Doctor's WebLog - 博乐的自留地

if(!strcmp(long2ip(sprintf("%u",ip2long($ip))),$ip)) {
echo "is ip\n";
}

eregi("^[_\.0-9a-zA-Z-]+@([0-9a-zA-Z][0-9a-zA-Z_-]+\.)+[a-zA-Z]{2,6}$", $email);

<?php
/**
* HTTP Protocol defined status codes
* @param int $num
*/
function statHTTPStatus($num) {
  static $http = array (
    100 => "HTTP/1.1 100 Continue",
    101 => "HTTP/1.1 101 Switching Protocols",
    200 => "HTTP/1.1 200 OK",
    201 => "HTTP/1.1 201 Created",
    202 => "HTTP/1.1 202 Accepted",
    203 => "HTTP/1.1 203 Non-Authoritative Information",
    204 => "HTTP/1.1 204 No Content",
    205 => "HTTP/1.1 205 Reset Content",
    206 => "HTTP/1.1 206 Partial Content",
    300 => "HTTP/1.1 300 Multiple Choices",
    301 => "HTTP/1.1 301 Moved Permanently",
    302 => "HTTP/1.1 302 Found",
    303 => "HTTP/1.1 303 See Other",
    304 => "HTTP/1.1 304 Not Modified",
    305 => "HTTP/1.1 305 Use Proxy",
    307 => "HTTP/1.1 307 Temporary Redirect",
    400 => "HTTP/1.1 400 Bad Request",
    401 => "HTTP/1.1 401 Unauthorized",
    402 => "HTTP/1.1 402 Payment Required",
    403 => "HTTP/1.1 403 Forbidden",
    404 => "HTTP/1.1 404 Not Found",
    405 => "HTTP/1.1 405 Method Not Allowed",
    406 => "HTTP/1.1 406 Not Acceptable",
    407 => "HTTP/1.1 407 Proxy Authentication Required",
    408 => "HTTP/1.1 408 Request Time-out",
    409 => "HTTP/1.1 409 Conflict",
    410 => "HTTP/1.1 410 Gone",
    411 => "HTTP/1.1 411 Length Required",
    412 => "HTTP/1.1 412 Precondition Failed",
    413 => "HTTP/1.1 413 Request Entity Too Large",
    414 => "HTTP/1.1 414 Request-URI Too Large",
    415 => "HTTP/1.1 415 Unsupported Media Type",
    416 => "HTTP/1.1 416 Requested range not satisfiable",
    417 => "HTTP/1.1 417 Expectation Failed",
    500 => "HTTP/1.1 500 Internal Server Error",
    501 => "HTTP/1.1 501 Not Implemented",
    502 => "HTTP/1.1 502 Bad Gateway",
    503 => "HTTP/1.1 503 Service Unavailable",
    504 => "HTTP/1.1 504 Gateway Time-out"
  );
  header($http[$num]);
}
?>

<?php
statHTTPStatus(301);
Header("Location: http://www.gaobo.info/");
exit;
?>