_POST = addslashes_deep($_POST);
$_COOKIE = addslashes_deep($_COOKIE);
$_REQUEST = addslashes_deep($_REQUEST);
}
}
/**
+----------------------------------------------------------
* 获取真实IP地址
+----------------------------------------------------------
*/
function get_ip()
{
$ip = false;
if (!empty ($_SERVER["HTTP_CLIENT_IP"]))
{
$ip = $_SERVER["HTTP_CLIENT_IP"];
}
if (!empty ($_SERVER[‘HTTP_X_FORWARDED_FOR‘]))
{
$ips = explode(", ", $_SERVER[‘HTTP_X_FORWARDED_FOR‘]);
if ($ip)
{
array_unshift($ips, $ip);
$ip = FALSE;
}
for ($i = 0; $i < count($ips); $i++)
{
if (!preg_match("/^(10|172\.16|192\.168)\./", $ips[$i]))
{
$ip = $ips[$i];
break;
}
}
}
return ($ip ? $ip : $_SERVER[‘REMOTE_ADDR‘]);
}