简单的php加密码

<?php
$strAuthUser= $_SERVER['PHP_AUTH_USER'];
$strAuthPass= $_SERVER['PHP_AUTH_PW'];
if (! ($strAuthUser == "<span style="color: #ff0000;">用户名</span>" &amp;&amp;  $strAuthPass == "密码")) {
header('WWW-Authenticate: Basic realm="Autn"');
header('HTTP/1.0 401 Unauthorized');
echo "用户验证";
exit;
} else {
echo "验证通过";
}
?>