Am I even doing this right...? (is_live integration into my own site)

API
17

See this adjustment:

On “new token” generation $keys wasn’t being set

<?php

$client_id = "";
$secret_id = "";
$keys = false;
if (file_exists(__DIR__ . "/auth.json")) {
$keys = json_decode(file_get_contents(__DIR__ . "/auth.json"));
}

$generate_token = true;
if ($keys) {
// validate the token

$ch = curl_init("https://id.twitch.tv/oauth2/validate");
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    "Authorization: OAuth " . $keys->access_token
));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$r = curl_exec($ch);
$i = curl_getinfo($ch);
curl_close($ch);

if ($i["http_code"] == 200) {
    // the token appears good
    $generate_token = false;

    // optional to check the expires
    $data = json_decode($r);
    if (json_last_error() == JSON_ERROR_NONE) {
        if ($data->expires_in < 3600) {
            // less than an hour left
            // make a new token
            echo "Token close to expire. Regenerate";
            $generate_token = true;
        }
    } else {
        echo "Failed to parse JSON. Assume dead token";
        $generate_token = true;
    }
}

} else { $generate_token = true; }

if ($generate_token) {
$ch = curl_init("https://id.twitch.tv/oauth2/token");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, array(
"client_id" => $client_id,
"client_secret" => $secret_id,
"grant_type" => "client_credentials"
));

$r = curl_exec($ch);
$i = curl_getinfo($ch);
curl_close($ch);

if ($i["http_code"] == 200) {
    $keys = json_decode($r);
    if (json_last_error() == JSON_ERROR_NONE) {
        echo "Got token";
        print_r($keys);

        // store the token for next run
        file_put_contents(__DIR__ . "/auth.json", $r);
    } else {
        echo "Failed to parse JSON";
        exit;
    }
} else {
    echo "Failed with " . $i["http_code"] . " " . $r;
    exit;
}

} else {
echo "Token OK";
print_r($keys);
}

$user = "darkmage4";//Streamers username
$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, "https://api.twitch.tv/helix/streams?user_login=$user");//Endpoint
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
"Client-ID: $client_id",
"Authorization: Bearer " . $keys->access_token
));
$profile_data = json_decode(curl_exec($ch), true);
curl_close($ch);
print_r($profile_data);

if (!isset($profile_data["data"][0])) {
$live = 0;//Not live
} else {
$live = 1;//Is live
}

if ($live == 1) {
$title = $profile_data["data"][0]["title"];
$viewer_count = $profile_data["data"][0]["viewer_count"];
$game_id = $profile_data["data"][0]["game_id"];
$went_live_at = DateTime::createFromFormat("Y-m-d H:i:s", date("Y-m-d H:i:s", strtotime($profile_data["data"][0]["started_at"])))->format("Y-m-d H:i:s");
$started = date_create($went_live_at);
$now = date_create(date("Y-m-d H:i:s"));
$diff = date_diff($started, $now);
$hours = $diff->h;
$minutes = $diff->i;
echo "
$user is $is_live playing $game_name, started streaming $hours hours $minutes minutes ago and has $viewer_count viewers TITLE: $title";
} else {
echo "
$user is not live";
}

It looks like you took my example https://github.com/BarryCarlyon/twitch_misc/blob/main/authentication/app_access_tokens/php/generate_and_maintain_token.php and didn’t modify it correctly.

This line https://github.com/BarryCarlyon/twitch_misc/blob/main/authentication/app_access_tokens/php/generate_and_maintain_token.php#L62 just has the keys in $data which is useless to the test of the file.

Since this script is only for generating and maintaint a token not for then making other calls, so you missed a modification