"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]);     }; //200 正常状态     header('HTTP/1.1 200 OK'); // 301 永久重定向，记得在后面要加重定向地址 Location:$url     header('HTTP/1.1 301 Moved Permanently'); // 重定向，其实就是302 暂时重定向     header('Location: http://www.maiyoule.com/'); // 设置页面304 没有修改     header('HTTP/1.1 304 Not Modified'); // 显示登录框，     header('HTTP/1.1 401 Unauthorized'); header('WWW-Authenticate: Basic realm="登录信息"'); echo '显示的信息！'; // 403 禁止访问     header('HTTP/1.1 403 Forbidden'); // 404 错误     header('HTTP/1.1 404 Not Found'); // 500 服务器错误     header('HTTP/1.1 500 Internal Server Error'); // 3秒后重定向指定地址(也就是刷新到新页面与