PHP Regex String in Array - php

Question

I would like to be able to set a global username like <anythinghere>#domain3.com as a username value in the $usernames array (in code below). This is so that I can then go and redirect users based on domain, having already been "authenticated".
I will put example in code below.
Can i do something like $usernames = array("username#domain1.com", $X) where $X = <anything-so-long-as-not-blank>#domain3.com?
Full Code Below:
<?php
//VALIDATE USERS
$usernames = array("username#domain1.com", "username2#domain1.com", "username3#domain1.com", "username1#domain2.com", "username2#domain2.com", "username1#domain3.com");
$passwords = array("password1", "password2", "password3", "password4", "password5", "password6");
//REDIRECT SPECIFIC VALID USERS OR DOMAIN
function get_page($username) {
$username = strtolower($username);
switch ($username) {
case "username#domain1.com" : return "http://www.google.com";
case "username2#domain1.com" : return "http://www.yahoo.com";
case "username3#domain1.com" : return "http://www.stackoverflow.com";
case "username1#domain2.com" : return "http://www.serverfault.com";
}
return preg_match('/#domain3\.com$/',$username) ?
"http://www.backblaze.com" : "DefaultBackupPage.php";
}
$page = get_page($_POST['username']);
for($i=0;$i<count($usernames);$i++)
{
$logindata[$usernames[$i]]=$passwords[$i];
}
$found = 0;
for($i=0;$i<count($usernames);$i++)
{
if ($usernames[$i] == $_POST["username"])
{
$found = 1;
}
}
if ($found == 0)
{
header('Location: login.php?login_error=1');
exit;
}
if($logindata[$_POST["username"]]==$_POST["password"])
{
session_start();
$_SESSION["username"]=$_POST["username"];
header('Location: '.$page);
exit;
}
else
{
header('Location: login.php?login_error=1');
exit;
}
?>
#inhan Has already helped me like a champ. I am wondering if any one can get me over the line? Cheers!

Answer 1

Your code needed a clean-up first. There's a bunch of errors in it if you do a test run. It's also a bit hard to read IMO.
I've attached a working code sample below.
// Get users
$input_pwd = ( isset( $_POST["password"] ) ? $_POST["password"] : '' );
$input_user = ( isset( $_POST["username"] ) ? $_POST["username"] : '' );
// Your pseudo database here ;)
$usernames = array(
"username#domain1.com",
"username2#domain1.com",
"username3#domain1.com",
"username1#domain2.com",
"/[a-z][A-Z][0-9]#domain2\.com/", // use an emtpy password string for each of these
"/[^#]+#domain3\.com/" // entries if they don't need to authenticate
);
$passwords = array( "password1", "password2", "password3", "password4", "", "" );
// Create an array of username literals or patterns and corresponding redirection targets
$targets = array(
"username#domain1.com" => "http://www.google.com",
"username2#domain1.com" => "http://www.yahoo.com",
"username3#domain1.com" => "http://www.stackoverflow.com",
"username1#domain2.com" => "http://www.serverfault.com",
"/[a-z][A-Z][0-9]#domain2\.com/" => "http://target-for-aA1-usertypes.com",
"/[^#]+#domain3\.com/" => "http://target-for-all-domain3-users.com",
"/.+/" => "http://default-target-if-all-else-fails.com",
);
$logindata = array_combine( $usernames, $passwords );
if ( get_user_data( $input_user, $logindata ) === $input_pwd ) {
session_start();
$_SESSION["username"] = $input_user;
header('Location: ' . get_user_data( $input_user, $targets ) );
exit;
} else {
// Supplied username is invalid, or the corresponding password doesn't match
header('Location: login.php?login_error=1');
exit;
}
function get_user_data ( $user, array $data ) {
$retrieved = null;
foreach ( $data as $user_pattern => $value ) {
if (
( $user_pattern[0] == '/' and preg_match( $user_pattern, $user ) )
or ( $user_pattern[0] != '/' and $user_pattern === $user)
) {
$retrieved = $value;
break;
}
}
return $retrieved;
}