PHP脚本的8个技巧(5)

<?
/* Check for values in $PHP_AUTH_USER and $PHP_AUTH_PW */

if ((!isset($PHP_AUTH_USER)) (!isset($PHP_AUTH_PW))) {

/* No values: send headers causing dialog box to appear */
header('WWW-Authenticate: Basic realm="My Private Stuff"');
header('HTTP/1.0 401 Unauthorized');
echo 'Authorization Required.';
exit;

} else if ((isset($PHP_AUTH_USER)) && (isset($PHP_AUTH_PW))){

/* Values contain some values, so check to see if they're correct */

if (($PHP_AUTH_USER != "validname") ($PHP_AUTH_PW != "goodpassword")) {
/* If either the username entered is incorrect, or the password entered is incorrect, send the headers causing dialog box to appear */
header('WWW-Authenticate: Basic realm="My Private Stuff"');
header('HTTP/1.0 401 Unauthorized');
echo 'Authorization Required.';
exit;
} else if (($PHP_AUTH_USER == "validname") ($PHP_AUTH_PW == "goodpassword")) {
/* if both values are correct, print success message */
echo "<P>You're authorized!</p>";
}
}
?>