PHP nested if using $_GET [closed]

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Trying to use a $_GET within a $_GET It's not throwing any errors but isn't working the way I want it to. It's been a while since I've done this so I don't know if I'm overlooking something or not. I'm trying to be able to do something like index.php?chatroom&id=1

$pgtitle = '';
$cractive = '';
$dactive = '';
$acactive = '';
$pgChat = '';
if(isset($_GET['chatroom'])){
    $cractive = 'active';
    if (isset($_GET['cid']) == "1") {
        $pgChat == 'Global Chatroom';
    }else if(isset($_GET['cid']) == "2"){
        $pgChat == 'AK Chatroom';
    }else if(isset($_GET['cid']) == "3"){
        $pgChat == 'AZ Chatroom';
    } else {
        echo '<meta http-equiv="refresh" content="0; URL=index.php?chatroom&cid=1">';
    }
}else{
    header('Location: index.php?dashboard');
}

isset($_GET['cid']) just returns if the key is set, not what the value is. isset($_GET['cid']) == "1" will always return true if it exists, which it does not. You're passing id in the Url, but checking for cid — aynber
– aynber, Commented Nov 9, 2021 at 19:47
Does this answer your question? PHP - Nested If Statements Issue — Abu Nooh
– Abu Nooh, Commented Nov 9, 2021 at 19:49
Test if the variable is set first and report an error if it isn't. Then test the value separately. — Barmar
– Barmar, Commented Nov 9, 2021 at 20:31

Jairo Correa · Accepted Answer · 2021-11-09 21:18:23Z

isset() returns a boolean not the content of the variable, and you was using == instead of = in $pgChat == 'Global Chatroom';, here is an example using your code for something like index.php?chatroom&cid=1:

if (isset($_GET['chatroom'])) {
    $cractive = 'active';

    if (isset($_GET['cid'])) {
        if ($_GET['cid'] == "1") {
            $pgChat = 'Global Chatroom';
        } elseif ($_GET['cid'] == "2") {
            $pgChat = 'AK Chatroom';
        } elseif ($_GET['cid'] == "3") {
            $pgChat = 'AZ Chatroom';
        } else {
            echo '<meta http-equiv="refresh" content="0; URL=index.php?chatroom&cid=1">';
        }
    } else {
        echo '<meta http-equiv="refresh" content="0; URL=index.php?chatroom&cid=1">';
    }
}

EXTRA: You can do the same thing in that way if you wanna.

$chats = [
    '1' => 'Global Chatroom',
    '2' => 'AK Chatroom',
    '3' => 'AZ Chatroom',
];

if (isset($_GET['chatroom'])) {
    $cractive = 'active';

    if (isset($_GET['cid']) && isset($chats[$_GET['cid']])) {
        $pgChat = $chats[$_GET['cid']];
    } else {
        echo '<meta http-equiv="refresh" content="0; URL=index.php?chatroom&cid=1">';
    }
}

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