来自:http://phpweby.com/tutorials/php/35
PHP is not limited to outputting html. PHP can output images, pdf, javascript files, etc. Browsers determine what type of content is by analyzing the headers sent. In this tutorial I will present you with some examples of how to send headers. To send PHP header use the function header(). You must call this function before any output. Use the function headers_sent() to check whether the headers have been sent and output started.
301 moved permanently (redirect):
<?php
header('HTTP/1.1 301 Moved Permanently');
header('Location: http://www.example.com');
die();
?>
302 moved temporarily(redirect):
<?php
header('Location: http://www.example.com');
die();
?>
404 Page Not Found:
<?php
header('HTTP/1.1 404 Not Found');
?>
Service not avaliable:
<?php
header('HTTP/1.1 503 Service Temporarily Unavailable');
header('Status: 503 Service Temporarily Unavailable');
header('Retry-After: 60');
?>
Authentication (force the browser to pop up a Username/Password input window) - only available when PHP is running as an Apache module:
<?php
if (!isset($_SERVER['PHP_AUTH_USER'])) {
header('WWW-Authenticate: Basic realm="The Realm"');
header('HTTP/1.0 401 Unauthorized');
echo 'If cancel is pressed this text shows';
die();
} else {
//always escape your data//
$user='user';
$pass='pass';
if($_SERVER['PHP_AUTH_USER']==$user && $_SERVER['PHP_AUTH_PW']==$pass){
echo 'Authorized';
}
}
?>
php header编码
header("Content-type: text/html; charset=utf-8");